Sophie

Sophie

distrib > Mageia > 3 > i586 > by-pkgid > 1a65e64cf0b803d8ce73aefe8fcc798c > files > 15

perl-5.16.3-1.2.mga3.src.rpm

diff -uNrp perl-5.16.3.orig/dist/Data-Dumper/Dumper.pm perl-5.16.3/dist/Data-Dumper/Dumper.pm
--- perl-5.16.3.orig/dist/Data-Dumper/Dumper.pm	2013-03-04 10:16:21.000000000 -0500
+++ perl-5.16.3/dist/Data-Dumper/Dumper.pm	2014-10-06 15:01:45.864997882 -0400
@@ -10,8 +10,8 @@
 package Data::Dumper;
 
 BEGIN {
-    $VERSION = '2.135_06'; # Don't forget to set version and release
-}			   # date in POD!
+    $VERSION = '2.154'; # Don't forget to set version and release
+}               # date in POD below!
 
 #$| = 1;
 
@@ -30,9 +30,9 @@ BEGIN {
     # XSLoader should be attempted to load, or the pure perl flag
     # toggled on load failure.
     eval {
-	require XSLoader;
-	XSLoader::load( 'Data::Dumper' );
-	1
+        require XSLoader;
+        XSLoader::load( 'Data::Dumper' );
+        1
     }
     or $Useperl = 1;
 }
@@ -55,6 +55,8 @@ $Pair       = ' => '    unless defined $
 $Useperl    = 0         unless defined $Useperl;
 $Sortkeys   = 0         unless defined $Sortkeys;
 $Deparse    = 0         unless defined $Deparse;
+$Sparseseen = 0         unless defined $Sparseseen;
+$Maxrecurse = 1000      unless defined $Maxrecurse;
 
 #
 # expects an arrayref of values to be dumped.
@@ -65,36 +67,38 @@ $Deparse    = 0         unless defined $
 sub new {
   my($c, $v, $n) = @_;
 
-  croak "Usage:  PACKAGE->new(ARRAYREF, [ARRAYREF])" 
+  croak "Usage:  PACKAGE->new(ARRAYREF, [ARRAYREF])"
     unless (defined($v) && (ref($v) eq 'ARRAY'));
   $n = [] unless (defined($n) && (ref($n) eq 'ARRAY'));
 
-  my($s) = { 
-             level      => 0,           # current recursive depth
-	     indent     => $Indent,     # various styles of indenting
-	     pad	=> $Pad,        # all lines prefixed by this string
-	     xpad       => "",          # padding-per-level
-	     apad       => "",          # added padding for hash keys n such
-	     sep        => "",          # list separator
-	     pair	=> $Pair,	# hash key/value separator: defaults to ' => '
-	     seen       => {},          # local (nested) refs (id => [name, val])
-	     todump     => $v,          # values to dump []
-	     names      => $n,          # optional names for values []
-	     varname    => $Varname,    # prefix to use for tagging nameless ones
-             purity     => $Purity,     # degree to which output is evalable
-             useqq 	=> $Useqq,      # use "" for strings (backslashitis ensues)
-             terse 	=> $Terse,      # avoid name output (where feasible)
-             freezer	=> $Freezer,    # name of Freezer method for objects
-             toaster	=> $Toaster,    # name of method to revive objects
-             deepcopy	=> $Deepcopy,   # dont cross-ref, except to stop recursion
-             quotekeys	=> $Quotekeys,  # quote hash keys
-             'bless'	=> $Bless,	# keyword to use for "bless"
-#	     expdepth   => $Expdepth,   # cutoff depth for explicit dumping
-	     maxdepth	=> $Maxdepth,   # depth beyond which we give up
-	     useperl    => $Useperl,    # use the pure Perl implementation
-	     sortkeys   => $Sortkeys,   # flag or filter for sorting hash keys
-	     deparse	=> $Deparse,	# use B::Deparse for coderefs
-	   };
+  my($s) = {
+        level      => 0,           # current recursive depth
+        indent     => $Indent,     # various styles of indenting
+        pad        => $Pad,        # all lines prefixed by this string
+        xpad       => "",          # padding-per-level
+        apad       => "",          # added padding for hash keys n such
+        sep        => "",          # list separator
+        pair       => $Pair,    # hash key/value separator: defaults to ' => '
+        seen       => {},          # local (nested) refs (id => [name, val])
+        todump     => $v,          # values to dump []
+        names      => $n,          # optional names for values []
+        varname    => $Varname,    # prefix to use for tagging nameless ones
+        purity     => $Purity,     # degree to which output is evalable
+        useqq      => $Useqq,      # use "" for strings (backslashitis ensues)
+        terse      => $Terse,      # avoid name output (where feasible)
+        freezer    => $Freezer,    # name of Freezer method for objects
+        toaster    => $Toaster,    # name of method to revive objects
+        deepcopy   => $Deepcopy,   # do not cross-ref, except to stop recursion
+        quotekeys  => $Quotekeys,  # quote hash keys
+        'bless'    => $Bless,    # keyword to use for "bless"
+#        expdepth   => $Expdepth,   # cutoff depth for explicit dumping
+        maxdepth   => $Maxdepth,   # depth beyond which we give up
+	maxrecurse => $Maxrecurse, # depth beyond which we abort
+        useperl    => $Useperl,    # use the pure Perl implementation
+        sortkeys   => $Sortkeys,   # flag or filter for sorting hash keys
+        deparse    => $Deparse,    # use B::Deparse for coderefs
+        noseen     => $Sparseseen, # do not populate the seen hash unless necessary
+       };
 
   if ($Indent > 0) {
     $s->{xpad} = "  ";
@@ -147,21 +151,26 @@ sub Seen {
     init_refaddr_format();
     my($k, $v, $id);
     while (($k, $v) = each %$g) {
-      if (defined $v and ref $v) {
-	$id = format_refaddr($v);
-	if ($k =~ /^[*](.*)$/) {
-	  $k = (ref $v eq 'ARRAY') ? ( "\\\@" . $1 ) :
-	       (ref $v eq 'HASH')  ? ( "\\\%" . $1 ) :
-	       (ref $v eq 'CODE')  ? ( "\\\&" . $1 ) :
-				     (   "\$" . $1 ) ;
-	}
-	elsif ($k !~ /^\$/) {
-	  $k = "\$" . $k;
-	}
-	$s->{seen}{$id} = [$k, $v];
+      if (defined $v) {
+        if (ref $v) {
+          $id = format_refaddr($v);
+          if ($k =~ /^[*](.*)$/) {
+            $k = (ref $v eq 'ARRAY') ? ( "\\\@" . $1 ) :
+                 (ref $v eq 'HASH')  ? ( "\\\%" . $1 ) :
+                 (ref $v eq 'CODE')  ? ( "\\\&" . $1 ) :
+                 (   "\$" . $1 ) ;
+          }
+          elsif ($k !~ /^\$/) {
+            $k = "\$" . $k;
+          }
+          $s->{seen}{$id} = [$k, $v];
+        }
+        else {
+          carp "Only refs supported, ignoring non-ref item \$$k";
+        }
       }
       else {
-	carp "Only refs supported, ignoring non-ref item \$$k";
+        carp "Value of ref must be defined; ignoring undefined item \$$k";
       }
     }
     return $s;
@@ -176,9 +185,14 @@ sub Seen {
 #
 sub Values {
   my($s, $v) = @_;
-  if (defined($v) && (ref($v) eq 'ARRAY'))  {
-    $s->{todump} = [@$v];        # make a copy
-    return $s;
+  if (defined($v)) {
+    if (ref($v) eq 'ARRAY')  {
+      $s->{todump} = [@$v];        # make a copy
+      return $s;
+    }
+    else {
+      croak "Argument to Values, if provided, must be array ref";
+    }
   }
   else {
     return @{$s->{todump}};
@@ -190,9 +204,14 @@ sub Values {
 #
 sub Names {
   my($s, $n) = @_;
-  if (defined($n) && (ref($n) eq 'ARRAY'))  {
-    $s->{names} = [@$n];         # make a copy
-    return $s;
+  if (defined($n)) {
+    if (ref($n) eq 'ARRAY') {
+      $s->{names} = [@$n];         # make a copy
+      return $s;
+    }
+    else {
+      croak "Argument to Names, if provided, must be array ref";
+    }
   }
   else {
     return @{$s->{names}};
@@ -203,9 +222,8 @@ sub DESTROY {}
 
 sub Dump {
     return &Dumpxs
-	unless $Data::Dumper::Useperl || (ref($_[0]) && $_[0]->{useperl}) ||
-	       $Data::Dumper::Useqq   || (ref($_[0]) && $_[0]->{useqq}) ||
-	       $Data::Dumper::Deparse || (ref($_[0]) && $_[0]->{deparse});
+    unless $Data::Dumper::Useperl || (ref($_[0]) && $_[0]->{useperl}) ||
+           $Data::Dumper::Deparse || (ref($_[0]) && $_[0]->{deparse});
     return &Dumpperl;
 }
 
@@ -223,28 +241,9 @@ sub Dumpperl {
   $s = $s->new(@_) unless ref $s;
 
   for $val (@{$s->{todump}}) {
-    my $out = "";
     @post = ();
     $name = $s->{names}[$i++];
-    if (defined $name) {
-      if ($name =~ /^[*](.*)$/) {
-	if (defined $val) {
-	  $name = (ref $val eq 'ARRAY') ? ( "\@" . $1 ) :
-		  (ref $val eq 'HASH')  ? ( "\%" . $1 ) :
-		  (ref $val eq 'CODE')  ? ( "\*" . $1 ) :
-					  ( "\$" . $1 ) ;
-	}
-	else {
-	  $name = "\$" . $1;
-	}
-      }
-      elsif ($name !~ /^\$/) {
-	$name = "\$" . $name;
-      }
-    }
-    else {
-      $name = "\$" . $s->{varname} . $i;
-    }
+    $name = $s->_refine_name($name, $val, $i);
 
     my $valstr;
     {
@@ -254,9 +253,7 @@ sub Dumpperl {
     }
 
     $valstr = "$name = " . $valstr . ';' if @post or !$s->{terse};
-    $out .= $s->{pad} . $valstr . $s->{sep};
-    $out .= $s->{pad} . join(';' . $s->{sep} . $s->{pad}, @post) 
-      . ';' . $s->{sep} if @post;
+    my $out = $s->_compose_out($valstr, \@post);
 
     push @out, $out;
   }
@@ -282,8 +279,7 @@ use constant _bad_vsmg => defined &_vstr
 #
 sub _dump {
   my($s, $val, $name) = @_;
-  my($sname);
-  my($out, $realpack, $realtype, $type, $ipad, $id, $blesspad);
+  my($out, $type, $id, $sname);
 
   $type = ref $val;
   $out = "";
@@ -300,65 +296,70 @@ sub _dump {
     }
 
     require Scalar::Util;
-    $realpack = Scalar::Util::blessed($val);
-    $realtype = $realpack ? Scalar::Util::reftype($val) : ref $val;
+    my $realpack = Scalar::Util::blessed($val);
+    my $realtype = $realpack ? Scalar::Util::reftype($val) : ref $val;
     $id = format_refaddr($val);
 
