[Bug tree-optimization/106757] [12/13 Regression] Incorrect "writing 1 byte into a region of size 0" on a vectorized loop

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106757

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The unroller has code to put unreachable()s in paths like those but it's
imperfect.