Thread 4 (Thread -1257055344 (LWP 8301)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb74204c7 in poll () from /lib/i686/libc.so.6
#2  0xb7d7f0fb in PR_Poll () from /usr/lib/libnspr4.so
#3  0xb7d85ae0 in __cxa_pure_virtual () from /usr/lib/libnspr4.so
#4  0xb7d83488 in __cxa_pure_virtual () from /usr/lib/libnspr4.so
#5  0xb7d4a462 in start_thread () from /lib/i686/libpthread.so.0
#6  0xb742a82e in clone () from /lib/i686/libc.so.6

Thread 1 (Thread -1224124720 (LWP 8295)):
#0  0xb73c0870 in __cxa_pure_virtual () from /lib/i686/libc.so.6
#1  0xb6de2dbc in __cxa_pure_virtual () from /usr/lib/firefox-2.0.0.9/components/libautoconfig.so
#2  0xb74dc204 in __cxa_pure_virtual () from /usr/lib/libstdc++.so.6
#3  0xbfd40002 in ?? ()
#4  0xb7f58289 in _dl_name_match_p (name=0x909ff70 "n", map=<value optimized out>) at dl-misc.c:319
#5  0xb73c293d in __cxa_pure_virtual () from /lib/i686/libc.so.6
#6  0xb73c1e41 in __cxa_pure_virtual () from /lib/i686/libc.so.6
#7  0xbfd41038 in ?? ()
#8  0xb7f53460 in do_lookup_x (new_hash=3074947160, old_hash=0xbfd4109c, ref=0xb7498120, result=0x800, scope=0xb7f45658,
    i=2048, flags=135347088, skip=0xb7ecb1fb) at do-lookup.h:196
#9  0xb73c47b7 in malloc () from /lib/i686/libc.so.6
#10 0xb7ecb1fb in DefaultAllocTable (pool=0x0, size=2048) at jshash.c:70
#11 0xb7ecacbc in Resize (ht=0x819c860, newshift=3075047712) at jshash.c:215
#12 0xb7f134d5 in js_PurgeDeflatedStringCache (rt=0x8113b90, str=0x821f758) at jsstr.c:2606
#13 0xb7f13558 in js_FinalizeStringRT (rt=0x8113b90, str=0x821f758) at jsstr.c:2635
#14 0xb7ea4357 in js_atom_uninterner (he=0x82545c8, i=4843, arg=0x21) at jsatom.c:399
#15 0xb7ecaded in JS_HashTableEnumerateEntries (ht=0x8180e30, f=0xb7ea4320 <js_atom_uninterner>, arg=0xbfd4114c)
    at jshash.c:366
#16 0xb7ea440c in js_FinishAtomState (state=0x8113c74) at jsatom.c:414
#17 0xb7e9e95a in JS_Finish (rt=0x8113b90) at jsapi.c:760
#18 0xb64d08db in ~nsJSRuntimeServiceImpl (this=0x80ebbb8) at xpcruntimesvc.cpp:93
#19 0xb64d03a8 in nsJSRuntimeServiceImpl::Release (this=0x80ebbb8) at xpcruntimesvc.cpp:101
#20 0xb64cd113 in ~XPCJSRuntime (this=0x80eab80) at xpcjsruntime.cpp:723
#21 0xb64b43ce in ~nsXPConnect (this=0x80e8598) at nsXPConnect.cpp:154
#22 0xb64b36bb in nsXPConnect::Release (this=0x80e8598) at nsXPConnect.cpp:48
#23 0xb632298b in nsScriptSecurityManager::Shutdown () at nsScriptSecurityManager.cpp:3116
#24 0xb7dd7145 in nsGenericModule::Shutdown (this=0x8185a60) at nsGenericFactory.cpp:339
#25 0xb7dd7498 in nsGenericModule::Release (this=0x8185a60) at nsGenericFactory.cpp:244
#26 0xb7e23657 in nsDll::Shutdown (this=0x81855a0) at xcDll.cpp:271
#27 0xb7e210cf in nsFreeLibrary (dll=0x81855a0, serviceMgr=<value optimized out>, when=3) at nsNativeComponentLoader.cpp:287
#28 0xb7e21110 in nsFreeLibraryEnum (aKey=0x81855d0, aData=0x81855a0, closure=0xbfd413d0) at nsNativeComponentLoader.cpp:360
#29 0xb7ddfb71 in hashEnumerate (table=0x80a486c, hdr=0x80a51d4, i=30, arg=0xbfd41398) at nsHashtable.cpp:131
#30 0xb7dd36eb in PL_DHashTableEnumerate (table=0x80a486c, etor=0xb7ddfb50 <hashEnumerate>, arg=0xbfd41398) at pldhash.c:683
#31 0xb7ddfdec in nsHashtable::Enumerate (this=0x80a4864, aEnumFunc=0xb7e210f0 <nsFreeLibraryEnum>, aClosure=0xbfd413d0)
    at nsHashtable.cpp:319
#32 0xb7e20fe0 in nsNativeComponentLoader::UnloadAll (this=0x80a4858, aWhen=3) at nsNativeComponentLoader.cpp:977
#33 0xb7e1d7e7 in nsComponentManagerImpl::UnloadLibraries (this=0x809e4b8, serviceMgr=0x0, aWhen=3)
    at nsComponentManager.cpp:3121
#34 0xb7e1d93b in nsComponentManagerImpl::Shutdown (this=0x809e4b8) at nsComponentManager.cpp:897
#35 0xb7dd9980 in NS_ShutdownXPCOM_P (servMgr=0x809e4bc) at nsXPComInit.cpp:869
#36 0x0804b63d in ~ScopedXPCOMStartup (this=0xbfd417b8) at nsAppRunner.cpp:771
#37 0x0804f38c in XRE_main (argc=1660973576, argv=0xb5a359a0, aAppData=0x834b2e0) at nsAppRunner.cpp:2833
#38 0x0804abcf in main (argc=Cannot access memory at address 0x21
) at nsBrowserApp.cpp:61
#39 0xb7370f90 in __libc_start_main () from /lib/i686/libc.so.6
#40 0x0804ab21 in _start ()