lib/47201: "_res is not supported for multi-threaded programs." with firefox-16.0.2

[ryoon%NetBSD.org@localhost]

>Number:         47201
>Category:       lib
>Synopsis:       "_res is not supported for multi-threaded programs." with 
>firefox-16.0.2
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Nov 16 19:10:01 +0000 2012
>Originator:     Ryo ONODERA
>Release:        NetBSD 6.99.15
>Organization:
        
>Environment:
        
        
System: NetBSD tellurium.elements.tetera.org 6.99.15 NetBSD 6.99.15 (NODKWEDGE) 
#90: Sat Nov 17 01:34:47 JST 2012 
root%tellurium.elements.tetera.org@localhost:/usr/obj/sys/arch/amd64/compile/NODKWEDGE
 amd64
Architecture: x86_64
Machine: amd64
>Description:
Sometimes firefox-16.0.2 crashes with "_res is not supported for multi-threaded 
programs." error message, suddenly.

% gdb /usr/pkg/lib/xulrunner/xulrunner xulrunner.core
GNU gdb (GDB) 7.3.1
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64--netbsd".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/pkg/lib/xulrunner/xulrunner...(no debugging symbols 
found)...done.
[New process 55]
[New process 62]
[New process 61]
[New process 60]
[New process 57]
[New process 56]
[New process 53]
[New process 49]
[New process 45]
[New process 44]
[New process 27]
[New process 26]
[New process 21]
[New process 19]
[New process 18]
[New process 17]
[New process 16]
[New process 13]
[New process 12]
[New process 11]
[New process 10]
[New process 8]
[New process 7]
[New process 6]
[New process 5]
[New process 4]
[New process 3]
[New process 2]
[New process 1]
Core was generated by `xulrunner'.
Program terminated with signal 6, Aborted.
#0  0x00007f7ff6906f9a in _lwp_kill () from /usr/lib/libc.so.12
(gdb) where
#0  0x00007f7ff6906f9a in _lwp_kill () from /usr/lib/libc.so.12
#1  0x00007f7ff3b48249 in ?? () from /usr/pkg/lib/xulrunner/libxul.so
#2  0x00007f7ff689b0b0 in opendir () from /usr/lib/libc.so.12
#3  0xfffffffb00000006 in ?? ()
#4  0x0000000000000000 in ?? ()
(gdb)

% ls -lF /usr/lib/libc.*
-r--r--r--  1 root  wheel  3797846 Nov 17 01:37 /usr/lib/libc.a
lrwxr-xr-x  1 root  wheel       24 Nov 17 01:37 /usr/lib/libc.so@ -> 
../../lib/libc.so.12.185
lrwxr-xr-x  1 root  wheel       24 Nov 17 01:37 /usr/lib/libc.so.12@ -> 
../../lib/libc.so.12.185
lrwxr-xr-x  1 root  wheel       24 Nov 17 01:37 /usr/lib/libc.so.12.185@ -> 
../../lib/libc.so.12.185
r

        
>How-To-Repeat:
firefox&
        
>Fix:
        
I have no idea.


>Unformatted: