[Bug middle-end/59250] New: usan: ICE (segfault) with -fsanitize=undefined in ubsan_create_data

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59250

            Bug ID: 59250
           Summary: usan: ICE (segfault) with -fsanitize=undefined in
                    ubsan_create_data
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
                CC: mpolacek at gcc dot gnu.org

Created attachment 31272
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31272&action=edit
Test case: Run as "g++ -fsanitize=undefined test29.ii"

The followed code worked about week ago but fails now (r205246) with a segfault
on x86-64-gnu-linux.

$ g++ -fsanitize=undefined test29.ii
test29.ii: In constructor 'FileHandle::FileHandle(const char*)':
test29.ii:27:1: internal compiler error: Segmentation fault
 FileHandle::FileHandle (const char* fname) : fname(fname) {
 ^
0xb9f85f crash_signal
        ../../gcc/toplev.c:336
0xbbab24 ubsan_source_location
        ../../gcc/ubsan.c:230
0xbbab24 ubsan_create_data(char const*, unsigned int, ubsan_mismatch_data
const*, ...)
        ../../gcc/ubsan.c:463
0xbbb179 ubsan_expand_null_ifn(gimple_stmt_iterator_d)
        ../../gcc/ubsan.c:565