[Bug c++/63412] aliasing issue exposed by inlining

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63412

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
https://gcc.gnu.org/bugs/

"Similarly, if compiling with -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations makes a difference, your code probably is
not correct."

Turning off strict aliasing stops it crashing => you broke the aliasing rules