diff -rupN openjpeg-1.5.2/libopenjpeg/j2k.c openjpeg-1.5.2-new/libopenjpeg/j2k.c --- openjpeg-1.5.2/libopenjpeg/j2k.c 2014-03-27 11:58:08.000000000 +0100 +++ openjpeg-1.5.2-new/libopenjpeg/j2k.c 2014-04-03 23:50:50.678143002 +0200 @@ -1712,8 +1712,11 @@ static void j2k_read_eoc(opj_j2k_t *j2k) else { for (i = 0; i < j2k->cp->tileno_size; i++) { tileno = j2k->cp->tileno[i]; - opj_free(j2k->tile_data[tileno]); - j2k->tile_data[tileno] = NULL; + /* not sure if this can actually happen */ + if (tileno != -1) { + opj_free(j2k->tile_data[tileno]); + j2k->tile_data[tileno] = NULL; + } } } if (j2k->state & J2K_STATE_ERR)