pjlib-test failed with "Bus Error" on MacOS X

[bennylp]

QA report:

only run pjlib-test, found problem:

first run:
---
 23:32:28.571 Running udp_ioqueue_unreg_test()...
 23:32:28.571 ..testing with concurency=1
 23:32:28.571 ...ioqueue unregister stress test 0/3 (select)
 23:32:29.587 ....repeat 0/10: done (210 KB/s)
 23:32:30.613 ....repeat 1/10: done (207 KB/s)
 23:32:31.640 ....repeat 2/10: done (207 KB/s)
 23:32:32.657 ....repeat 3/10: done (209 KB/s)
 23:32:33.682 ....repeat 4/10: done (206 KB/s)
 23:32:34.709 ....repeat 5/10: done (206 KB/s)
 23:32:35.720 ....repeat 6/10: done (213 KB/s)
 23:32:36.731 ....repeat 7/10: done (209 KB/s)
Bus error
---

second try, it seemed to stuck (more than 12 minutes) at:
---
 23:36:14.558 Running udp_ioqueue_unreg_test()...
....
 23:36:55.235 ..testing with concurency=0
 23:36:55.235 ...ioqueue unregister stress test 0/3 (select)
 23:36:56.262 ....repeat 0/10: done (207 KB/s)
 23:36:57.272 ....repeat 1/10: done (207 KB/s)
----

third try, error (same as first try)
 23:52:39.335 Running udp_ioqueue_unreg_test()...
 23:52:39.335 ..testing with concurency=1
 23:52:39.335 ...ioqueue unregister stress test 0/3 (select)
 23:52:40.363 ....repeat 0/10: done (207 KB/s)
 23:52:41.373 ....repeat 1/10: done (209 KB/s)
 23:52:42.390 ....repeat 2/10: done (208 KB/s)
 23:52:43.406 ....repeat 3/10: done (207 KB/s)
 23:52:44.423 ....repeat 4/10: done (206 KB/s)
 23:52:45.432 ....repeat 5/10: done (209 KB/s)
 23:52:46.440 ....repeat 6/10: done (209 KB/s)
 23:52:47.450 ....repeat 7/10: done (208 KB/s)
Bus error