[Bug middle-end/77486] ubsan detects runtime error: left shift of negative value -3 at real_hash in real.c:2890

[zeccav at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77486

--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
This is on trunk level 239276.
Going to check on newer level 246252.