A "#pragma pop_macro" without a preceding "#pragma push_macro" triggers an ICE on mingw32
// pop_macro.c #define X 1 int main() { // # pragma push_macro("X") # undef X # define X 2 # pragma pop_macro("X") return 0; } gcc pop_macro.c pop_macro.c: In function 'main': pop_macro.c:9: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. -- Summary: #pragma pop_macro causes ICE if no macro value on stack Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: preprocessor AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dannysmith at users dot sourceforge dot net GCC target triplet: i686-pc-mingw32 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35061