[Bug go/108426] [13 regression] SEGV in contains_struct_check

[ian at airs dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108426

--- Comment #4 from Ian Lance Taylor <ian at airs dot com> ---
Thanks Andrew, I'm testing the patch myself, but go ahead and commit if you are
satisfied with it.