[Bug c/66230] Using optimizations causes program to segfault

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66230

--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65709 for a similar bug
in LZ4.