(gdb) thread apply all bt Thread 4 (Thread 0xf6938b90 (LWP 30722)): #0  0xf7f40430 in __kernel_vsyscall () #1  0xf73ed4fb in write () from /lib32/libpthread.so.0 #2  0xf7a17ca3 in -[GSRunLoopThreadInfo addPerformer:] (self=0x8cf81c0, _cmd=0xf7b2cc90,    performer=0xf60085e8) at NSThread.m:922 #3  0xf7a18bb0 in -[NSObject(NSThreadPerformAdditions) performSelector:onThread:withObject:waitUntilDone:modes:] (self=0x9461ff0, _cmd=0xf7b2cc60, aSelector=0x81cdba8, aThread=0x8b762e8, anObject=0x0,    aFlag=0 '\000', anArray=0x8d09330) at NSThread.m:1254 #4  0xf7a16813 in -[NSObject(NSThreadPerformAdditions) performSelectorOnMainThread:withObject:waitUntilDone:modes:] (self=0x9461ff0, _cmd=0xf7b2cc68, aSelector=0x81cdba8, anObject=0x0,    aFlag=, anArray=0x8d09330) at NSThread.m:1176 #5  0xf7a18642 in -[NSObject(NSThreadPerformAdditions) performSelectorOnMainThread:withObject:waitUntilDone:] (self=0x9461ff0, _cmd=0x81cdbb0, aSelector=0x81cdba8, anObject=0x0, aFlag=)    at NSThread.m:1187 #6  0x080d5056 in -[VNCView primaryThreadNeedsDisplayInRect:] (self=0x9461ff0, _cmd=0x81f2ad8, aRect=        {origin = {x = 160, y = 320}, size = {width = 32, height = 16}}) at VNCView.m:789 #7  0x0814d6dd in -[VNCConnection(VNCEncodings) readFrameBufferUpdate] (self=0x95e2130, _cmd=0x81ca670)    at VNCConnectionEncodings.m:1132 #8  0x080c3cbf in -[VNCConnection processIncomingMessage] (self=0x95e2130, _cmd=0x81ca658)    at VNCConnection.m:3263 #9  0x080ce421 in -[VNCConnection checkForIncomingMessage] (self=0x95e2130, _cmd=0x81ca310)    at VNCConnection.m:3233 #10 0x080c42ad in -[VNCConnection runVNCLoop] (self=0x95e2130, _cmd=0x81ca1c0) at VNCConnection.m:1364 #11 0x080c6234 in -[VNCConnection startVNCThreadWithDictionary:] (self=0x95e2130, _cmd=0x81ca158,    connectionDictionary=0x8f85db8) at VNCConnection.m:1031 #12 0xf79a84d0 in -[NSObject performSelector:withObject:] (self=0x95e2130, _cmd=0xf7b2cbd8,    aSelector=0x81ca158, anObject=0x8f85db8) at NSObject.m:1855 ---Type to continue, or q to quit--- #13 0xf7a16ff4 in -[NSThread main] (self=0x900f588, _cmd=0xf7b2cbe0) at NSThread.m:760 #14 0xf7a17739 in nsthreadLauncher (thread=0x900f588) at NSThread.m:823 #15 0xf73e64ff in start_thread () from /lib32/libpthread.so.0 #16 0xf7323cee in clone () from /lib32/libc.so.6 Thread 1 (Thread 0xf6ff26d0 (LWP 30717)): #0  0xf7f40430 in __kernel_vsyscall () #1  0xf73ed179 in __lll_lock_wait () from /lib32/libpthread.so.0 #2  0xf73e8244 in _L_lock_89 () from /lib32/libpthread.so.0 #3  0xf73e7b42 in pthread_mutex_lock () from /lib32/libpthread.so.0 #4  0xf79955a8 in -[NSLock lock] (self=0x8cf7338, _cmd=0xf7b2cb88) at NSLock.m:206 #5  0xf7a1802b in -[GSRunLoopThreadInfo fire] (self=0x8cf81c0, _cmd=0xf7b5f088) at NSThread.m:1015 #6  0xf7aa6f31 in -[GSRunLoopCtxt pollUntil:within:] (self=0x8d00528, _cmd=0xf7b20e50, milliseconds=0,    contexts=0x8cf7458) at GSRunLoopCtxt.m:612 #7  0xf79e84a6 in -[NSRunLoop acceptInputForMode:beforeDate:] (self=0x8cf7430, _cmd=0xf7b20e78,    mode=0xf7b20ec0, limit_date=0x9297ce8) at NSRunLoop.m:1197 #8  0xf79e6563 in -[NSRunLoop runMode:beforeDate:] (self=0x8cf7430, _cmd=0xf7f05820, mode=0xf7b20ec0,    date=0x8d03018) at NSRunLoop.m:1265 #9  0xf7dbb440 in -[GSDisplayServer(EventOps) getEventMatchingMask:beforeDate:inMode:dequeue:] (    self=0x8d3d390, _cmd=0xf6e3f198, mask=4294967295, limit=0x8d03018, mode=0xf7b20ec0, flag=1 '\001')    at GSDisplayServer.m:1003 #10 0xf6defa6e in -[XGServer(X11Ops) getEventMatchingMask:beforeDate:inMode:dequeue:] (self=0x8d3d390,    _cmd=0xf7e5ebb0, mask=4294967295, limit=0x8d03018, mode=0xf7b20ec0, flag=)    at XGServerEvent.m:2546 #11 0xf7c2b59f in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (self=0x8d078d8,    _cmd=0xf7e5edf0, mask=4294967295, expiration=0x8d03018, mode=0xf7b20ec0, flag=1 '\001')    at ../Headers/Additions/GNUstepGUI/GSDisplayServer.h:200 #12 0xf7c29581 in -[NSApplication run] (self=0x8d078d8, _cmd=0xf7e54f00) at NSApplication.m:1520 ---Type to continue, or q to quit--- #13 0xf7c09506 in NSApplicationMain (argc=1, argv=0xff9602a4) at Functions.m:89 #14 0x08050e22 in main (argc=Cannot access memory at address 0x80 ) at main.m:13 (gdb)