Weird SIGSEGV from bson library on pg15

[hari90]

Describe the bug

After a lot of investigation we found pg_aligned_alloc does not use aligned allocations on pg version below 16 causing all sorts of weird errors when bson lib is allocating memory. The bson lib expects aligned memory allocations but the extension overrides the internal allocator with pg specific ones.

Environment

• Operating system and version: All
• PostgreSQL version: 15
• Architecture: All

[lichoil]

@hari90 can you give more context of this issue and how we can repro this issue?

[shuaitian-git]

Closing this issue for now. Please feel free to reopen it if the problem recurs.

[hari90]

We were able to work around this by building BSON with -DENABLE_EXTRA_ALIGNMENT=OFF