The following invalid code snippet is accepted since GCC 3.4.0: ========================================= template<int> struct A {};
template<typename> struct B : A<sizeof(0=0)> {}; ========================================= Before the code was correctly rejected, although the error message couldn't be printed: bug.cc:3: sorry, unimplemented: `modop_expr' not supported by dump_expr bug.cc:3: sorry, unimplemented: `modop_expr' not supported by dump_expr -- Summary: [4.1/4.2/4.3/4.4 regression] Invalid argument to sizeof not rejected in template Product: gcc Version: 4.4.0 Status: UNCONFIRMED Keywords: accepts-invalid, 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=35324