Experimental Physics and
Industrial Control System

In following up on a strange CI test failure I noticed during the recent codeathon[1]
I realized a mistake I made in adding epicsThreadMustJoin() [2].  This change
introduced a reference counter to struct epicsThreadOSD.  The bug is in
(conditionally) incrementing the ref counter after pthread_create().
This allows a short-lived thread which attempts to self-join to race for a double free().
And it happens that epicsThreadTest does this.

The fix is I think straight forward [3].  I'm wondering how severe this issue should be considered?
It's a race which can cause a crash at runtime.  However, the circumstances seem not so common.