RUSTSEC-2020-0017: internment: Use after free in ArcIntern::drop

Description

ArcIntern::drop has a race condition where it can release memory which is about to get another user. The new user will get a reference to freed memory.

Versions prior to 0.3.12 used stronger locking which avoided the problem.

More Info

https://github.com/droundy/internment/issues/11

Patched Versions

Unaffected Versions