-    # if it has a name, we need to either look it up, or keep a tab
-    # on it so we know when we hit it later
-    if (defined($name) and length($name)) {
-      # keep a tab on it so that we dont fall into recursive pit
-      if (exists $s->{seen}{$id}) {
-#	if ($s->{expdepth} < $s->{level}) {
-	  if ($s->{purity} and $s->{level} > 0) {
-	    $out = ($realtype eq 'HASH')  ? '{}' :
-	      ($realtype eq 'ARRAY') ? '[]' :
-		'do{my $o}' ;
-	    push @post, $name . " = " . $s->{seen}{$id}[0];
-	  }
-	  else {
-	    $out = $s->{seen}{$id}[0];
-	    if ($name =~ /^([\@\%])/) {
-	      my $start = $1;
-	      if ($out =~ /^\\$start/) {
-		$out = substr($out, 1);
-	      }
-	      else {
-		$out = $start . '{' . $out . '}';
-	      }
-	    }
-          }
-	  return $out;
-#        }
+    # Note: By this point $name is always defined and of non-zero length.
+    # Keep a tab on it so that we do not fall into recursive pit.
+    if (exists $s->{seen}{$id}) {
+      if ($s->{purity} and $s->{level} > 0) {
+        $out = ($realtype eq 'HASH')  ? '{}' :
+               ($realtype eq 'ARRAY') ? '[]' :
+               'do{my $o}' ;
+        push @post, $name . " = " . $s->{seen}{$id}[0];
       }
       else {
-        # store our name
-        $s->{seen}{$id} = [ (($name =~ /^[@%]/)     ? ('\\' . $name ) :
-			     ($realtype eq 'CODE' and
-			      $name =~ /^[*](.*)$/) ? ('\\&' . $1 )   :
-			     $name          ),
-			    $val ];
+        $out = $s->{seen}{$id}[0];
+        if ($name =~ /^([\@\%])/) {
+          my $start = $1;
+          if ($out =~ /^\\$start/) {
+            $out = substr($out, 1);
+          }
+          else {
+            $out = $start . '{' . $out . '}';
+          }
+        }
       }
+      return $out;
+    }
+    else {
+      # store our name
+      $s->{seen}{$id} = [ (
+          ($name =~ /^[@%]/)
+            ? ('\\' . $name )
+            : ($realtype eq 'CODE' and $name =~ /^[*](.*)$/)
+              ? ('\\&' . $1 )
+              : $name
+        ), $val ];
     }
-    my $no_bless = 0; 
+    my $no_bless = 0;
     my $is_regex = 0;
     if ( $realpack and ($] >= 5.009005 ? re::is_regexp($val) : $realpack eq 'Regexp') ) {
         $is_regex = 1;
         $no_bless = $realpack eq 'Regexp';
     }
 
-    # If purity is not set and maxdepth is set, then check depth: 
+    # If purity is not set and maxdepth is set, then check depth:
     # if we have reached maximum depth, return the string
     # representation of the thing we are currently examining
-    # at this depth (i.e., 'Foo=ARRAY(0xdeadbeef)'). 
+    # at this depth (i.e., 'Foo=ARRAY(0xdeadbeef)').
     if (!$s->{purity}
-	and $s->{maxdepth} > 0
-	and $s->{level} >= $s->{maxdepth})
+      and defined($s->{maxdepth})
+      and $s->{maxdepth} > 0
+      and $s->{level} >= $s->{maxdepth})
     {
       return qq['$val'];
     }
 
+    # avoid recursing infinitely [perl #122111]
+    if ($s->{maxrecurse} > 0
+        and $s->{level} >= $s->{maxrecurse}) {
+        die "Recursion limit of $s->{maxrecurse} exceeded";
+    }
+
     # we have a blessed ref
+    my ($blesspad);
     if ($realpack and !$no_bless) {
       $out = $s->{'bless'} . '( ';
       $blesspad = $s->{apad};
@@ -366,131 +367,136 @@ sub _dump {
     }
 
     $s->{level}++;
-    $ipad = $s->{xpad} x $s->{level};
+    my $ipad = $s->{xpad} x $s->{level};
 
     if ($is_regex) {
         my $pat;
-        # This really sucks, re:regexp_pattern is in ext/re/re.xs and not in 
-        # universal.c, and even worse we cant just require that re to be loaded
-        # we *have* to use() it. 
-        # We should probably move it to universal.c for 5.10.1 and fix this.
-        # Currently we only use re::regexp_pattern when the re is blessed into another
-        # package. This has the disadvantage of meaning that a DD dump won't round trip
-        # as the pattern will be repeatedly wrapped with the same modifiers.
-        # This is an aesthetic issue so we will leave it for now, but we could use
-        # regexp_pattern() in list context to get the modifiers separately.
-        # But since this means loading the full debugging engine in process we wont
-        # bother unless its necessary for accuracy.
-        if (($realpack ne 'Regexp') && defined(*re::regexp_pattern{CODE})) {
-            $pat = re::regexp_pattern($val);
-        } else {
-            $pat = "$val";
+        my $flags = "";
+        if (defined(*re::regexp_pattern{CODE})) {
+          ($pat, $flags) = re::regexp_pattern($val);
+        }
+        else {
+          $pat = "$val";
         }
         $pat =~ s <(\\.)|/> { $1 || '\\/' }ge;
-        $out .= "qr/$pat/";
+        $out .= "qr/$pat/$flags";
     }
     elsif ($realtype eq 'SCALAR' || $realtype eq 'REF'
-	|| $realtype eq 'VSTRING') {
+    || $realtype eq 'VSTRING') {
       if ($realpack) {
-	$out .= 'do{\\(my $o = ' . $s->_dump($$val, "\${$name}") . ')}';
+        $out .= 'do{\\(my $o = ' . $s->_dump($$val, "\${$name}") . ')}';
       }
       else {
-	$out .= '\\' . $s->_dump($$val, "\${$name}");
+        $out .= '\\' . $s->_dump($$val, "\${$name}");
       }
     }
     elsif ($realtype eq 'GLOB') {
-	$out .= '\\' . $s->_dump($$val, "*{$name}");
+      $out .= '\\' . $s->_dump($$val, "*{$name}");
     }
     elsif ($realtype eq 'ARRAY') {
       my($pad, $mname);
       my($i) = 0;
       $out .= ($name =~ /^\@/) ? '(' : '[';
       $pad = $s->{sep} . $s->{pad} . $s->{apad};
-      ($name =~ /^\@(.*)$/) ? ($mname = "\$" . $1) : 
-	# omit -> if $foo->[0]->{bar}, but not ${$foo->[0]}->{bar}
-	($name =~ /^\\?[\%\@\*\$][^{].*[]}]$/) ? ($mname = $name) :
-	  ($mname = $name . '->');
+      ($name =~ /^\@(.*)$/) ? ($mname = "\$" . $1) :
+    # omit -> if $foo->[0]->{bar}, but not ${$foo->[0]}->{bar}
+        ($name =~ /^\\?[\%\@\*\$][^{].*[]}]$/) ? ($mname = $name) :
+        ($mname = $name . '->');
       $mname .= '->' if $mname =~ /^\*.+\{[A-Z]+\}$/;
       for my $v (@$val) {
-	$sname = $mname . '[' . $i . ']';
-	$out .= $pad . $ipad . '#' . $i if $s->{indent} >= 3;
-	$out .= $pad . $ipad . $s->_dump($v, $sname);
-	$out .= "," if $i++ < $#$val;
+        $sname = $mname . '[' . $i . ']';
+        $out .= $pad . $ipad . '#' . $i
+          if $s->{indent} >= 3;
+        $out .= $pad . $ipad . $s->_dump($v, $sname);
+        $out .= "," if $i++ < $#$val;
       }
       $out .= $pad . ($s->{xpad} x ($s->{level} - 1)) if $i;
       $out .= ($name =~ /^\@/) ? ')' : ']';
     }
     elsif ($realtype eq 'HASH') {
-      my($k, $v, $pad, $lpad, $mname, $pair);
+      my ($k, $v, $pad, $lpad, $mname, $pair);
       $out .= ($name =~ /^\%/) ? '(' : '{';
       $pad = $s->{sep} . $s->{pad} . $s->{apad};
       $lpad = $s->{apad};
       $pair = $s->{pair};
       ($name =~ /^\%(.*)$/) ? ($mname = "\$" . $1) :
-	# omit -> if $foo->[0]->{bar}, but not ${$foo->[0]}->{bar}
-	($name =~ /^\\?[\%\@\*\$][^{].*[]}]$/) ? ($mname = $name) :
-	  ($mname = $name . '->');
+    # omit -> if $foo->[0]->{bar}, but not ${$foo->[0]}->{bar}
+        ($name =~ /^\\?[\%\@\*\$][^{].*[]}]$/) ? ($mname = $name) :
+        ($mname = $name . '->');
       $mname .= '->' if $mname =~ /^\*.+\{[A-Z]+\}$/;
-      my ($sortkeys, $keys, $key) = ("$s->{sortkeys}");
+      my $sortkeys = defined($s->{sortkeys}) ? $s->{sortkeys} : '';
+      my $keys = [];
       if ($sortkeys) {
-	if (ref($s->{sortkeys}) eq 'CODE') {
-	  $keys = $s->{sortkeys}($val);
-	  unless (ref($keys) eq 'ARRAY') {
-	    carp "Sortkeys subroutine did not return ARRAYREF";
-	    $keys = [];
-	  }
-	}
-	else {
-	  $keys = [ sort keys %$val ];
-	}
+        if (ref($s->{sortkeys}) eq 'CODE') {
+          $keys = $s->{sortkeys}($val);
+          unless (ref($keys) eq 'ARRAY') {
+            carp "Sortkeys subroutine did not return ARRAYREF";
+            $keys = [];
+          }
+        }
+        else {
+          $keys = [ sort keys %$val ];
+        }
       }
 
