https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107711
--- Comment #5 from urs at akk dot org --- On Wed, Nov 16, 2022 at 03:54:54PM +0000, dmalcolm at gcc dot gnu.org wrote: > If you're familiar with gdb, would you be able to reproduce the crasher under > gdb, by adding: > -wrapper gdb,--args > to the crashing gcc invocation, and getting a backtrace at the point of the > crash. Program received signal SIGSEGV, Segmentation fault. 0x0000000000cf0871 in LINEMAPS_USED(line_maps const*, bool) () (gdb) bt #0 0x0000000000cf0871 in LINEMAPS_USED(line_maps const*, bool) () #1 0x0000000002e50aa3 in LINEMAPS_MACRO_USED(line_maps const*) () #2 0x0000000002e50adc in LINEMAPS_MACRO_LOWEST_LOCATION(line_maps const*) () #3 0x0000000002e7cd2e in linemap_location_from_macro_expansion_p(line_maps const*, unsigned int) () #4 0x0000000002e7c49d in linemap_lookup(line_maps const*, unsigned int) () #5 0x0000000002e7f752 in _cpp_warn_if_unused_macro () #6 0x0000000002e8a46d in ht_forall(ht*, int (*)(cpp_reader*, ht_identifier*, void const*), void const*) () #7 0x0000000002e6d9e6 in cpp_forall_identifiers(cpp_reader*, int (*)(cpp_reader*, cpp_hashnode*, void*), void*) () #8 0x0000000002e6f1b2 in cpp_finish(cpp_reader*, _IO_FILE*) () #9 0x0000000000d26427 in c_common_finish() () #10 0x000000000151a5f5 in finalize(bool) () #11 0x000000000151a966 in do_compile(bool) () #12 0x000000000151ad0e in toplev::main(int, char**) () #13 0x0000000002dded3e in main () > Otherwise, would you be able to try rebuilding gcc with attachment 53911, and > then use -fdump-analyzer, which with that patch ought to dump which name it's > failing on (the dump is written to SOURCEFILE.analyzer.txt). See attachment
