Intermittent CRASH with "mozilla::detail::MutexImpl::~MutexImpl: pthread_mutex_destroy failed: Device or resource busy" #21696
Description
▶ CRASH [expected PASS] /css/CSS2/normal-flow/max-height-060.xht
│
│ VMware, Inc.
│ softpipe
│ 3.3 (Core Profile) Mesa 18.1.0-devel
│ Shutting down the Constellation after generating an output file or exit flag specified
│ mozilla::detail::MutexImpl::~MutexImpl: pthread_mutex_destroy failed: Device or resource busy
│ thread panicked while processing panic. aborting.
│ thread panicked while processing panic. aborting.
│ thread panicked while processing panic. aborting.
│ thread panicked while processing panic. aborting.
│ thread panicked while processing panic. aborting.
│ thread panicked while processing panic. aborting.
There are about 1000 more entries for the panic too.