The following invalid code snippet triggers a segfault since GCC 3.1: ======================== namespace std { union abort; }
void abort(); using std::abort; ======================== bug.cc:8: internal compiler error: Segmentation fault Please submit a full bug report, [etc.] Compiling the code with "-fno-builtin" yields: bug.cc:8: error: 'abort' is already declared in this scope A slightly different testcase triggers the following ICE: ======================== namespace std { union abort; } union abort; using std::abort; ======================== bug.cc:8: internal compiler error: tree check: expected class 'type', have 'declaration' (type_decl) in comptypes, at cp/typeck.c:1115 Please submit a full bug report, [etc.] -- Summary: [4.1/4.2/4.3 regression] ICE with invalid redeclaration of builtin Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code, 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=31749