crash - Xcode 6.1 crashes whenever I use Interface Builder -

nothing works. open interface builder on multiple different projects, cause crash. same exception. tried various solutions suggested on google & so, such clearing derived folder (i cleared whole ~/library/developer/xcode/* tree still nothing). i'm lost, , it's halting development me.

i opened support ticket on developer.apple.com, haven't gotten reply yet (been 4-5 days now).

process:               xcode [10292] path:                  /applications/xcode.app/contents/macos/xcode identifier:            com.apple.dt.xcode version:               6.1 (6604) build info:            ideframeworks-6604000000000000~2 app item id:           497799835 app external id:       752282650 code type:             x86-64 (native) parent process:        ??? [1] responsible:           xcode [10292] user id:               501  date/time:             2014-11-27 11:48:15.688 +0200 os version:            mac os x 10.10.1 (14b25) report version:        11 anonymous uuid:        f1e42fb4-8cfc-e112-4f9a-3286a610d4a0  sleep/wake uuid:       817ab1fe-f61f-4359-a845-094095ff399a  time awake since boot: 70000 seconds time since wake:       4700 seconds  crashed thread:        0  dispatch queue: com.apple.main-thread  exception type:        exc_crash (sigabrt) exception codes:       0x0000000000000000, 0x0000000000000000  application specific information: productbuildversion: 6a1052d assertion failure in /sourcecache/ideinterfacebuilder/ideinterfacebuilder-6250/interfacebuilderkit/document/ibdocument.m:5597 details:  pasteboard doesn't have data type: ibnsobjectpbtype! object:   <ibxibdocument: 0x7fcbb65d9200> method:   -insertobjectsfrompasteboard:oftype:aschildrenofobject:atindex:context:finishextractingobjectsblock: thread:   <nsthread: 0x7fcbb3c389e0>{number = 1, name = main} hints:   none backtrace:   0  0x00000001024199ea -[ideassertionhandler handlefailureinmethod:object:filename:linenumber:assertionsignature:messageformat:arguments:] (in idekit)   1  0x00000001011d7d1f _dvtassertionhandler (in dvtfoundation)   2  0x00000001011d800e _dvtassertionfailurehandler (in dvtfoundation)   3  0x000000010b2afcc8 -[ibdocument insertobjectsfrompasteboard:oftype:aschildrenofobject:atindex:context:finishextractingobjectsblock:] (in ideinterfacebuilderkit)   4  0x000000010b2af253 -[ibdocument insertobjectsfrompasteboard:oftype:aschildrenofobject:atindex:context:] (in ideinterfacebuilderkit)   5  0x000000010b2b0f1d -[ibdocument decodepasteboardcontent:oftype:forinsertioninto:usingdocumentclass:anddocumenttype:context:] (in ideinterfacebuilderkit)   6  0x000000010b2b23f7 __86-[ibdocument documentwithpasteboardcloneofobjects:documentclass:documenttype:context:]_block_invoke (in ideinterfacebuilderkit)   7  0x000000010b1b9a34 +[nspasteboard(ibpasteboardadditions) invokewithtemporarypasteboard:] (in ideinterfacebuilderkit)   8  0x000000010b2b22e0 -[ibdocument documentwithpasteboardcloneofobjects:documentclass:documenttype:context:] (in ideinterfacebuilderkit)   9  0x000000010ffc5ecc -[nsobject(ibcocoaautolayoutengineadditions) ibcopyobjecthierarchyforlayoutengine:synchronousdidcopycallback:] (in ideinterfacebuildercocoaintegration)  10  0x000000010ffc6f5f -[nswindowtemplate(ibcocoaautolayoutengineadditions) ibwindowwithcopiedviewhierarchysnapshotforlayoutengine:returningaddedrepresentedconstraintsforrepresentedviews:] (in ideinterfacebuildercocoaintegration)  11  0x000000010ffc761b -[ibcocoaautolayoutengine prepareviewhierarchyandreturnaddedrepresentedconstraintsforrepresentedviews] (in ideinterfacebuildercocoaintegration)  12  0x00000001075fa556 -[ibautolayoutengine initwitharbitrationunit:options:] (in ibautolayoutfoundation)  13  0x000000010ffc7538 -[ibcocoaautolayoutengine initwitharbitrationunit:options:] (in ideinterfacebuildercocoaintegration)  14  0x0000000107603422 -[ibautolayoutframedecisiondriver initwitharbitrationunit:initialstatus:options:] (in ibautolayoutfoundation)  15  0x000000010b1dda80 -[ibautolayoutframedecider initwitharbitrationunit:driveroptions:delegate:statusinitializationblock:] (in ideinterfacebuilderkit)  16  0x000000010b1de170 +[ibautolayoutframedecider decideandsetframesofallviewhierarchieswithlayoutinfo:delegate:statusinitializationblock:] (in ideinterfacebuilderkit)  17  0x000000010b2d31e9 -[ibdocumentautolayoutmanager runblockinnewarbitrationstackentrywithbehavior:block:] (in ideinterfacebuilderkit)  18  0x000000010b2ba1f7 -[ibdocument modifyviewsinautolayoutsafewaywithoutupdatingconstraintsduring:] (in ideinterfacebuilderkit)  19  0x000000010b310670 -[ibdocumentverifier verifyviewshavecorrectframes] (in ideinterfacebuilderkit)  20  0x000000010b30d2ed -[ibdocumentverifier verificationdidfinish] (in ideinterfacebuilderkit)  21  0x000000010b30d008 -[ibdocumentverifier performverification] (in ideinterfacebuilderkit)  22  0x000000010b2ac610 -[ibdocument performverification] (in ideinterfacebuilderkit)  23  0x000000010b280da2 __39-[ibdocument readfromurl:oftype:error:]_block_invoke_2 (in ideinterfacebuilderkit)  24  0x000000010b2de6e0 -[ibdocumentautolayoutmanager donotsynchronouslycomputeautolayoutstatuswhileperformingblock:] (in ideinterfacebuilderkit)  25  0x000000010b280bc1 __39-[ibdocument readfromurl:oftype:error:]_block_invoke (in ideinterfacebuilderkit) 

it has autolayout.

1- right click storyboard file -> open -> source code find , remove useautolayout="yes"

2- right click storyboard file -> open -> interface builder

this worked in case, however, i'm unable autolayout work :)

please refer answer: https://stackoverflow.com/a/26474823/1231121

edit 1:

after many tries , searches managed resolved by:

1- remove xcode.app (from terminal sudo rm -rf /applications/xcode.app/)

2- install again

3- restarted mbp

then work expected.

edit 2:

it happened again, mac restart resolved it!