       # Ensure hash iterator is reset
       keys(%$val);
 
+      my $key;
       while (($k, $v) = ! $sortkeys ? (each %$val) :
-	     @$keys ? ($key = shift(@$keys), $val->{$key}) :
-	     () ) 
+         @$keys ? ($key = shift(@$keys), $val->{$key}) :
+         () )
       {
-	my $nk = $s->_dump($k, "");
-	$nk = $1 if !$s->{quotekeys} and $nk =~ /^[\"\']([A-Za-z_]\w*)[\"\']$/;
-	$sname = $mname . '{' . $nk . '}';
-	$out .= $pad . $ipad . $nk . $pair;
-
-	# temporarily alter apad
-	$s->{apad} .= (" " x (length($nk) + 4)) if $s->{indent} >= 2;
-	$out .= $s->_dump($val->{$k}, $sname) . ",";
-	$s->{apad} = $lpad if $s->{indent} >= 2;
+        my $nk = $s->_dump($k, "");
+
+        # _dump doesn't quote numbers of this form
+        if ($s->{quotekeys} && $nk =~ /^(?:0|-?[1-9][0-9]{0,8})\z/) {
+          $nk = $s->{useqq} ? qq("$nk") : qq('$nk');
+        }
+        elsif (!$s->{quotekeys} and $nk =~ /^[\"\']([A-Za-z_]\w*)[\"\']$/) {
+          $nk = $1
+        }
+
+        $sname = $mname . '{' . $nk . '}';
+        $out .= $pad . $ipad . $nk . $pair;
+
+        # temporarily alter apad
+        $s->{apad} .= (" " x (length($nk) + 4))
+          if $s->{indent} >= 2;
+        $out .= $s->_dump($val->{$k}, $sname) . ",";
+        $s->{apad} = $lpad
+          if $s->{indent} >= 2;
       }
       if (substr($out, -1) eq ',') {
-	chop $out;
-	$out .= $pad . ($s->{xpad} x ($s->{level} - 1));
+        chop $out;
+        $out .= $pad . ($s->{xpad} x ($s->{level} - 1));
       }
       $out .= ($name =~ /^\%/) ? ')' : '}';
     }
     elsif ($realtype eq 'CODE') {
       if ($s->{deparse}) {
-	require B::Deparse;
-	my $sub =  'sub ' . (B::Deparse->new)->coderef2text($val);
-	$pad    =  $s->{sep} . $s->{pad} . $s->{apad} . $s->{xpad} x ($s->{level} - 1);
-	$sub    =~ s/\n/$pad/gse;
-	$out   .=  $sub;
-      } else {
+        require B::Deparse;
+        my $sub =  'sub ' . (B::Deparse->new)->coderef2text($val);
+        $pad    =  $s->{sep} . $s->{pad} . $s->{apad} . $s->{xpad} x ($s->{level} - 1);
+        $sub    =~ s/\n/$pad/gse;
+        $out   .=  $sub;
+      }
+      else {
         $out .= 'sub { "DUMMY" }';
         carp "Encountered CODE ref, using dummy placeholder" if $s->{purity};
       }
     }
     else {
-      croak "Can\'t handle $realtype type.";
+      croak "Can't handle '$realtype' type";
     }
-    
+
     if ($realpack and !$no_bless) { # we have a blessed ref
       $out .= ', ' . _quote($realpack) . ' )';
-      $out .= '->' . $s->{toaster} . '()'  if $s->{toaster} ne '';
+      $out .= '->' . $s->{toaster} . '()'
+        if $s->{toaster} ne '';
       $s->{apad} = $blesspad;
     }
     $s->{level}--;
-
   }
   else {                                 # simple scalar
 
@@ -501,46 +507,46 @@ sub _dump {
       $id = format_refaddr($ref);
       if (exists $s->{seen}{$id}) {
         if ($s->{seen}{$id}[2]) {
-	  $out = $s->{seen}{$id}[0];
-	  #warn "[<$out]\n";
-	  return "\${$out}";
-	}
+          $out = $s->{seen}{$id}[0];
+          #warn "[<$out]\n";
+          return "\${$out}";
+        }
       }
       else {
-	#warn "[>\\$name]\n";
-	$s->{seen}{$id} = ["\\$name", $ref];
+        #warn "[>\\$name]\n";
+        $s->{seen}{$id} = ["\\$name", $ref];
       }
     }
     $ref = \$val;
     if (ref($ref) eq 'GLOB') {  # glob
       my $name = substr($val, 1);
       if ($name =~ /^[A-Za-z_][\w:]*$/ && $name ne 'main::') {
-	$name =~ s/^main::/::/;
-	$sname = $name;
+        $name =~ s/^main::/::/;
+        $sname = $name;
       }
       else {
-	$sname = $s->_dump(
-	  $name eq 'main::' || $] < 5.007 && $name eq "main::\0"
-	    ? ''
-	    : $name,
-	  "",
-	);
-	$sname = '{' . $sname . '}';
+        $sname = $s->_dump(
+          $name eq 'main::' || $] < 5.007 && $name eq "main::\0"
+            ? ''
+            : $name,
+          "",
+        );
+        $sname = '{' . $sname . '}';
       }
       if ($s->{purity}) {
-	my $k;
-	local ($s->{level}) = 0;
-	for $k (qw(SCALAR ARRAY HASH)) {
-	  my $gval = *$val{$k};
-	  next unless defined $gval;
-	  next if $k eq "SCALAR" && ! defined $$gval;  # always there
-
-	  # _dump can push into @post, so we hold our place using $postlen
-	  my $postlen = scalar @post;
-	  $post[$postlen] = "\*$sname = ";
-	  local ($s->{apad}) = " " x length($post[$postlen]) if $s->{indent} >= 2;
-	  $post[$postlen] .= $s->_dump($gval, "\*$sname\{$k\}");
-	}
+        my $k;
+        local ($s->{level}) = 0;
+        for $k (qw(SCALAR ARRAY HASH)) {
+          my $gval = *$val{$k};
+          next unless defined $gval;
+          next if $k eq "SCALAR" && ! defined $$gval;  # always there
+
+          # _dump can push into @post, so we hold our place using $postlen
+          my $postlen = scalar @post;
+          $post[$postlen] = "\*$sname = ";
+          local ($s->{apad}) = " " x length($post[$postlen]) if $s->{indent} >= 2;
+          $post[$postlen] .= $s->_dump($gval, "\*$sname\{$k\}");
+        }
       }
       $out .= '*' . $sname;
     }
@@ -548,20 +554,21 @@ sub _dump {
       $out .= "undef";
     }
     elsif (defined &_vstring and $v = _vstring($val)
-	and !_bad_vsmg || eval $v eq $val) {
+      and !_bad_vsmg || eval $v eq $val) {
       $out .= $v;
     }
     elsif (!defined &_vstring
        and ref $ref eq 'VSTRING' || eval{Scalar::Util::isvstring($val)}) {
       $out .= sprintf "%vd", $val;
     }
-    elsif ($val =~ /^(?:0|-?[1-9]\d{0,8})\z/) { # safe decimal number
+    # \d here would treat "1\x{660}" as a safe decimal number
+    elsif ($val =~ /^(?:0|-?[1-9][0-9]{0,8})\z/) { # safe decimal number
       $out .= $val;
     }
-    else {				 # string
+    else {                 # string
       if ($s->{useqq} or $val =~ tr/\0-\377//c) {
         # Fall back to qq if there's Unicode
-	$out .= qquote($val, $s->{useqq});
+        $out .= qquote($val, $s->{useqq});
       }
       else {
         $out .= _quote($val);
@@ -580,7 +587,7 @@ sub _dump {
   }
   return $out;
 }
-  
+
 #
 # non-OO style of earlier version
 #
@@ -593,12 +600,8 @@ sub DumperX {
   return Data::Dumper->Dumpxs([@_], []);
 }
 
-sub Dumpf { return Data::Dumper->Dump(@_) }
-
-sub Dumpp { print Data::Dumper->Dump(@_) }
-
 #
-# reset the "seen" cache 
+# reset the "seen" cache
 #
 sub Reset {
   my($s) = shift;
@@ -685,6 +688,11 @@ sub Maxdepth {
   defined($v) ? (($s->{'maxdepth'} = $v), return $s) : $s->{'maxdepth'};
 }
 
+sub Maxrecurse {
+  my($s, $v) = @_;
+  defined($v) ? (($s->{'maxrecurse'} = $v), return $s) : $s->{'maxrecurse'};
+}
+
 sub Useperl {
   my($s, $v) = @_;
   defined($v) ? (($s->{'useperl'} = $v), return $s) : $s->{'useperl'};
@@ -700,8 +708,13 @@ sub Deparse {
   defined($v) ? (($s->{'deparse'} = $v), return $s) : $s->{'deparse'};
 }
 
+sub Sparseseen {
+  my($s, $v) = @_;
+  defined($v) ? (($s->{'noseen'} = $v), return $s) : $s->{'noseen'};
+}
+
 # used by qquote below
-my %esc = (  
+my %esc = (
     "\a" => "\\a",
     "\b" => "\\b",
     "\t" => "\\t",
@@ -716,8 +729,8 @@ sub qquote {
   local($_) = shift;
   s/([\\\"\@\$])/\\$1/g;
   my $bytes; { use bytes; $bytes = length }
-  s/([^\x00-\x7f])/'\x{'.sprintf("%x",ord($1)).'}'/ge if $bytes > length;
-  return qq("$_") unless 
+  s/([[:^ascii:]])/'\x{'.sprintf("%x",ord($1)).'}'/ge if $bytes > length;
+  return qq("$_") unless
     /[^ !"\#\$%&'()*+,\-.\/0-9:;<=>?\@A-Z[\\\]^_`a-z{|}~]/;  # fast exit
 
   my $high = shift || "";
@@ -754,6 +767,45 @@ sub qquote {
 # access to sortsv() from XS
 sub _sortkeys { [ sort keys %{$_[0]} ] }
 
+sub _refine_name {
+    my $s = shift;
+    my ($name, $val, $i) = @_;
+    if (defined $name) {
+      if ($name =~ /^[*](.*)$/) {
+        if (defined $val) {
+            $name = (ref $val eq 'ARRAY') ? ( "\@" . $1 ) :
+              (ref $val eq 'HASH')  ? ( "\%" . $1 ) :
+              (ref $val eq 'CODE')  ? ( "\*" . $1 ) :
+              ( "\$" . $1 ) ;
+        }
+        else {
+          $name = "\$" . $1;
+        }
+      }
+      elsif ($name !~ /^\$/) {
+        $name = "\$" . $name;
+      }
+    }
+    else { # no names provided
+      $name = "\$" . $s->{varname} . $i;
+    }
+    return $name;
+}
+
+sub _compose_out {
+    my $s = shift;
+    my ($valstr, $postref) = @_;
+    my $out = "";
+    $out .= $s->{pad} . $valstr . $s->{sep};
+    if (@{$postref}) {
+        $out .= $s->{pad} .
+            join(';' . $s->{sep} . $s->{pad}, @{$postref}) .
+            ';' .
+            $s->{sep};
+    }
+    return $out;
+}
+
 1;
 __END__
 
@@ -794,7 +846,8 @@ variable is output in a single Perl stat
 structures correctly.
 
 The return value can be C<eval>ed to get back an identical copy of the
-original reference structure.
+original reference structure.  (Please do consider the security implications
+of eval'ing code from untrusted sources!)
 
 Any references that are the same as one of those passed in will be named
 C<$VAR>I<n> (where I<n> is a numeric suffix), and other duplicate references
@@ -812,7 +865,7 @@ these references.  Moreover, if C<eval>e
 you need to ensure that any variables it accesses are previously declared.
 
 In the extended usage form, the references to be dumped can be given
-user-specified names.  If a name begins with a C<*>, the output will 
+user-specified names.  If a name begins with a C<*>, the output will
 describe the dereferenced type of the supplied reference for hashes and
 arrays, and coderefs.  Output of names will be avoided where possible if
 the C<Terse> flag is set.
@@ -822,7 +875,7 @@ object will return the object itself, so
 chained together.
 
 Several styles of output are possible, all controlled by setting
-the C<Indent> flag.  See L<Configuration Variables or Methods> below 
+the C<Indent> flag.  See L<Configuration Variables or Methods> below
 for details.
 
 
@@ -874,15 +927,21 @@ itself.
 
