[Bug bootstrap/71481] [7 regression] ICE during selftest: input.c: test_reading_source_line

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71481

--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #5)
> this seems to fix it:

Thanks, and sorry for the breakage.

I wonder if it would be better to instead hardcode LANG=C in the Makefile.am
hooks that run the selftests?  The DejaGnu-based testsuite does that.