http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54243
Tobias Burnus <burnus at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Keywords| |error-recovery, | |ice-on-invalid-code Last reconfirmed| |2012-08-13 CC| |burnus at gcc dot gnu.org, | |janus at gcc dot gnu.org Ever Confirmed|0 |1 Summary|f951: internal compiler |[OOP] ICE (segfault) in |error: Segmentation fault |gfc_type_compatible for |(trying to compile |invalid BT_CLASS |errorneous code) | --- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-08-13 15:35:11 UTC --- Segfaults in 4837 gfc_type_compatible (gfc_typespec *ts1, gfc_typespec *ts2) 4838 { 4839 bool is_class1 = (ts1->type == BT_CLASS); 4840 bool is_class2 = (ts2->type == BT_CLASS); ... 4853 else if (is_class1 && is_class2) 4854 return gfc_type_is_extension_of (ts1->u.derived->components->ts.u.derived, 4855 ts2->u.derived->components->ts.u.derived); The problem is that ts2->u.derived->components == NULL.