ASSERT signal.c:6329 !info->shared_itimer || self_owns_recursive_lock(info->shared_itimer_lock)

This happened on a 3rd-party app using static DR and static drmemtrace:

<Attached to 9 threads in application xxx (6257)>
<Application xxx (6257).  Internal Error: DynamoRIO debug check failure: core/unix/signal.c:6329 !info->shared_itimer || self_owns_recursive_lock(info->shared_itimer_lock)
(Error occurred @47 frags)