I found a thread about this in the bind9-user archives from 2003. Does
anyone know/remember which particular Sun patch is required? This machine
has a good few patches installed, but is probably not up to date. Note:
the OP experienced this problem on Solaris 7.

# uname -a
SunOS srv1 5.9 Generic_112233-12 sun4u sparc SUNW,UltraAX-i2

# grep critical named.log
09-Jul-2008 05:24:32.640 general: critical: time.c:136: INSIST(t->nanoseconds <
1000000000) failed
09-Jul-2008 05:24:32.640 general: critical: exiting (due to assertion failure)

# gdb named core
GNU gdb 5.2
Copyright 2002 Free Software Foundation, Inc.
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welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "sparc-sun-solaris2.8"...
Core was generated by `/usr/sbin/named'.
Program terminated with signal 6, Aborted.
Reading symbols from /usr/lib/libdl.so.1...done.
Loaded symbols for /usr/lib/libdl.so.1
Reading symbols from /usr/lib/libnsl.so.1...done.
Loaded symbols for /usr/lib/libnsl.so.1
Reading symbols from /usr/lib/libsocket.so.1...done.
Loaded symbols for /usr/lib/libsocket.so.1
Reading symbols from /usr/lib/libpthread.so.1...done.
Loaded symbols for /usr/lib/libpthread.so.1
Reading symbols from /usr/lib/libthread.so.1...done.
Loaded symbols for /usr/lib/libthread.so.1
Reading symbols from /usr/lib/libc.so.1...done.
Loaded symbols for /usr/lib/libc.so.1
Reading symbols from /usr/lib/libmp.so.2...done.
Loaded symbols for /usr/lib/libmp.so.2
Reading symbols from /usr/platform/SUNW,UltraAX-i2/lib/libc_psr.so.1...done.
Loaded symbols for /usr/platform/SUNW,UltraAX-i2/lib/libc_psr.so.1
#0 0xff220218 in _lwp_sigtimedwait () from /usr/lib/libc.so.1
(gdb) bt
#0 0xff220218 in _lwp_sigtimedwait () from /usr/lib/libc.so.1
#1 0xff1d0c88 in initstate () from /usr/lib/libc.so.1
#2 0xff1b6ea0 in addsev () from /usr/lib/libc.so.1
internal error - unimplemented function unk_lang_create_fundamental_type called.