xcode6.3.2 - Xcode crashes on selecting tab in color panel -


i facing strange issue few hours , started suddenly. whenever try select different tab in color panel in xcode,the whole xcode crashes error,

uncaught exception (nsrangeexception): cannot remove observer <nscolorpickerpageablenamelistscrollview 0x7fb8f6ce0910> key path "contentlayoutrect" <highlightcolorpanel 0x7fb8f6c94af0> because not registered observer. 

following full stack trace error,

    process:               xcode [1958]     path:                  /applications/xcode.app/contents/macos/xcode     identifier:            com.apple.dt.xcode     version:               6.3.2 (7718)     build info:            ideframeworks-7718000000000000~2     app item id:           497799835     app external id:       812404257     code type:             x86-64 (native)     parent process:        ??? [1]     responsible:           xcode [1958]     user id:               501      date/time:             2015-06-20 13:50:18.080 +0530     os version:            mac os x 10.10.3 (14d136)     report version:        11     anonymous uuid:        1a8b5ef9-7e79-106c-d0f5-5648ff5fd699   time awake since boot: 6500 seconds  crashed thread:        0  dispatch queue: com.apple.main-thread  exception type:        exc_crash (sigabrt) exception codes:       0x0000000000000000, 0x0000000000000000  application specific information: productbuildversion: 6d2105 uncaught exception (nsrangeexception): cannot remove observer <nscolorpickerpageablenamelistscrollview 0x7fb8f6ce0910> key path "contentlayoutrect" <highlightcolorpanel 0x7fb8f6c94af0> because not registered observer. userinfo: (null) hints: none backtrace:   0  0x00007fff8a22e024 __exceptionpreprocess (in corefoundation)   1  0x0000000104b5abb4 dvtfailurehintexceptionpreprocessor (in dvtfoundation)   2  0x00007fff8839f76e objc_exception_throw (in libobjc.a.dylib)   3  0x00007fff8a22deed +[nsexception raise:format:] (in corefoundation)   4  0x00007fff89de0896 -[nsobject(nskeyvalueobserverregistration) _removeobserver:forproperty:] (in foundation)   5  0x00007fff89de05d9 -[nsobject(nskeyvalueobserverregistration) removeobserver:forkeypath:] (in foundation)   6  0x00007fff89de04a4 -[nsobject(nskeyvalueobserverregistration) removeobserver:forkeypath:context:] (in foundation)   7  0x00007fff8ae8f09b -[nsscrollview _setwindow:] (in appkit)   8  0x00007fff8a14d705 __53-[__nsarraym enumerateobjectswithoptions:usingblock:]_block_invoke (in corefoundation)   9  0x00007fff8a14ce09 -[__nsarraym enumerateobjectswithoptions:usingblock:] (in corefoundation)  10  0x00007fff8b535474 __21-[nsview _setwindow:]_block_invoke735 (in appkit)  11  0x00007fff89e013be -[nsisengine withbehaviors:performmodifications:] (in foundation)  12  0x00007fff8adb1c54 -[nsview _setwindow:] (in appkit)  13  0x00007fff8ade9091 -[nsview removefromsuperview] (in appkit)  14  0x00007fff8b280034 -[nscolorpanel _switchtopicker:] (in appkit)  15  0x00007fff8b0ee1b1 -[nstoolbarbutton sendaction:to:] (in appkit)  16  0x00007fff8afdef5a -[nstoolbaritemviewer mousedown:] (in appkit)  17  0x00007fff8b54f2fc -[nswindow _reallysendevent:isdelayedevent:] (in appkit)  18  0x00007fff8aeded76 -[nswindow sendevent:] (in appkit)  19  0x00007fff8aedb312 -[nsapplication sendevent:] (in appkit)  20  0x0000000105bd8c14 -[ideapplication sendevent:] (in idekit)  21  0x00007fff8ae04c68 -[nsapplication run] (in appkit)  22  0x00007fff8ad81354 nsapplicationmain (in appkit)  23  0x00007fff952435c9 start (in libdyld.dylib)  24  0x0000000000000001  abort() called  application specific signatures: nsrangeexception  application specific backtrace 1: 0   corefoundation                      0x00007fff8a22e03c __exceptionpreprocess + 172 1   dvtfoundation                       0x0000000104b5abb4 dvtfailurehintexceptionpreprocessor + 194 2   libobjc.a.dylib                     0x00007fff8839f76e objc_exception_throw + 43 3   corefoundation                      0x00007fff8a22deed +[nsexception raise:format:] + 205 4   foundation                          0x00007fff89de0896 -[nsobject(nskeyvalueobserverregistration) _removeobserver:forproperty:] + 604 5   foundation                          0x00007fff89de05d9 -[nsobject(nskeyvalueobserverregistration) removeobserver:forkeypath:] + 114 6   foundation                          0x00007fff89de04a4 -[nsobject(nskeyvalueobserverregistration) removeobserver:forkeypath:context:] + 253 7   appkit                              0x00007fff8ae8f09b -[nsscrollview _setwindow:] + 342 8   corefoundation                      0x00007fff8a14d705 __53-[__nsarraym enumerateobjectswithoptions:usingblock:]_block_invoke + 133 9   corefoundation                      0x00007fff8a14ce09 -[__nsarraym enumerateobjectswithoptions:usingblock:] + 313 10  appkit                              0x00007fff8b535474 __21-[nsview _setwindow:]_block_invoke735 + 169 11  foundation                          0x00007fff89e013be -[nsisengine withbehaviors:performmodifications:] + 155 12  appkit                              0x00007fff8adb1c54 -[nsview _setwindow:] + 3191 13  appkit                              0x00007fff8ade9091 -[nsview removefromsuperview] + 453 14  appkit                              0x00007fff8b280034 -[nscolorpanel _switchtopicker:] + 231 15  appkit                              0x00007fff8b0ee1b1 -[nstoolbarbutton sendaction:to:] + 75 16  appkit                              0x00007fff8afdef5a -[nstoolbaritemviewer mousedown:] + 4981 17  appkit                              0x00007fff8b54f2fc -[nswindow _reallysendevent:isdelayedevent:] + 14125 18  appkit                              0x00007fff8aeded76 -[nswindow sendevent:] + 470 19  appkit                              0x00007fff8aedb312 -[nsapplication sendevent:] + 2504 20  idekit                              0x0000000105bd8c14 -[ideapplication sendevent:] + 924 21  appkit                              0x00007fff8ae04c68 -[nsapplication run] + 711 22  appkit                              0x00007fff8ad81354 nsapplicationmain + 1832 23  libdyld.dylib                       0x00007fff952435c9 start + 1 24  ???                                 0x0000000000000001 0x0 + 1  thread 0 crashed:: dispatch queue: com.apple.main-thread 0   libsystem_kernel.dylib          0x00007fff8f7c7286 __pthread_kill + 10 1   libsystem_c.dylib               0x00007fff85fb6b53 abort + 129 2   com.apple.dt.idekit             0x0000000105e09753 +[ideassertionhandler _handleassertionwithlogstring:assertionsignature:assertionreason:extrabacktrace:] + 1507 3   com.apple.dt.idekit             0x0000000105e0a9c8 -[ideassertionhandler handleuncaughtexception:] + 1077 4   com.apple.dt.idekit             0x0000000105e0aa94 idehandleuncaughtexception + 94 5   com.apple.appkit                0x00007fff8ae04d1c -[nsapplication run] + 891 6   com.apple.appkit                0x00007fff8ad81354 nsapplicationmain + 1832 7   libdyld.dylib                   0x00007fff952435c9 start + 1  thread 1:: dispatch queue: com.apple.libdispatch-manager 0   libsystem_kernel.dylib          0x00007fff8f7c8232 kevent64 + 10 1   libdispatch.dylib               0x00007fff92c90a6a _dispatch_mgr_thread + 52  thread 2: 0   libsystem_kernel.dylib          0x00007fff8f7c794a __workq_kernreturn + 10 1   libsystem_pthread.dylib         0x00007fff8d7cb40d start_wqthread + 13  thread 3: 0   libsystem_kernel.dylib          0x00007fff8f7c794a __workq_kernreturn + 10 1   libsystem_pthread.dylib         0x00007fff8d7cb40d start_wqthread + 13  thread 4: 0   libsystem_kernel.dylib          0x00007fff8f7c794a __workq_kernreturn + 10 1   libsystem_pthread.dylib         0x00007fff8d7cb40d start_wqthread + 13  thread 5: 0   libsystem_kernel.dylib          0x00007fff8f7c24de mach_msg_trap + 10 1   libsystem_kernel.dylib          0x00007fff8f7c164f mach_msg + 55 2   com.apple.corefoundation        0x00007fff8a13ceb4 __cfrunloopservicemachport + 212 3   com.apple.corefoundation        0x00007fff8a13c37b __cfrunlooprun + 1371 4   com.apple.corefoundation        0x00007fff8a13bbd8 cfrunlooprunspecific + 296 5   com.apple.foundation            0x00007fff89e28a59 -[nsrunloop(nsrunloop) runmode:beforedate:] + 278 6   com.apple.dtdevicekitbase       0x000000010f108f3c -[dtdkremotedevicedatalistener listenerthreadimplementation] + 974 7   com.apple.foundation            0x00007fff89dd6dc2 __nsthread__main__ + 1345 8   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 9   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 10  libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 6:: com.apple.cfsocket.private 0   libsystem_kernel.dylib          0x00007fff8f7c73fa __select + 10 1   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 2   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 3   libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 7:: com.apple.nsurlconnectionloader 0   libsystem_kernel.dylib          0x00007fff8f7c24de mach_msg_trap + 10 1   libsystem_kernel.dylib          0x00007fff8f7c164f mach_msg + 55 2   com.apple.corefoundation        0x00007fff8a13ceb4 __cfrunloopservicemachport + 212 3   com.apple.corefoundation        0x00007fff8a13c37b __cfrunlooprun + 1371 4   com.apple.corefoundation        0x00007fff8a13bbd8 cfrunlooprunspecific + 296 5   com.apple.cfnetwork             0x00007fff8600f220 +[nsurlconnection(loader) _resourceloadloop:] + 434 6   com.apple.foundation            0x00007fff89dd6dc2 __nsthread__main__ + 1345 7   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 8   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 9   libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 8: 0   libsystem_kernel.dylib          0x00007fff8f7c24de mach_msg_trap + 10 1   libsystem_kernel.dylib          0x00007fff8f7c164f mach_msg + 55 2   com.apple.corefoundation        0x00007fff8a13ceb4 __cfrunloopservicemachport + 212 3   com.apple.corefoundation        0x00007fff8a13c37b __cfrunlooprun + 1371 4   com.apple.corefoundation        0x00007fff8a13bbd8 cfrunlooprunspecific + 296 5   com.apple.appkit                0x00007fff8aed766b _nseventthread + 137 6   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 7   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 8   libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 9:: dymobiledevicemanager 0   libsystem_kernel.dylib          0x00007fff8f7c24de mach_msg_trap + 10 1   libsystem_kernel.dylib          0x00007fff8f7c164f mach_msg + 55 2   com.apple.corefoundation        0x00007fff8a13ceb4 __cfrunloopservicemachport + 212 3   com.apple.corefoundation        0x00007fff8a13c37b __cfrunlooprun + 1371 4   com.apple.corefoundation        0x00007fff8a13bbd8 cfrunlooprunspecific + 296 5   com.apple.foundation            0x00007fff89e28a59 -[nsrunloop(nsrunloop) runmode:beforedate:] + 278 6   com.apple.foundation            0x00007fff89e9e17f -[nsrunloop(nsrunloop) run] + 74 7   com.apple.gputoolsmobilefoundation  0x00000001175d789b -[dymobiledevicemanager _devicenotificationthread:] + 134 8   com.apple.foundation            0x00007fff89dd6dc2 __nsthread__main__ + 1345 9   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 