 =item I<$OBJ>->Values(I<[ARRAYREF]>)
 
-Queries or replaces the internal array of values that will be dumped.
-When called without arguments, returns the values.  Otherwise, returns the
-object itself.
+Queries or replaces the internal array of values that will be dumped.  When
+called without arguments, returns the values as a list.  When called with a
+reference to an array of replacement values, returns the object itself.  When
+called with any other type of argument, dies.
 
 =item I<$OBJ>->Names(I<[ARRAYREF]>)
 
 Queries or replaces the internal array of user supplied names for the values
-that will be dumped.  When called without arguments, returns the names.
-Otherwise, returns the object itself.
+that will be dumped.  When called without arguments, returns the names.  When
+called with an array of replacement names, returns the object itself.  If the
+number of replacement names exceeds the number of values to be named, the
+excess names will not be used.  If the number of replacement names falls short
+of the number of values to be named, the list of replacement names will be
+exhausted and remaining values will not be renamed.  When
+called with any other type of argument, dies.
 
 =item I<$OBJ>->Reset
 
@@ -909,7 +968,7 @@ in a list context.
 Several configuration variables can be used to control the kind of output
 generated when using the procedural interface.  These variables are usually
 C<local>ized in a block so that other parts of the code are not affected by
-the change.  
+the change.
 
 These variables determine the default state of the object created by calling
 the C<new> method, but cannot be used to alter the state of the object
@@ -1022,7 +1081,7 @@ Cross-referencing will then only be done
 $Data::Dumper::Quotekeys  I<or>  $I<OBJ>->Quotekeys(I<[NEWVAL]>)
 
 Can be set to a boolean value to control whether hash keys are quoted.
-A false value will avoid quoting hash keys when it looks like a simple
+A defined false value will avoid quoting hash keys when it looks like a simple
 string.  Default is 1, which will always enclose hash keys in quotes.
 
 =item *
@@ -1054,8 +1113,18 @@ $Data::Dumper::Maxdepth  I<or>  $I<OBJ>-
 Can be set to a positive integer that specifies the depth beyond which
 we don't venture into a structure.  Has no effect when
 C<Data::Dumper::Purity> is set.  (Useful in debugger when we often don't
-want to see more than enough).  Default is 0, which means there is 
-no maximum depth. 
+want to see more than enough).  Default is 0, which means there is
+no maximum depth.
+
+=item *
+
+$Data::Dumper::Maxrecurse  I<or>  $I<OBJ>->Maxrecurse(I<[NEWVAL]>)
+
+Can be set to a positive integer that specifies the depth beyond which
+recursion into a structure will throw an exception.  This is intended
+as a security measure to prevent perl running out of stack space when
+dumping an excessively deep structure.  Can be set to 0 to remove the
+limit.  Default is 1000.
 
 =item *
 
@@ -1099,6 +1168,26 @@ XSUB implementation doesn't support it.
 Caution : use this option only if you know that your coderefs will be
 properly reconstructed by C<B::Deparse>.
 
+=item *
+
+$Data::Dumper::Sparseseen I<or>  $I<OBJ>->Sparseseen(I<[NEWVAL]>)
+
+By default, Data::Dumper builds up the "seen" hash of scalars that
+it has encountered during serialization. This is very expensive.
+This seen hash is necessary to support and even just detect circular
+references. It is exposed to the user via the C<Seen()> call both
+for writing and reading.
+
+If you, as a user, do not need explicit access to the "seen" hash,
+then you can set the C<Sparseseen> option to allow Data::Dumper
+to eschew building the "seen" hash for scalars that are known not
+to possess more than one reference. This speeds up serialization
+considerably if you use the XS implementation.
+
+Note: If you turn on C<Sparseseen>, then you must not rely on the
+content of the seen hash since its contents will be an
+implementation detail!
+
 =back
 
 =head2 Exports
@@ -1130,7 +1219,7 @@ distribution for more examples.)
     $foo = Foo->new;
     $fuz = Fuz->new;
     $boo = [ 1, [], "abcd", \*foo,
-             {1 => 'a', 023 => 'b', 0x45 => 'c'}, 
+             {1 => 'a', 023 => 'b', 0x45 => 'c'},
              \\"p\q\'r", $foo, $fuz];
 
     ########
@@ -1220,20 +1309,20 @@ distribution for more examples.)
     sub new { bless { state => 'awake' }, shift }
     sub Freeze {
         my $s = shift;
-	print STDERR "preparing to sleep\n";
-	$s->{state} = 'asleep';
-	return bless $s, 'Foo::ZZZ';
+        print STDERR "preparing to sleep\n";
+        $s->{state} = 'asleep';
+        return bless $s, 'Foo::ZZZ';
     }
 
     package Foo::ZZZ;
     sub Thaw {
         my $s = shift;
-	print STDERR "waking up\n";
-	$s->{state} = 'awake';
-	return bless $s, 'Foo';
+        print STDERR "waking up\n";
+        $s->{state} = 'awake';
+        return bless $s, 'Foo';
     }
 
-    package Foo;
+    package main;
     use Data::Dumper;
     $a = Foo->new;
     $b = Data::Dumper->new([$a], ['c']);
@@ -1326,13 +1415,13 @@ be to use the C<Sortkeys> filter of Data
 
 Gurusamy Sarathy        gsar@activestate.com
 
-Copyright (c) 1996-98 Gurusamy Sarathy. All rights reserved.
+Copyright (c) 1996-2014 Gurusamy Sarathy. All rights reserved.
 This program is free software; you can redistribute it and/or
 modify it under the same terms as Perl itself.
 
 =head1 VERSION
 
-Version 2.135_06  (March 20 2012)
+Version 2.154  (September 18 2014)
 
 =head1 SEE ALSO
 
diff -uNrp perl-5.16.3.orig/dist/Data-Dumper/Dumper.xs perl-5.16.3/dist/Data-Dumper/Dumper.xs
--- perl-5.16.3.orig/dist/Data-Dumper/Dumper.xs	2013-03-04 10:16:21.000000000 -0500
+++ perl-5.16.3/dist/Data-Dumper/Dumper.xs	2014-10-06 15:01:46.304999478 -0400
@@ -12,22 +12,32 @@
 #  define DD_USE_OLD_ID_FORMAT
 #endif
 
+#ifndef isWORDCHAR
+#   define isWORDCHAR(c) isALNUM(c)
+#endif
+
 static I32 num_q (const char *s, STRLEN slen);
 static I32 esc_q (char *dest, const char *src, STRLEN slen);
-static I32 esc_q_utf8 (pTHX_ SV *sv, const char *src, STRLEN slen);
-static I32 needs_quote(register const char *s, STRLEN len);
+static I32 esc_q_utf8 (pTHX_ SV *sv, const char *src, STRLEN slen, I32 do_utf8, I32 useqq);
+static bool globname_needs_quote(const char *s, STRLEN len);
+static bool key_needs_quote(const char *s, STRLEN len);
+static bool safe_decimal_number(const char *p, STRLEN len);
 static SV *sv_x (pTHX_ SV *sv, const char *str, STRLEN len, I32 n);
 static I32 DD_dump (pTHX_ SV *val, const char *name, STRLEN namelen, SV *retval,
 		    HV *seenhv, AV *postav, I32 *levelp, I32 indent,
 		    SV *pad, SV *xpad, SV *apad, SV *sep, SV *pair,
 		    SV *freezer, SV *toaster,
 		    I32 purity, I32 deepcopy, I32 quotekeys, SV *bless,
-		    I32 maxdepth, SV *sortkeys);
+		    I32 maxdepth, SV *sortkeys, int use_sparse_seen_hash, I32 useqq, IV maxrecurse);
 
 #ifndef HvNAME_get
 #define HvNAME_get HvNAME
 #endif
 
+/* Perls 7 through portions of 15 used utf8_to_uvchr() which didn't have a
+ * length parameter.  This wrongly allowed reading beyond the end of buffer
+ * given malformed input */
+
 #if PERL_VERSION <= 6 /* Perl 5.6 and earlier */
 
 # ifdef EBCDIC
@@ -47,11 +57,33 @@ Perl_utf8_to_uvchr_buf(pTHX_ U8 *s, U8 *
 # if !defined(PERL_IMPLICIT_CONTEXT)
 #  define utf8_to_uvchr_buf	     Perl_utf8_to_uvchr_buf
 # else
-#  define utf8_to_uvchr_buf(a,b) Perl_utf8_to_uvchr_buf(aTHX_ a,b)
+#  define utf8_to_uvchr_buf(a,b,c) Perl_utf8_to_uvchr_buf(aTHX_ a,b,c)
 # endif
 
 #endif /* PERL_VERSION <= 6 */
 
+/* Perl 5.7 through part of 5.15 */
+#if PERL_VERSION > 6 && PERL_VERSION <= 15 && ! defined(utf8_to_uvchr_buf)
+
+UV
+Perl_utf8_to_uvchr_buf(pTHX_ U8 *s, U8 *send, STRLEN *retlen)
+{
+    /* We have to discard <send> for these versions; hence can read off the
+     * end of the buffer if there is a malformation that indicates the
+     * character is longer than the space available */
+
+    const UV uv = utf8_to_uvchr(s, retlen);
+    return UNI_TO_NATIVE(uv);
+}
+
+# if !defined(PERL_IMPLICIT_CONTEXT)
+#  define utf8_to_uvchr_buf	     Perl_utf8_to_uvchr_buf
+# else
+#  define utf8_to_uvchr_buf(a,b,c) Perl_utf8_to_uvchr_buf(aTHX_ a,b,c)
+# endif
+
+#endif /* PERL_VERSION > 6 && <= 15 */
+
 /* Changes in 5.7 series mean that now IOK is only set if scalar is
    precisely integer but in 5.6 and earlier we need to do a more
    complex test  */
@@ -61,39 +93,95 @@ Perl_utf8_to_uvchr_buf(pTHX_ U8 *s, U8 *
 #define DD_is_integer(sv) SvIOK(sv)
 #endif
 
-/* does a string need to be protected? */
-static I32
-needs_quote(register const char *s, STRLEN len)
+/* does a glob name need to be protected? */
+static bool
+globname_needs_quote(const char *s, STRLEN len)
 {
     const char *send = s+len;
 TOP:
     if (s[0] == ':') {
 	if (++s<send) {
 	    if (*s++ != ':')
-		return 1;
+                return TRUE;
 	}
 	else
-	    return 1;
+	    return TRUE;
     }
     if (isIDFIRST(*s)) {
 	while (++s<send)
-	    if (!isALNUM(*s)) {
+	    if (!isWORDCHAR(*s)) {
 		if (*s == ':')
 		    goto TOP;
 		else
-		    return 1;
+                    return TRUE;
 	    }
     }
     else
-	return 1;
-    return 0;
+        return TRUE;
+
+    return FALSE;
+}
+
+/* does a hash key need to be quoted (to the left of => ).
+   Previously this used (globname_)needs_quote() which accepted strings
+   like '::foo', but these aren't safe as unquoted keys under strict.
+*/
+static bool
+key_needs_quote(const char *s, STRLEN len) {
+    const char *send = s+len;
+
+    if (safe_decimal_number(s, len)) {
+        return FALSE;
+    }
+    else if (isIDFIRST(*s)) {
+        while (++s<send)
+            if (!isWORDCHAR(*s))
+                return TRUE;
+    }
+    else
+        return TRUE;
+
+    return FALSE;
+}
+
+/* Check that the SV can be represented as a simple decimal integer.
+ *
+ * The perl code does this by matching against /^(?:0|-?[1-9]\d{0,8})\z/
+*/
+static bool
+safe_decimal_number(const char *p, STRLEN len) {
+    if (len == 1 && *p == '0')
+        return TRUE;
+
+    if (len && *p == '-') {
+        ++p;
+        --len;
+    }
+
+    if (len == 0 || *p < '1' || *p > '9')
+        return FALSE;
+
+    ++p;
+    --len;
+
+    if (len > 8)
+        return FALSE;
+
+    while (len > 0) {
+         /* the perl code checks /\d/ but we don't want unicode digits here */
+         if (*p < '0' || *p > '9')
+             return FALSE;
+         ++p;
+         --len;
+    }
+    return TRUE;
 }
 
