xcodebuild (XCode 7.1) - unexpected successful exit code from cancelled command

I'm getting the following during the bundle resources copying phase in xcodebuild (XCode 7.1):


2015-11-03 22:16:28.218 xcodebuild[28202:300463] DVTAssertions: Warning in /Library/Caches/com.apple.xbs/Sources/IDEXcode3ProjectSupport/IDEXcode3ProjectSupport-9061/Xcode3Core/LegacyProjects/Frameworks/DevToolsCore/DevToolsCore/BuildSystem/Runtime/PBXTargetBuildContext.mm:739 Details: unexpected successful exit code from cancelled command

<C0505:'CpResource Foo.json':P10>
Object:
<PBXTargetBuildContext: 0x7faec015a440>
Method:

-createCommandInvocationRecordFromInvocation:
Thread:
<NSThread: 0x7faebc8cc070>
{number = 10, name = (null)} Please file a bug at http://bugreport.apple.com with this warning message and any useful information you can provide.


I have ~170 items I'm copying, but for some reason a few of them give me this error.

This is not deterministic - it happens most of the time, but sometimes not.

The issue was a duplicate folder in the Copy Bundle Resources section. For more information see http://stackoverflow.com/questions/33508429/xcodebuild-xcode-7-1-unexpected-successful-exit-code-from-cancelled-command/33596050#33596050.

xcodebuild (XCode 7.1) - unexpected successful exit code from cancelled command
 
 
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