10  libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 11  libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 10: 0   libsystem_kernel.dylib          0x00007fff8f7c794a __workq_kernreturn + 10 1   libsystem_pthread.dylib         0x00007fff8d7cb40d start_wqthread + 13  thread 11: 0   libsystem_kernel.dylib          0x00007fff8f7c794a __workq_kernreturn + 10 1   libsystem_pthread.dylib         0x00007fff8d7cb40d start_wqthread + 13  thread 12: 0   libsystem_kernel.dylib          0x00007fff8f7c7136 __psynch_cvwait + 10 1   com.apple.xcode.devtoolscore    0x000000010eb59866 -[xcblockqueue _processblocksinthreadslotnumber:] + 456 2   com.apple.foundation            0x00007fff89dd6dc2 __nsthread__main__ + 1345 3   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 4   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 5   libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 13: 0   libsystem_kernel.dylib          0x00007fff8f7c7136 __psynch_cvwait + 10 1   com.apple.xcode.devtoolscore    0x000000010eb59866 -[xcblockqueue _processblocksinthreadslotnumber:] + 456 2   com.apple.foundation            0x00007fff89dd6dc2 __nsthread__main__ + 1345 3   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 4   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 5   libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 14: 0   libsystem_kernel.dylib          0x00007fff8f7c7136 __psynch_cvwait + 10 1   com.apple.xcode.devtoolscore    0x000000010eb59866 -[xcblockqueue _processblocksinthreadslotnumber:] + 456 2   com.apple.foundation            0x00007fff89dd6dc2 __nsthread__main__ + 1345 3   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 4   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 5   libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 15: 0   libsystem_kernel.dylib          0x00007fff8f7c24de mach_msg_trap + 10 1   libsystem_kernel.dylib          0x00007fff8f7c164f mach_msg + 55 2   com.apple.corefoundation        0x00007fff8a13ceb4 __cfrunloopservicemachport + 212 3   com.apple.corefoundation        0x00007fff8a13c37b __cfrunlooprun + 1371 4   com.apple.corefoundation        0x00007fff8a13bbd8 cfrunlooprunspecific + 296 5   com.apple.corefoundation        0x00007fff8a1f3671 cfrunlooprun + 97 6   com.apple.debugsymbols          0x00007fff8ace1b8f spotlightquerythread(void*) + 463 7   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 8   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 9   libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 16: 0   libsystem_kernel.dylib          0x00007fff8f7c748a __semwait_signal + 10 1   com.apple.coresymbolication     0x00007fff882dbe67 0x7fff882c9000 + 77415 2   libsystem_pthread.dylib         0x00007fff8d7cd268 _pthread_body + 131 3   libsystem_pthread.dylib         0x00007fff8d7cd1e5 _pthread_start + 176 4   libsystem_pthread.dylib         0x00007fff8d7cb41d thread_start + 13  thread 0 crashed x86 thread state (64-bit):   rax: 0x0000000000000000  rbx: 0x0000000000000006  rcx: 0x00007fff5b27e948  rdx: 0x0000000000000000   rdi: 0x000000000000130f  rsi: 0x0000000000000006  rbp: 0x00007fff5b27e970  rsp: 0x00007fff5b27e948    r8: 0x0000000000001fff   r9: 0x00007fb8f3c38f60  r10: 0x0000000008000000  r11: 0x0000000000000206   r12: 0x00007fff8839a440  r13: 0x00007fb8f3eb68c0  r14: 0x00007fff77741300  r15: 0x00007fb8f3c23f00   rip: 0x00007fff8f7c7286  rfl: 0x0000000000000206  cr2: 0x00000001075f70e0  logical cpu:     0 error code:      0x020000b8 trap number:     133 

thank in advance.

in case same issue caused colorsenserainbow plugin installed via alcatraz. removed it, went normal.


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