Sean Kelly <> changed:

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--- Comment #1 from Sean Kelly <> 2011-01-31 11:16:39 PST 
This one is weird, and doesn't appear related to 4307.  One of the threads
(thread A) is in a GC collection and blocked trying to acquire the mutex
protecting the global thread list within thread_resumeAll. Another thread
(thread B) is also blocked trying to acquire this mutex for other reasons.  My
best guess is that pthread_mutex in OSX is trying to give ownership of the lock
to thread B, and since thread B is suspended it effectively blocks thread A
from acquiring it to resume execution after the GC cycle.

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