9e337cca2b
If a subsidiary thread calls exit(), its context is used (on Solaris at least) for calling the atexit routines. If one of those routines cancels the thread that called exit(), the exit itself gets cancelled and any remaining threads are left running, possibly including the main() thread. Thus the check in myAtExit() should have been to not cancel the current thread; when this was tested, presumably only calls to exit() from the main() thread were checked.
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