Open Radar

I am also experiencing this. I was getting it with the Xcode 7 beta 6 release so I ditched it. Previous beta releases were okay and ran alongside an Xcode 6.4 installation. I installed the Xcode 7 GM a couple of days ago and it was running okay for a day or two, but started crashing today. I am not using Cocoapods. I did just empty the ~/Library/Developer/CoreSimulator/Devices folder to get rid of duplicated simulators, but couldn't fix the issue when I restored this folder, so don't know if its related or not. Also tried reinstalling Xcode - no dice. Next step - install the El Capitan GM seed. If that doesn't work, then I'll have to reinstall Xcode 6.4. This is project-related. It crashes when opening a particular project - when indexing the files. Other projects are okay.

FIX: Installing Xcode 7.1 beta (7B60) fixes this issue.

Me too

Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY

Application Specific Information: ProductBuildVersion: 7A218 ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEXcode3ProjectSupport/IDEXcode3ProjectSupport-8184/Xcode3Core/LegacyProjects/Frameworks/DevToolsCore/DevToolsCore/TargetSnapshots/XCBuildFileRefDGSnapshot.m:474 Details: Cannot call addBuildFileRef: when file refs are frozen Object: Method: -addBuildFileRef: Thread: {number = 12, name = (null)} Hints: None Backtrace: 0 0x0000000106cf3904 -IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments: 1 0x00000001058be23e DVTAssertionHandler (in DVTFoundation) 2 0x00000001058be455 DVTAssertionFailureHandler (in DVTFoundation) 3 0x000000010e282234 -XCBuildFileRefArrayDGSnapshot addBuildFileRef: 4 0x000000010e25ec5f -XCBuildPhaseDGSnapshot(DependencyGraphCreation) groupDependencyNode:ifNecessaryForLaterProcessingWithMacroExpansionScope: 5 0x000000010e272e64 -XCSourcesBuildPhaseDGSnapshot(DependencyGraphCreation) _processOutputNodes:forRegionVariantName:processedPaths:originalBuildRule:withMacroExpansionScope: 6 0x000000010e271667 -XCSourcesBuildPhaseDGSnapshot(DependencyGraphCreation) _computeDependenciesForBuildFileReference:usingBuildRule:withMacroExpansionScope:processedPaths: 7 0x000000010e273b1e -XCSourcesBuildPhaseDGSnapshot(DependencyGraphCreation) computeDependenciesForBuildFileReference:usingBuildRule:withMacroExpansionScope: 8 0x000000010e273fcb -XCSourcesBuildPhaseDGSnapshot(DependencyGraphCreation) computeDependenciesForBuildFileReference:withMacroExpansionScope: 9 0x000000010e25f694 -XCBuildPhaseDGSnapshot(DependencyGraphCreation) computeDependenciesForAllBuildFileReferencesWithMacroExpansionScope: 10 0x000000010e276baf -XCSourcesBuildPhaseDGSnapshot(DependencyGraphCreation) computeDependenciesForAllBuildFileReferencesWithMacroExpansionScope: 11 0x000000010e277f95 -XCSourcesBuildPhaseDGSnapshot(DependencyGraphCreation) computeDependenciesWithMacroExpansionScope: 12 0x000000010e1ae6b5 -XCProductTypeSpecification computeDependenciesWithMacroExpansionScope: 13 0x000000010e258000 -XCNativeTargetDGSnapshot(DependencyGraphCreation) computeDependenciesWithMacroExpansionScope: 14 0x000000010e12b455 -PBXTargetBuildContext createDependencyGraphWithTargetDGSnapshot: 15 0x000000010e147677 -PBXTargetBuildContext(DependencyGraphEvents) dg_setTargetSnapshot: 16 0x000000010e146d3c -PBXTargetBuildContext(DependencyGraphEvents) processDependencyGraphEvents 17 0x000000010e1a6342 -XCBlockQueue _processNextBlockInThreadSlotNumber: 18 0x000000010e1a65c4 -XCBlockQueue _processBlocksInThreadSlotNumber: 19 0x00007fff8bf0b084 __NSThreadstart (in Foundation) 20 0x00007fff832bf9b1 pthreadbody (in libsystem_pthread.dylib) 21 0x00007fff832bf92e pthreadbody (in libsystem_pthread.dylib) 22 0x00007fff832bd385 thread_start (in libsystem_pthread.dylib)

abort() called

I'm also experiencing this same crash, same backtrace with the Xcode 7.0 GM Seed release just released yesterday

ProductBuildVersion: 7A218, Running under OS X 10.10.4

The project is one originally created with Xcode 4 I believe - but dutifully updated to Xcode 5 and Xcode 6 with no issues.. The project has some storyboards with autolayout turned off if that matters (for stuff that occurred before AutoLayout existed)

I cannot answer for the original reporter, however we do not use Cocoapods.

ProductBuildVersion: 7A218
ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEXcode3ProjectSupport/IDEXcode3ProjectSupport-8184/Xcode3Core/LegacyProjects/Frameworks/DevToolsCore/DevToolsCore/TargetSnapshots/XCBuildFileRefDGSnapshot.m:474
Details:  Cannot call addBuildFileRef: when file refs are frozen
Object:   <XCBuildFileRefArrayDGSnapshot: 0x7feea9e76c50>
Method:   -addBuildFileRef:
Thread:   <NSThread: 0x7fee9fe21cd0>{number = 10, name = (null)}
Hints:   None
Backtrace:
  0  0x000000011099e904 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit)
  1  0x000000010f56b23e _DVTAssertionHandler (in DVTFoundation)
  2  0x000000010f56b455 _DVTAssertionFailureHandler (in DVTFoundation)
  3  0x0000000119180234 -[XCBuildFileRefArrayDGSnapshot addBuildFileRef:] (in DevToolsCore)
  4  0x000000011915cc5f -[XCBuildPhaseDGSnapshot(DependencyGraphCreation)

Are you using Cocoapods by chance?