File "a.ml", line 1, column 5, error: illegal redefinition of type "int"
File "a.ml", line 3, column 5, error: illegal redefinition of type "float"
File "a.ml", line 6, column 7, error: illegal redefinition of type "bool"
File "a.ml", line 9, column 5, error: illegal redefinition of type "char"