[Bug tree-optimization/102466] -O3 -fsanitize=undefined causes warnings (writing 2 bytes into a region of size 0)

[mathieu.malaterre at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102466

--- Comment #4 from Mathieu Malaterre <mathieu.malaterre at gmail dot com> ---
I can reproduce it using -Wall -fsanitize=undefined  -O2

* https://github.com/malaterre/PublicRep/tree/master/gcc/libjxl