[Bug] z_session_drop might not immediately close the session #1120
Description
Describe the bug
z_session_drop might not immediately close the session.
The issue comes from the fact that session is a strong rc, and internally we occasionally upgrade weak session pointers to strong temporary to perform various operations, if this happens concurrently with z_session_drop, the session will not be closed upon return due to lingering strong session pointers.
To reproduce
call concurrently z_session_drop with any other operation temporary upgrading session (like z_publisher_put for example).
System info
Any multi-threaded