 /* count the number of "'"s and "\"s in string */
 static I32
-num_q(register const char *s, register STRLEN slen)
+num_q(const char *s, STRLEN slen)
 {
-    register I32 ret = 0;
+    I32 ret = 0;
 
     while (slen > 0) {
 	if (*s == '\'' || *s == '\\')
@@ -109,9 +197,9 @@ num_q(register const char *s, register S
 /* slen number of characters in s will be escaped */
 /* destination must be long enough for additional chars */
 static I32
-esc_q(register char *d, register const char *s, register STRLEN slen)
+esc_q(char *d, const char *s, STRLEN slen)
 {
-    register I32 ret = 0;
+    I32 ret = 0;
 
     while (slen > 0) {
 	switch (*s) {
@@ -119,6 +207,7 @@ esc_q(register char *d, register const c
 	case '\\':
 	    *d = '\\';
 	    ++d; ++ret;
+            /* FALLTHROUGH */
 	default:
 	    *d = *s;
 	    ++d; ++s; --slen;
@@ -128,8 +217,9 @@ esc_q(register char *d, register const c
     return ret;
 }
 
+/* this function is also misused for implementing $Useqq */
 static I32
-esc_q_utf8(pTHX_ SV* sv, register const char *src, register STRLEN slen)
+esc_q_utf8(pTHX_ SV* sv, const char *src, STRLEN slen, I32 do_utf8, I32 useqq)
 {
     char *r, *rstart;
     const char *s = src;
@@ -144,14 +234,21 @@ esc_q_utf8(pTHX_ SV* sv, register const
     STRLEN qq_escapables = 0;	/* " $ @ will need a \ in "" strings.  */
     STRLEN normal = 0;
     int increment;
+    UV next;
 
     /* this will need EBCDICification */
-    for (s = src; s < send; s += increment) {
-        const UV k = utf8_to_uvchr_buf((U8*)s, (U8*) send, NULL);
+    for (s = src; s < send; do_utf8 ? s += increment : s++) {
+        const UV k = do_utf8 ? utf8_to_uvchr_buf((U8*)s, (U8*) send, NULL) : *(U8*)s;
 
         /* check for invalid utf8 */
         increment = (k == 0 && *s != '\0') ? 1 : UTF8SKIP(s);
 
+	/* this is only used to check if the next character is an
+	 * ASCII digit, which are invariant, so if the following collects
+	 * a UTF-8 start byte it does no harm
+	 */
+	next = (s + increment >= send ) ? 0 : *(U8*)(s+increment);
+
 #ifdef EBCDIC
 	if (!isprint(k) || k > 256) {
 #else
@@ -165,6 +262,17 @@ esc_q_utf8(pTHX_ SV* sv, register const
                 k <= 0xFFFFFFFF ? 8 : UVSIZE * 4
 #endif
                 );
+#ifndef EBCDIC
+	} else if (useqq &&
+	    /* we can't use the short form like '\0' if followed by a digit */
+                   (((k >= 7 && k <= 10) || k == 12 || k == 13 || k == 27)
+                 || (k < 8 && (next < '0' || next > '9')))) {
+	    grow += 2;
+	} else if (useqq && k <= 31 && (next < '0' || next > '9')) {
+	    grow += 3;
+	} else if (useqq && (k <= 31 || k >= 127)) {
+	    grow += 4;
+#endif
         } else if (k == '\\') {
             backslashes++;
         } else if (k == '\'') {
@@ -175,7 +283,7 @@ esc_q_utf8(pTHX_ SV* sv, register const
             normal++;
         }
     }
-    if (grow) {
+    if (grow || useqq) {
         /* We have something needing hex. 3 is ""\0 */
         sv_grow(sv, cur + 3 + grow + 2*backslashes + single_quotes
 		+ 2*qq_escapables + normal);
@@ -183,8 +291,8 @@ esc_q_utf8(pTHX_ SV* sv, register const
 
         *r++ = '"';
 
-        for (s = src; s < send; s += UTF8SKIP(s)) {
-            const UV k = utf8_to_uvchr_buf((U8*)s, (U8*) send, NULL);
+        for (s = src; s < send; do_utf8 ? s += UTF8SKIP(s) : s++) {
+            const UV k = do_utf8 ? utf8_to_uvchr_buf((U8*)s, (U8*) send, NULL) : *(U8*)s;
 
             if (k == '"' || k == '\\' || k == '$' || k == '@') {
                 *r++ = '\\';
@@ -194,7 +302,44 @@ esc_q_utf8(pTHX_ SV* sv, register const
 #ifdef EBCDIC
 	      if (isprint(k) && k < 256)
 #else
-	      if (k < 0x80)
+	      if (useqq && (k <= 31 || k == 127 || (!do_utf8 && k > 127))) {
+	        bool next_is_digit;
+
+		*r++ = '\\';
+		switch (k) {
+		case 7:  *r++ = 'a'; break;
+		case 8:  *r++ = 'b'; break;
+		case 9:  *r++ = 't'; break;
+		case 10: *r++ = 'n'; break;
+		case 12: *r++ = 'f'; break;
+		case 13: *r++ = 'r'; break;
+		case 27: *r++ = 'e'; break;
+		default:
+		    increment = (k == 0 && *s != '\0') ? 1 : UTF8SKIP(s);
+
+		    /* only ASCII digits matter here, which are invariant,
+		     * since we only encode characters \377 and under, or
+		     * \x177 and under for a unicode string
+		     */
+		    next = (s+increment < send) ? *(U8*)(s+increment) : 0;
+		    next_is_digit = next >= '0' && next <= '9';
+
+		    /* faster than
+		     * r = r + my_sprintf(r, "%o", k);
+		     */
+		    if (k <= 7 && !next_is_digit) {
+			*r++ = (char)k + '0';
+		    } else if (k <= 63 && !next_is_digit) {
+			*r++ = (char)(k>>3) + '0';
+			*r++ = (char)(k&7) + '0';
+		    } else {
+			*r++ = (char)(k>>6) + '0';
+			*r++ = (char)((k&63)>>3) + '0';
+			*r++ = (char)(k&7) + '0';
+		    }
+		}
+	    }
+	    else if (k < 0x80)
 #endif
                 *r++ = (char)k;
             else {
@@ -234,7 +379,7 @@ static SV *
 sv_x(pTHX_ SV *sv, const char *str, STRLEN len, I32 n)
 {
     if (!sv)
-	sv = newSVpvn("", 0);
+	sv = newSVpvs("");
 #ifdef DEBUGGING
     else
 	assert(SvTYPE(sv) >= SVt_PV);
@@ -267,10 +412,11 @@ static I32
 DD_dump(pTHX_ SV *val, const char *name, STRLEN namelen, SV *retval, HV *seenhv,
 	AV *postav, I32 *levelp, I32 indent, SV *pad, SV *xpad,
 	SV *apad, SV *sep, SV *pair, SV *freezer, SV *toaster, I32 purity,
-	I32 deepcopy, I32 quotekeys, SV *bless, I32 maxdepth, SV *sortkeys)
+	I32 deepcopy, I32 quotekeys, SV *bless, I32 maxdepth, SV *sortkeys,
+        int use_sparse_seen_hash, I32 useqq, IV maxrecurse)
 {
     char tmpbuf[128];
-    U32 i;
+    Size_t i;
     char *c, *r, *realpack;
 #ifdef DD_USE_OLD_ID_FORMAT
     char id[128];
@@ -317,7 +463,7 @@ DD_dump(pTHX_ SV *val, const char *name,
 	{
 	    dSP; ENTER; SAVETMPS; PUSHMARK(sp);
 	    XPUSHs(val); PUTBACK;
-	    i = perl_call_method(SvPVX_const(freezer), G_EVAL|G_VOID);
+	    i = perl_call_method(SvPVX_const(freezer), G_EVAL|G_VOID|G_DISCARD);
 	    SPAGAIN;
 	    if (SvTRUE(ERRSV))
 		warn("WARNING(Freezer method call failed): %"SVf"", ERRSV);
@@ -352,13 +498,13 @@ DD_dump(pTHX_ SV *val, const char *name,
 			SV *postentry;
 			
 			if (realtype == SVt_PVHV)
-			    sv_catpvn(retval, "{}", 2);
+			    sv_catpvs(retval, "{}");
 			else if (realtype == SVt_PVAV)
-			    sv_catpvn(retval, "[]", 2);
+			    sv_catpvs(retval, "[]");
 			else
-			    sv_catpvn(retval, "do{my $o}", 9);
+			    sv_catpvs(retval, "do{my $o}");
 			postentry = newSVpvn(name, namelen);
-			sv_catpvn(postentry, " = ", 3);
+			sv_catpvs(postentry, " = ");
 			sv_catsv(postentry, othername);
 			av_push(postav, postentry);
 		    }
@@ -371,9 +517,9 @@ DD_dump(pTHX_ SV *val, const char *name,
 			    }
 			    else {
 				sv_catpvn(retval, name, 1);
-				sv_catpvn(retval, "{", 1);
+				sv_catpvs(retval, "{");
 				sv_catsv(retval, othername);
-				sv_catpvn(retval, "}", 1);
+				sv_catpvs(retval, "}");
 			    }
 			}
 			else
@@ -393,11 +539,11 @@ DD_dump(pTHX_ SV *val, const char *name,
 	    else {   /* store our name and continue */
 		SV *namesv;
 		if (name[0] == '@' || name[0] == '%') {
-		    namesv = newSVpvn("\\", 1);
+		    namesv = newSVpvs("\\");
 		    sv_catpvn(namesv, name, namelen);
 		}
 		else if (realtype == SVt_PVCV && name[0] == '*') {
-		    namesv = newSVpvn("\\", 2);
+		    namesv = newSVpvs("\\");
 		    sv_catpvn(namesv, name, namelen);
 		    (SvPVX(namesv))[1] = '&';
 		}
@@ -438,17 +584,21 @@ DD_dump(pTHX_ SV *val, const char *name,
 	if (!purity && maxdepth > 0 && *levelp >= maxdepth) {
 	    STRLEN vallen;
 	    const char * const valstr = SvPV(val,vallen);
-	    sv_catpvn(retval, "'", 1);
+	    sv_catpvs(retval, "'");
 	    sv_catpvn(retval, valstr, vallen);
-	    sv_catpvn(retval, "'", 1);
+	    sv_catpvs(retval, "'");
 	    return 1;
 	}
 
