The following invalid code snippet triggers an ICE on mainline and 4.2 branch:
==================================== struct A {}; template<A, typename T> int operator-(A, T); int i = A() - 0; ==================================== bug.cc:3: error: 'struct A' is not a valid type for a template constant parameter bug.cc:5: internal compiler error: in template_decl_level, at cp/pt.c:10412 Please submit a full bug report, [etc.] -- Summary: [4.2/4.3 regression] ICE with invalid template operator 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=30535