[Bug tree-optimization/125404] [17 regression] gcc/cobol/symfind.cc:526:45: error: array subscript -1 is outside array bounds of 'long unsigned int [1152921504606846975]' [-Werror=array-bounds=] [r17-603-gacfdad706d8acc]

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125404

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andreas Schwab from comment #2)
> Workaround for the rust failure:

Thanks. I tried to get rid of the warning by adding assetions or using
__builtin_unreachable() in basic_string::_M_mutate, without success.

The workaround is ugly and shouldn't be needed, but it's easier to do that than
fix the warnings.