+	if (maxrecurse > 0 && *levelp >= maxrecurse) {
+	    croak("Recursion limit of %" IVdf " exceeded", maxrecurse);
+	}
+
 	if (realpack && !no_bless) {				/* we have a blessed ref */
 	    STRLEN blesslen;
 	    const char * const blessstr = SvPV(bless, blesslen);
 	    sv_catpvn(retval, blessstr, blesslen);
-	    sv_catpvn(retval, "( ", 2);
+	    sv_catpvs(retval, "( ");
 	    if (indent >= 2) {
 		blesspad = apad;
 		apad = newSVsv(apad);
@@ -462,21 +612,58 @@ DD_dump(pTHX_ SV *val, const char *name,
         if (is_regex) 
         {
             STRLEN rlen;
-	    const char *rval = SvPV(val, rlen);
-	    const char * const rend = rval+rlen;
-	    const char *slash = rval;
-	    sv_catpvn(retval, "qr/", 3);
+	    SV *sv_pattern = NULL;
+	    SV *sv_flags = NULL;
+	    CV *re_pattern_cv;
+	    const char *rval;
+	    const char *rend;
+	    const char *slash;
+
+	    if ((re_pattern_cv = get_cv("re::regexp_pattern", 0))) {
+	      dSP;
+	      I32 count;
+	      ENTER;
+	      SAVETMPS;
+	      PUSHMARK(SP);
+	      XPUSHs(val);
+	      PUTBACK;
+	      count = call_sv((SV*)re_pattern_cv, G_ARRAY);
+	      SPAGAIN;
+	      if (count >= 2) {
+		sv_flags = POPs;
+	        sv_pattern = POPs;
+		SvREFCNT_inc(sv_flags);
+		SvREFCNT_inc(sv_pattern);
+	      }
+	      PUTBACK;
+	      FREETMPS;
+	      LEAVE;
+	      if (sv_pattern) {
+	        sv_2mortal(sv_pattern);
+	        sv_2mortal(sv_flags);
+	      }
+	    }
+	    else {
+	      sv_pattern = val;
+	    }
+	    assert(sv_pattern);
+	    rval = SvPV(sv_pattern, rlen);
+	    rend = rval+rlen;
+	    slash = rval;
+	    sv_catpvs(retval, "qr/");
 	    for (;slash < rend; slash++) {
 	      if (*slash == '\\') { ++slash; continue; }
 	      if (*slash == '/') {    
 		sv_catpvn(retval, rval, slash-rval);
-		sv_catpvn(retval, "\\/", 2);
+		sv_catpvs(retval, "\\/");
 		rlen -= slash-rval+1;
 		rval = slash+1;
 	      }
 	    }
 	    sv_catpvn(retval, rval, rlen);
-	    sv_catpvn(retval, "/", 1);
+	    sv_catpvs(retval, "/");
+	    if (sv_flags)
+	      sv_catsv(retval, sv_flags);
 	} 
         else if (
 #if PERL_VERSION < 9
@@ -485,41 +672,44 @@ DD_dump(pTHX_ SV *val, const char *name,
 		realtype <= SVt_PVMG
 #endif
 	) {			     /* scalar ref */
-	    SV * const namesv = newSVpvn("${", 2);
+	    SV * const namesv = newSVpvs("${");
 	    sv_catpvn(namesv, name, namelen);
-	    sv_catpvn(namesv, "}", 1);
+	    sv_catpvs(namesv, "}");
 	    if (realpack) {				     /* blessed */
-		sv_catpvn(retval, "do{\\(my $o = ", 13);
+		sv_catpvs(retval, "do{\\(my $o = ");
 		DD_dump(aTHX_ ival, SvPVX_const(namesv), SvCUR(namesv), retval, seenhv,
 			postav, levelp,	indent, pad, xpad, apad, sep, pair,
 			freezer, toaster, purity, deepcopy, quotekeys, bless,
-			maxdepth, sortkeys);
-		sv_catpvn(retval, ")}", 2);
+			maxdepth, sortkeys, use_sparse_seen_hash, useqq,
+			maxrecurse);
+		sv_catpvs(retval, ")}");
 	    }						     /* plain */
 	    else {
-		sv_catpvn(retval, "\\", 1);
+		sv_catpvs(retval, "\\");
 		DD_dump(aTHX_ ival, SvPVX_const(namesv), SvCUR(namesv), retval, seenhv,
 			postav, levelp,	indent, pad, xpad, apad, sep, pair,
 			freezer, toaster, purity, deepcopy, quotekeys, bless,
-			maxdepth, sortkeys);
+			maxdepth, sortkeys, use_sparse_seen_hash, useqq,
+			maxrecurse);
 	    }
 	    SvREFCNT_dec(namesv);
 	}
 	else if (realtype == SVt_PVGV) {		     /* glob ref */
-	    SV * const namesv = newSVpvn("*{", 2);
+	    SV * const namesv = newSVpvs("*{");
 	    sv_catpvn(namesv, name, namelen);
-	    sv_catpvn(namesv, "}", 1);
-	    sv_catpvn(retval, "\\", 1);
+	    sv_catpvs(namesv, "}");
+	    sv_catpvs(retval, "\\");
 	    DD_dump(aTHX_ ival, SvPVX_const(namesv), SvCUR(namesv), retval, seenhv,
 		    postav, levelp,	indent, pad, xpad, apad, sep, pair,
 		    freezer, toaster, purity, deepcopy, quotekeys, bless,
-		    maxdepth, sortkeys);
+		    maxdepth, sortkeys, use_sparse_seen_hash, useqq,
+		    maxrecurse);
 	    SvREFCNT_dec(namesv);
 	}
 	else if (realtype == SVt_PVAV) {
 	    SV *totpad;
-	    I32 ix = 0;
-	    const I32 ixmax = av_len((AV *)ival);
+	    SSize_t ix = 0;
+	    const SSize_t ixmax = av_len((AV *)ival);
 	
 	    SV * const ixsv = newSViv(0);
 	    /* allowing for a 24 char wide array index */
@@ -527,11 +717,11 @@ DD_dump(pTHX_ SV *val, const char *name,
 	    (void)strcpy(iname, name);
 	    inamelen = namelen;
 	    if (name[0] == '@') {
-		sv_catpvn(retval, "(", 1);
+		sv_catpvs(retval, "(");
 		iname[0] = '$';
 	    }
 	    else {
-		sv_catpvn(retval, "[", 1);
+		sv_catpvs(retval, "[");
 		/* omit "->" in $foo{bar}->[0], but not in ${$foo}->[0] */
 		/*if (namelen > 0
 		    && name[namelen-1] != ']' && name[namelen-1] != '}'
@@ -578,7 +768,7 @@ DD_dump(pTHX_ SV *val, const char *name,
 		if (indent >= 3) {
 		    sv_catsv(retval, totpad);
 		    sv_catsv(retval, ipad);
-		    sv_catpvn(retval, "#", 1);
+		    sv_catpvs(retval, "#");
 		    sv_catsv(retval, ixsv);
 		}
 		sv_catsv(retval, totpad);
@@ -586,9 +776,10 @@ DD_dump(pTHX_ SV *val, const char *name,
 		DD_dump(aTHX_ elem, iname, ilen, retval, seenhv, postav,
 			levelp,	indent, pad, xpad, apad, sep, pair,
 			freezer, toaster, purity, deepcopy, quotekeys, bless,
-			maxdepth, sortkeys);
+			maxdepth, sortkeys, use_sparse_seen_hash,
+			useqq, maxrecurse);
 		if (ix < ixmax)
-		    sv_catpvn(retval, ",", 1);
+		    sv_catpvs(retval, ",");
 	    }
 	    if (ixmax >= 0) {
 		SV * const opad = sv_x(aTHX_ Nullsv, SvPVX_const(xpad), SvCUR(xpad), (*levelp)-1);
@@ -597,9 +788,9 @@ DD_dump(pTHX_ SV *val, const char *name,
 		SvREFCNT_dec(opad);
 	    }
 	    if (name[0] == '@')
-		sv_catpvn(retval, ")", 1);
+		sv_catpvs(retval, ")");
 	    else
-		sv_catpvn(retval, "]", 1);
+		sv_catpvs(retval, "]");
 	    SvREFCNT_dec(ixsv);
 	    SvREFCNT_dec(totpad);
 	    Safefree(iname);
@@ -615,11 +806,11 @@ DD_dump(pTHX_ SV *val, const char *name,
 	
 	    SV * const iname = newSVpvn(name, namelen);
 	    if (name[0] == '%') {
-		sv_catpvn(retval, "(", 1);
+		sv_catpvs(retval, "(");
 		(SvPVX(iname))[0] = '$';
 	    }
 	    else {
-		sv_catpvn(retval, "{", 1);
+		sv_catpvs(retval, "{");
 		/* omit "->" in $foo[0]->{bar}, but not in ${$foo}->{bar} */
 		if ((namelen > 0
 		     && name[namelen-1] != ']' && name[namelen-1] != '}')
@@ -627,16 +818,16 @@ DD_dump(pTHX_ SV *val, const char *name,
 		        && (name[1] == '{'
 			    || (name[0] == '\\' && name[2] == '{'))))
 		{
-		    sv_catpvn(iname, "->", 2);
+		    sv_catpvs(iname, "->");
 		}
 	    }
 	    if (name[0] == '*' && name[namelen-1] == '}' && namelen >= 8 &&
 		(instr(name+namelen-8, "{SCALAR}") ||
 		 instr(name+namelen-7, "{ARRAY}") ||
 		 instr(name+namelen-6, "{HASH}"))) {
-		sv_catpvn(iname, "->", 2);
+		sv_catpvs(iname, "->");
 	    }
-	    sv_catpvn(iname, "{", 1);
+	    sv_catpvs(iname, "{");
 	    totpad = newSVsv(sep);
 	    sv_catsv(totpad, pad);
 	    sv_catsv(totpad, apad);
@@ -645,7 +836,7 @@ DD_dump(pTHX_ SV *val, const char *name,
 	    if (sortkeys) {
 		if (sortkeys == &PL_sv_yes) {
 #if PERL_VERSION < 8
-                    sortkeys = sv_2mortal(newSVpvn("Data::Dumper::_sortkeys", 23));
+                    sortkeys = sv_2mortal(newSVpvs("Data::Dumper::_sortkeys"));
 #else
 		    keys = newAV();
 		    (void)hv_iterinit((HV*)ival);
@@ -654,16 +845,25 @@ DD_dump(pTHX_ SV *val, const char *name,
 			(void)SvREFCNT_inc(sv);
 			av_push(keys, sv);
 		    }
-# ifdef USE_LOCALE_NUMERIC
-		    sortsv(AvARRAY(keys), 
-			   av_len(keys)+1, 
-			   IN_LOCALE ? Perl_sv_cmp_locale : Perl_sv_cmp);
-# else
-		    sortsv(AvARRAY(keys), 
-			   av_len(keys)+1, 
-			   Perl_sv_cmp);
+# ifdef USE_LOCALE_COLLATE
+#       ifdef IN_LC     /* Use this if available */
+                    if (IN_LC(LC_COLLATE))
+#       else
+                    if (IN_LOCALE)
+#       endif
+                    {
+                        sortsv(AvARRAY(keys),
+			   av_len(keys)+1,
+                           Perl_sv_cmp_locale);
+                    }
+                    else
 # endif
 #endif
+                    {
+                        sortsv(AvARRAY(keys),
+			   av_len(keys)+1,
+                           Perl_sv_cmp);
+                    }
 		}
 		if (sortkeys != &PL_sv_yes) {
 		    dSP; ENTER; SAVETMPS; PUSHMARK(sp);
@@ -696,13 +896,13 @@ DD_dump(pTHX_ SV *val, const char *name,
 		bool do_utf8 = FALSE;
 
