Samba 4.3 and 4.4 crashes on FreeBSD 11-ALPHA4

Hi,

Decided to try ALPHA4 and Samba 4.3 and 4.4 doesn't seem very happy.

Fatal error 'mutex 0x8013ec000 own 0x18cdc is on list 0x8112161a0 0x0' at line 153 in file /usr/src/lib/libthr/thread/thr_mutex.c (errno = 4)
[2016/06/19 01:14:47.689256,  0] ../lib/util/fault.c:78(fault_report)
  ===============================================================
[2016/06/19 01:14:47.689450,  0] ../lib/util/fault.c:79(fault_report)
  INTERNAL ERROR: Signal 6 in pid 45222 (4.4.3)
  Please read the Trouble-Shooting section of the Samba HOWTO
[2016/06/19 01:14:47.689479,  0] ../lib/util/fault.c:81(fault_report)
  ===============================================================
[2016/06/19 01:14:47.689498,  0] ../source3/lib/util.c:791(smb_panic_s3)
  PANIC (pid 45222): internal error
[2016/06/19 01:14:47.690577,  0] ../source3/lib/util.c:902(log_stack_trace)
  BACKTRACE: 6 stack frames:
   #0 0x803c16fe8 <log_stack_trace+0x28> at /usr/local/lib/samba4/libsmbconf.so.0
   #1 0x803c16ed2 <smb_panic_s3+0x52> at /usr/local/lib/samba4/libsmbconf.so.0
   #2 0x801696dad <smb_panic+0x13d> at /usr/local/lib/samba4/libsamba-util.so.0
   #3 0x801696c57 <fault_setup+0x157> at /usr/local/lib/samba4/libsamba-util.so.0
   #4 0x8014616df <pthread_sigmask+0x4ff> at /lib/libthr.so.3
   #5 0x801460cbf <pthread_getspecific+0xe9f> at /lib/libthr.so.3
[2016/06/19 01:14:47.690686,  0] ../source3/lib/dumpcore.c:313(dump_core)
  unable to change to %N.core
  refusing to dump core

Fatal error 'mutex 0x8013eb000 own 0x18d3d is on list 0x812e161a0 0x0' at line 153 in file /usr/src/lib/libthr/thread/thr_mutex.c (errno = 4)
[2016/06/19 01:26:41.063681,  0] ../lib/util/fault.c:78(fault_report)
  ===============================================================
[2016/06/19 01:26:41.063827,  0] ../lib/util/fault.c:79(fault_report)
  INTERNAL ERROR: Signal 6 in pid 61297 (4.3.9)
  Please read the Trouble-Shooting section of the Samba HOWTO
[2016/06/19 01:26:41.063844,  0] ../lib/util/fault.c:81(fault_report)
  ===============================================================
[2016/06/19 01:26:41.063855,  0] ../source3/lib/util.c:789(smb_panic_s3)
  PANIC (pid 61297): internal error
[2016/06/19 01:26:41.064679,  0] ../source3/lib/util.c:900(log_stack_trace)
  BACKTRACE: 6 stack frames:
   #0 0x803846eb8 <log_stack_trace+0x28> at /usr/local/lib/libsmbconf.so.0
   #1 0x803846da2 <smb_panic_s3+0x52> at /usr/local/lib/libsmbconf.so.0
   #2 0x80168c12d <smb_panic+0x13d> at /usr/local/lib/libsamba-util.so.0
   #3 0x80168bfd7 <fault_setup+0x157> at /usr/local/lib/libsamba-util.so.0
   #4 0x8014606df <pthread_sigmask+0x4ff> at /lib/libthr.so.3
   #5 0x80145fcbf <pthread_getspecific+0xe9f> at /lib/libthr.so.3
[2016/06/19 01:26:41.064747,  0] ../source3/lib/dumpcore.c:313(dump_core)
  unable to change to %N.core
  refusing to dump core

This occurs immediately when you start Samba so it's easy to replicate.
I know that 4.3 worked on r298887 for sure, I'm going to try this in VM too but I'd apperciate if anyone else could give this a go.

I noticed that there were some changes in libthr which might be a clue....

Best regards,
Daniel Engberg