wip/firefox unstable on NetBSD/amd64 4.99.55

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

(I am posting to NetBSD list instead of pkgsrc-wip list just in case 
someone recognizes this issue.)

wip/firefox frequently crashes on me on NetBSD/amd64 4.99.55.

From core dump:

#0  0x00007f7ff7232f7a in _lwp_park () from /usr/lib/libc.so.12
#1  0x00007f7ffdc0bb03 in pthread__park () from /usr/lib/libpthread.so.0
#2  0x00007f7ffdc0950d in pthread_cond_timedwait ()
   from /usr/lib/libpthread.so.0
#3  0x00007f7ffb724441 in PRP_NakedNotify ()
   from /usr/pkg/lib/firefox/libnspr4.so
#4  0x00007f7ffb724fa9 in PR_WaitCondVar ()
   from /usr/pkg/lib/firefox/libnspr4.so
#5  0x00007f7ffb7250a6 in PR_Wait () from /usr/pkg/lib/firefox/libnspr4.so
#6  0x00007f7ffd5a09f4 in nsThreadPool::Run ()
   from /usr/pkg/lib/firefox/libxul.so
#7  0x00007f7ffd59e8d7 in nsThread::ProcessNextEvent ()
   from /usr/pkg/lib/firefox/libxul.so
#8  0x00007f7ffd566019 in NS_ProcessNextEvent_P ()
   from /usr/pkg/lib/firefox/libxul.so
#9  0x00007f7ffd59ec7d in nsThread::ThreadFunc ()
   from /usr/pkg/lib/firefox/libxul.so
#10 0x00007f7ffb729ebc in PR_JoinThread ()
   from /usr/pkg/lib/firefox/libnspr4.so
#11 0x00007f7ffdc0b39b in pthread_create () from /usr/lib/libpthread.so.0
#12 0x00007f7ff7252f30 in swapcontext () from /usr/lib/libc.so.12
#13 0x00007f7ffdf11000 in ?? ()
#14 0x0000000000000000 in ?? ()



I don't like reporting issues to Mozilla as we have several patches and 
would like to test without them first.

  Jeremy C. Reed