Bug#329927: more information on this error:

[Brandon Coleman]

Please e-mail me if you need further information on this bug at the account metrix1978 and
the host: @gmail.com.
The Samba 'panic action' script, /usr/share/samba/panic-action,
was called for PID 3536 (/usr/sbin/smbd).

This means there was a problem with the program, such as a segfault.
Below is a backtrace for this process generated with gdb, which shows
the state of the program at the time the error occurred.  The Samba log
files may contain additional information about the problem.

If the problem persists, you are encouraged to first install the
samba-dbg package, which contains the debugging symbols for the Samba
binaries.  Then submit the provided information as a bug report to
Debian.  For information about the procedure for submitting bug reports,
please see http://www.debian.org/Bugs/Reporting or the reportbug(1)
manual page.

Using host libthread_db library "/lib/tls/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 1078160128 (LWP 3536)]
0x403137be in waitpid () from /lib/tls/libc.so.6
#0  0x403137be in waitpid () from /lib/tls/libc.so.6
#1  0x402bb699 in strtold_l () from /lib/tls/libc.so.6
#2  0x401f653d in system () from /lib/tls/libpthread.so.0
#3  0x0822b8ba in smb_panic (
    why=0xbfffe544 "pdb_get_methods_reload: failed to get pdb methods for backend tdbsam,\n") at lib/util.c:1601
#4  0x081ea941 in pdb_get_methods_reload (reload=<value optimized out>)
    at passdb/pdb_interface.c:218
#5  0x081ea98e in initialize_password_db (reload=0)
    at passdb/pdb_interface.c:1116
#6  0x082c1cd1 in main (argc=1076606295, argv=0x401f9ff4) at smbd/server.c:922