[Bug sanitizer/77567] ASAN: Bugus error "alloc-dealloc-mismatch (malloc vs operator delete [])" with C++17's over-aligned types

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77567

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 39612
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39612&action=edit
pr77567-2.patch

Slightly larger patch, which attempts to diagnose that, but fails to do so,
because asan_allocator.cc only has:
  u32 alloc_type        : 2;
and we now need 3 bits instead of just 2.
Dmitry, is there any possibility to free one bit for this in ChunkHeader?