[Bug c/51628] __attribute__((packed)) is unsafe in some cases (i.e. add -Waddress-of-packed-member, etc.)

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51628

--- Comment #57 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Christophe Lyon from comment #56)
> The updated testcase pr51628-10 fails at execution on aarch64
> FAIL: c-c++-common/pr51628-10.c  -Wc++-compat  execution test

Do you know why it fails?