The following invalid code snippet triggers an ICE on mainline (it was wrongly accepted before):
==================== namespace N { } struct N; struct N* p; ==================== bug.cc:2: error: 'struct N' redeclared as different kind of symbol bug.cc:1: error: previous declaration of 'namespace N { }' bug.cc:3: internal compiler error: Segmentation fault Please submit a full bug report, [etc.] -- Summary: [4.3 regression] ICE redeclaring namespace as struct 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=33207