The following invalid code snippet triggers an ICE on the 4.2 branch and mainline:
=================================================== struct A { typedef int X; }; struct __attribute__((unused)) A::X; =================================================== bug.cc:3: error: using typedef-name 'A::X' after 'struct' bug.cc:1: error: 'A::X' has a previous declaration here bug.cc:3: internal compiler error: Segmentation fault Please submit a full bug report, [etc.] -- Summary: [4.2/4.3 regression] ICE using attribute in invalid declaration Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code, error-recovery, monitored Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: reichelt at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29980