                if (sortkeys) {
-                   if (!(keys && (I32)i <= av_len(keys))) break;
+                   if (!(keys && (SSize_t)i <= av_len(keys))) break;
                } else {
                    if (!(entry = hv_iternext((HV *)ival))) break;
                }
 
 		if (i)
-		    sv_catpvn(retval, ",", 1);
+		    sv_catpvs(retval, ",");
 
 		if (sortkeys) {
 		    char *key;
@@ -724,31 +924,27 @@ DD_dump(pTHX_ SV *val, const char *name,
 
                 sv_catsv(retval, totpad);
                 sv_catsv(retval, ipad);
-                /* old logic was first to check utf8 flag, and if utf8 always
+                /* The (very)
+                   old logic was first to check utf8 flag, and if utf8 always
                    call esc_q_utf8.  This caused test to break under -Mutf8,
                    because there even strings like 'c' have utf8 flag on.
                    Hence with quotekeys == 0 the XS code would still '' quote
                    them based on flags, whereas the perl code would not,
                    based on regexps.
-                   The perl code is correct.
-                   needs_quote() decides that anything that isn't a valid
-                   perl identifier needs to be quoted, hence only correctly
-                   formed strings with no characters outside [A-Za-z0-9_:]
-                   won't need quoting.  None of those characters are used in
-                   the byte encoding of utf8, so anything with utf8
-                   encoded characters in will need quoting. Hence strings
-                   with utf8 encoded characters in will end up inside do_utf8
-                   just like before, but now strings with utf8 flag set but
-                   only ascii characters will end up in the unquoted section.
-
-                   There should also be less tests for the (probably currently)
-                   more common doesn't need quoting case.
-                   The code is also smaller (22044 vs 22260) because I've been
-                   able to pull the common logic out to both sides.  */
-                if (quotekeys || needs_quote(key,keylen)) {
-                    if (do_utf8) {
+
+                   The old logic checked that the string was a valid
+                   perl glob name (foo::bar), which isn't safe under
+                   strict, and differs from the perl code which only
+                   accepts simple identifiers.
+
+                   With the fix for [perl #120384] I chose to make
+                   their handling of key quoting compatible between XS
+                   and perl.
+                 */
+                if (quotekeys || key_needs_quote(key,keylen)) {
+                    if (do_utf8 || useqq) {
                         STRLEN ocur = SvCUR(retval);
-                        nlen = esc_q_utf8(aTHX_ retval, key, klen);
+                        nlen = esc_q_utf8(aTHX_ retval, key, klen, do_utf8, useqq);
                         nkey = SvPVX(retval) + ocur;
                     }
                     else {
@@ -773,7 +969,7 @@ DD_dump(pTHX_ SV *val, const char *name,
 		}
                 sname = newSVsv(iname);
                 sv_catpvn(sname, nkey, nlen);
-                sv_catpvn(sname, "}", 1);
+                sv_catpvs(sname, "}");
 
 		sv_catsv(retval, pair);
 		if (indent >= 2) {
@@ -793,7 +989,8 @@ DD_dump(pTHX_ SV *val, const char *name,
 		DD_dump(aTHX_ hval, SvPVX_const(sname), SvCUR(sname), retval, seenhv,
 			postav, levelp,	indent, pad, xpad, newapad, sep, pair,
 			freezer, toaster, purity, deepcopy, quotekeys, bless,
-			maxdepth, sortkeys);
+			maxdepth, sortkeys, use_sparse_seen_hash, useqq,
+			maxrecurse);
 		SvREFCNT_dec(sname);
 		Safefree(nkey_buffer);
 		if (indent >= 2)
@@ -806,14 +1003,14 @@ DD_dump(pTHX_ SV *val, const char *name,
 		SvREFCNT_dec(opad);
 	    }
 	    if (name[0] == '%')
-		sv_catpvn(retval, ")", 1);
+		sv_catpvs(retval, ")");
 	    else
-		sv_catpvn(retval, "}", 1);
+		sv_catpvs(retval, "}");
 	    SvREFCNT_dec(iname);
 	    SvREFCNT_dec(totpad);
 	}
 	else if (realtype == SVt_PVCV) {
-	    sv_catpvn(retval, "sub { \"DUMMY\" }", 15);
+	    sv_catpvs(retval, "sub { \"DUMMY\" }");
 	    if (purity)
 		warn("Encountered CODE ref, using dummy placeholder");
 	}
@@ -829,7 +1026,7 @@ DD_dump(pTHX_ SV *val, const char *name,
 		SvREFCNT_dec(apad);
 		apad = blesspad;
 	    }
-	    sv_catpvn(retval, ", '", 3);
+	    sv_catpvs(retval, ", '");
 
 	    plen = strlen(realpack);
 	    pticks = num_q(realpack, plen);
@@ -848,11 +1045,11 @@ DD_dump(pTHX_ SV *val, const char *name,
 	    else {
 	        sv_catpvn(retval, realpack, strlen(realpack));
 	    }
-	    sv_catpvn(retval, "' )", 3);
+	    sv_catpvs(retval, "' )");
 	    if (toaster && SvPOK(toaster) && SvCUR(toaster)) {
-		sv_catpvn(retval, "->", 2);
+		sv_catpvs(retval, "->");
 		sv_catsv(retval, toaster);
-		sv_catpvn(retval, "()", 2);
+		sv_catpvs(retval, "()");
 	    }
 	}
 	SvREFCNT_dec(ipad);
@@ -877,14 +1074,21 @@ DD_dump(pTHX_ SV *val, const char *name,
 		if ((svp = av_fetch(seenentry, 0, FALSE)) && (othername = *svp)
 		    && (svp = av_fetch(seenentry, 2, FALSE)) && *svp && SvIV(*svp) > 0)
 		{
-		    sv_catpvn(retval, "${", 2);
+		    sv_catpvs(retval, "${");
 		    sv_catsv(retval, othername);
-		    sv_catpvn(retval, "}", 1);
+		    sv_catpvs(retval, "}");
 		    return 1;
 		}
 	    }
-	    else if (val != &PL_sv_undef) {
-		SV * const namesv = newSVpvn("\\", 1);
+            /* If we're allowed to keep only a sparse "seen" hash
+             * (IOW, the user does not expect it to contain everything
+             * after the dump, then only store in seen hash if the SV
+             * ref count is larger than 1. If it's 1, then we know that
+             * there is no other reference, duh. This is an optimization.
+             * Note that we'd have to check for weak-refs, too, but this is
+             * already the branch for non-refs only. */
+	    else if (val != &PL_sv_undef && (!use_sparse_seen_hash || SvREFCNT(val) > 1)) {
+		SV * const namesv = newSVpvs("\\");
 		sv_catpvn(namesv, name, namelen);
 		seenentry = newAV();
 		av_push(seenentry, namesv);
@@ -928,14 +1132,14 @@ DD_dump(pTHX_ SV *val, const char *name,
 #endif
 		    i = 0; else i -= 4;
 	    }
-	    if (needs_quote(c,i)) {
+            if (globname_needs_quote(c,i)) {
 #ifdef GvNAMEUTF8
 	      if (GvNAMEUTF8(val)) {
 		sv_grow(retval, SvCUR(retval)+2);
 		r = SvPVX(retval)+SvCUR(retval);
 		r[0] = '*'; r[1] = '{';
 		SvCUR_set(retval, SvCUR(retval)+2);
-		esc_q_utf8(aTHX_ retval, c, i);
+		esc_q_utf8(aTHX_ retval, c, i, 1, useqq);
 		sv_grow(retval, SvCUR(retval)+2);
 		r = SvPVX(retval)+SvCUR(retval);
 		r[0] = '}'; r[1] = '\0';
@@ -965,8 +1169,8 @@ DD_dump(pTHX_ SV *val, const char *name,
 		static const char* const entries[] = { "{SCALAR}", "{ARRAY}", "{HASH}" };
 		static const STRLEN sizes[] = { 8, 7, 6 };
 		SV *e;
-		SV * const nname = newSVpvn("", 0);
-		SV * const newapad = newSVpvn("", 0);
+		SV * const nname = newSVpvs("");
+		SV * const newapad = newSVpvs("");
 		GV * const gv = (GV*)val;
 		I32 j;
 		
@@ -983,7 +1187,7 @@ DD_dump(pTHX_ SV *val, const char *name,
 			
 			sv_setsv(nname, postentry);
 			sv_catpvn(nname, entries[j], sizes[j]);
-			sv_catpvn(postentry, " = ", 3);
+			sv_catpvs(postentry, " = ");
 			av_push(postav, postentry);
 			e = newRV_inc(e);
 			
@@ -995,7 +1199,8 @@ DD_dump(pTHX_ SV *val, const char *name,
 				seenhv, postav, &nlevel, indent, pad, xpad,
 				newapad, sep, pair, freezer, toaster, purity,
 				deepcopy, quotekeys, bless, maxdepth, 
-				sortkeys);
+				sortkeys, use_sparse_seen_hash, useqq,
+				maxrecurse);
 			SvREFCNT_dec(e);
 		    }
 		}
@@ -1005,11 +1210,11 @@ DD_dump(pTHX_ SV *val, const char *name,
 	    }
 	}
 	else if (val == &PL_sv_undef || !SvOK(val)) {
-	    sv_catpvn(retval, "undef", 5);
+	    sv_catpvs(retval, "undef");
 	}
 #ifdef SvVOK
 	else if (SvMAGICAL(val) && (mg = mg_find(val, 'V'))) {
-# ifndef PL_vtbl_vstring
+# if !defined(PL_vtbl_vstring) && PERL_VERSION < 17
 	    SV * const vecsv = sv_newmortal();
 #  if PERL_VERSION < 10
 	    scan_vstring(mg->mg_ptr, vecsv);
@@ -1021,11 +1226,20 @@ DD_dump(pTHX_ SV *val, const char *name,
 	    sv_catpvn(retval, (const char *)mg->mg_ptr, mg->mg_len);
 	}
 #endif
+
 	else {
         integer_came_from_string:
-	    c = SvPV(val, i);
-	    if (DO_UTF8(val))
-	        i += esc_q_utf8(aTHX_ retval, c, i);
+            c = SvPV(val, i);
+            /* the pure perl and XS non-qq outputs have historically been
+             * different in this case, but for useqq, let's try to match
+             * the pure perl code.
+             * see [perl #74798]
+             */
+            if (useqq && safe_decimal_number(c, i)) {
+                sv_catsv(retval, val);
+            }
+	    else if (DO_UTF8(val) || useqq)
+	        i += esc_q_utf8(aTHX_ retval, c, i, DO_UTF8(val), useqq);
 	    else {
 		sv_grow(retval, SvCUR(retval)+3+2*i); /* 3: ""\0 */
 		r = SvPVX(retval) + SvCUR(retval);
@@ -1056,7 +1270,7 @@ MODULE = Data::Dumper		PACKAGE = Data::D
 #
 # This is the exact equivalent of Dump.  Well, almost. The things that are
 # different as of now (due to Laziness):
-#   * doesn't do double-quotes yet.
+#   * doesn't deparse yet.'
 #
 
 void
@@ -1070,13 +1284,16 @@ Data_Dumper_Dumpxs(href, ...)
 	    HV *seenhv = NULL;
 	    AV *postav, *todumpav, *namesav;
 	    I32 level = 0;
-	    I32 indent, terse, i, imax, postlen;
+	    I32 indent, terse, useqq;
+	    SSize_t i, imax, postlen;
 	    SV **svp;
 	    SV *val, *name, *pad, *xpad, *apad, *sep, *pair, *varname;
 	    SV *freezer, *toaster, *bless, *sortkeys;
 	    I32 purity, deepcopy, quotekeys, maxdepth = 0;
+	    IV maxrecurse = 1000;
 	    char tmpbuf[1024];
 	    I32 gimme = GIMME;
+            int use_sparse_seen_hash = 0;
 
 	    if (!SvROK(href)) {		/* call new to get an object first */
 		if (items < 2)
@@ -1086,10 +1303,11 @@ Data_Dumper_Dumpxs(href, ...)
 		SAVETMPS;
 		
