FreeBSD-12p8 jail
Samab410-4.10.15

Possibly related to bug:245707

Attempt to change user password while user is logged in to domain gives a core dump:

[root at smb4-2 ~ (master)]# samba-tool user password -U testuser
Password for [BROCKLEY\testuser]:
New Password:
Retype Password:
Bad talloc magic value - unknown value
===============================================================
INTERNAL ERROR: Signal 6 in pid 79543 (4.10.15)
If you are running a recent Samba version, and if you think this problem is not
yet fixed in the latest versions, please consider reporting this bug, see
https://wiki.samba.org/index.php/Bug_Reporting
===============================================================
smb_panic_default: PANIC (pid 79543): internal error
BACKTRACE: 6 stack frames:
 #0 0x8015c73c7 <log_stack_trace+0x37> at /usr/local/lib/samba4/libsamba-util.so.0
 #1 0x8015c723e <smb_panic+0x9e> at /usr/local/lib/samba4/libsamba-util.so.0
 #2 0x8015c71b5 <smb_panic+0x15> at /usr/local/lib/samba4/libsamba-util.so.0
 #3 0x8015c759e <log_stack_trace+0x20e> at
/usr/local/lib/samba4/libsamba-util.so.0
 #4 0x8015c7199 <fault_setup+0x59> at /usr/local/lib/samba4/libsamba-util.so.0
 #5 0x8005f13c0 <_pthread_sigmask+0x530> at /lib/libthr.so.3
Abort trap (core dumped)