 		PUSHMARK(sp);
-		XPUSHs(href);
-		XPUSHs(sv_2mortal(newSVsv(ST(1))));
+                EXTEND(SP, 3); /* 3 == max of all branches below */
+		PUSHs(href);
+		PUSHs(sv_2mortal(newSVsv(ST(1))));
 		if (items >= 3)
-		    XPUSHs(sv_2mortal(newSVsv(ST(2))));
+		    PUSHs(sv_2mortal(newSVsv(ST(2))));
 		PUTBACK;
 		i = perl_call_method("new", G_SCALAR);
 		SPAGAIN;
@@ -1109,16 +1327,20 @@ Data_Dumper_Dumpxs(href, ...)
 		= freezer = toaster = bless = sortkeys = &PL_sv_undef;
 	    name = sv_newmortal();
 	    indent = 2;
-	    terse = purity = deepcopy = 0;
+	    terse = purity = deepcopy = useqq = 0;
 	    quotekeys = 1;
 	
-	    retval = newSVpvn("", 0);
+	    retval = newSVpvs("");
 	    if (SvROK(href)
 		&& (hv = (HV*)SvRV((SV*)href))
 		&& SvTYPE(hv) == SVt_PVHV)		{
 
 		if ((svp = hv_fetch(hv, "seen", 4, FALSE)) && SvROK(*svp))
 		    seenhv = (HV*)SvRV(*svp);
+                else
+                    use_sparse_seen_hash = 1;
+		if ((svp = hv_fetch(hv, "noseen", 6, FALSE)))
+		    use_sparse_seen_hash = (SvOK(*svp) && SvIV(*svp) != 0);
 		if ((svp = hv_fetch(hv, "todump", 6, FALSE)) && SvROK(*svp))
 		    todumpav = (AV*)SvRV(*svp);
 		if ((svp = hv_fetch(hv, "names", 5, FALSE)) && SvROK(*svp))
@@ -1129,10 +1351,8 @@ Data_Dumper_Dumpxs(href, ...)
 		    purity = SvIV(*svp);
 		if ((svp = hv_fetch(hv, "terse", 5, FALSE)))
 		    terse = SvTRUE(*svp);
-#if 0 /* useqq currently unused */
 		if ((svp = hv_fetch(hv, "useqq", 5, FALSE)))
 		    useqq = SvTRUE(*svp);
-#endif
 		if ((svp = hv_fetch(hv, "pad", 3, FALSE)))
 		    pad = *svp;
 		if ((svp = hv_fetch(hv, "xpad", 4, FALSE)))
@@ -1157,6 +1377,8 @@ Data_Dumper_Dumpxs(href, ...)
 		    bless = *svp;
 		if ((svp = hv_fetch(hv, "maxdepth", 8, FALSE)))
 		    maxdepth = SvIV(*svp);
+		if ((svp = hv_fetch(hv, "maxrecurse", 10, FALSE)))
+		    maxrecurse = SvIV(*svp);
 		if ((svp = hv_fetch(hv, "sortkeys", 8, FALSE))) {
 		    sortkeys = *svp;
 		    if (! SvTRUE(sortkeys))
@@ -1174,7 +1396,7 @@ Data_Dumper_Dumpxs(href, ...)
 		    imax = av_len(todumpav);
 		else
 		    imax = -1;
-		valstr = newSVpvn("",0);
+		valstr = newSVpvs("");
 		for (i = 0; i <= imax; ++i) {
 		    SV *newapad;
 		
@@ -1236,7 +1458,8 @@ Data_Dumper_Dumpxs(href, ...)
 		    DD_dump(aTHX_ val, SvPVX_const(name), SvCUR(name), valstr, seenhv,
 			    postav, &level, indent, pad, xpad, newapad, sep, pair,
 			    freezer, toaster, purity, deepcopy, quotekeys,
-			    bless, maxdepth, sortkeys);
+			    bless, maxdepth, sortkeys, use_sparse_seen_hash,
+			    useqq, maxrecurse);
 		    SPAGAIN;
 		
 		    if (indent >= 2 && !terse)
@@ -1246,13 +1469,13 @@ Data_Dumper_Dumpxs(href, ...)
 		    if (postlen >= 0 || !terse) {
 			sv_insert(valstr, 0, 0, " = ", 3);
 			sv_insert(valstr, 0, 0, SvPVX_const(name), SvCUR(name));
-			sv_catpvn(valstr, ";", 1);
+			sv_catpvs(valstr, ";");
 		    }
 		    sv_catsv(retval, pad);
 		    sv_catsv(retval, valstr);
 		    sv_catsv(retval, sep);
 		    if (postlen >= 0) {
-			I32 i;
+			SSize_t i;
 			sv_catsv(retval, pad);
 			for (i = 0; i <= postlen; ++i) {
 			    SV *elem;
@@ -1260,20 +1483,20 @@ Data_Dumper_Dumpxs(href, ...)
 			    if (svp && (elem = *svp)) {
 				sv_catsv(retval, elem);
 				if (i < postlen) {
-				    sv_catpvn(retval, ";", 1);
+				    sv_catpvs(retval, ";");
 				    sv_catsv(retval, sep);
 				    sv_catsv(retval, pad);
 				}
 			    }
 			}
-			sv_catpvn(retval, ";", 1);
+			sv_catpvs(retval, ";");
 			    sv_catsv(retval, sep);
 		    }
 		    sv_setpvn(valstr, "", 0);
 		    if (gimme == G_ARRAY) {
 			XPUSHs(sv_2mortal(retval));
 			if (i < imax)	/* not the last time thro ? */
-			    retval = newSVpvn("",0);
+			    retval = newSVpvs("");
 		    }
 		}
 		SvREFCNT_dec(postav);
diff -uNrp perl-5.16.3.orig/dist/Data-Dumper/t/recurse.t perl-5.16.3/dist/Data-Dumper/t/recurse.t
--- perl-5.16.3.orig/dist/Data-Dumper/t/recurse.t	1969-12-31 19:00:00.000000000 -0500
+++ perl-5.16.3/dist/Data-Dumper/t/recurse.t	2014-10-06 15:01:35.444960100 -0400
@@ -0,0 +1,45 @@
+#!perl
+
+# Test the Maxrecurse option
+
+use strict;
+use Test::More tests => 32;
+use Data::Dumper;
+
+SKIP: {
+    skip "no XS available", 16
+      if $Data::Dumper::Useperl;
+    local $Data::Dumper::Useperl = 1;
+    test_recursion();
+}
+
+test_recursion();
+
+sub test_recursion {
+    my $pp = $Data::Dumper::Useperl ? "pure perl" : "XS";
+    $Data::Dumper::Purity = 1; # make sure this has no effect
+    $Data::Dumper::Indent = 0;
+    $Data::Dumper::Maxrecurse = 1;
+    is(eval { Dumper([]) }, '$VAR1 = [];', "$pp: maxrecurse 1, []");
+    is(eval { Dumper([[]]) }, undef, "$pp: maxrecurse 1, [[]]");
+    ok($@, "exception thrown");
+    is(eval { Dumper({}) }, '$VAR1 = {};', "$pp: maxrecurse 1, {}");
+    is(eval { Dumper({ a => 1 }) }, q($VAR1 = {'a' => 1};),
+       "$pp: maxrecurse 1, { a => 1 }");
+    is(eval { Dumper({ a => {} }) }, undef, "$pp: maxrecurse 1, { a => {} }");
+    ok($@, "exception thrown");
+    is(eval { Dumper(\1) }, "\$VAR1 = \\1;", "$pp: maxrecurse 1, \\1");
+    is(eval { Dumper(\\1) }, undef, "$pp: maxrecurse 1, \\1");
+    ok($@, "exception thrown");
+    $Data::Dumper::Maxrecurse = 3;
+    is(eval { Dumper(\1) }, "\$VAR1 = \\1;", "$pp: maxrecurse 3, \\1");
+    is(eval { Dumper(\(my $s = {})) }, "\$VAR1 = \\{};", "$pp: maxrecurse 3, \\{}");
+    is(eval { Dumper(\(my $s = { a => [] })) }, "\$VAR1 = \\{'a' => []};",
+       "$pp: maxrecurse 3, \\{ a => [] }");
+    is(eval { Dumper(\(my $s = { a => [{}] })) }, undef,
+       "$pp: maxrecurse 3, \\{ a => [{}] }");
+    ok($@, "exception thrown");
+    $Data::Dumper::Maxrecurse = 0;
+    is(eval { Dumper([[[[[]]]]]) }, q($VAR1 = [[[[[]]]]];),
+       "$pp: check Maxrecurse doesn't set limit to 0 recursion");
+}
diff -uNrp perl-5.16.3.orig/MANIFEST perl-5.16.3/MANIFEST
--- perl-5.16.3.orig/MANIFEST	2013-03-04 10:16:21.000000000 -0500
+++ perl-5.16.3/MANIFEST	2014-10-06 15:07:21.676221279 -0400
@@ -3079,6 +3079,7 @@ dist/Data-Dumper/t/overload.t	See if Dat
 dist/Data-Dumper/t/pair.t	See if Data::Dumper pair separator works
 dist/Data-Dumper/t/perl-74170.t	Regression test for stack reallocation
 dist/Data-Dumper/t/qr.t		See if Data::Dumper works with qr|/|
+dist/Data-Dumper/t/recurse.t	See if Data::Dumper::Maxrecurse works
 dist/Data-Dumper/t/terse.t	See if Data::Dumper terse option works
 dist/Devel-SelfStubber/lib/Devel/SelfStubber.pm	Generate stubs for SelfLoader.pm
 dist/Devel-SelfStubber/t/Devel-SelfStubber.t	See if Devel::SelfStubber works