MappingModelCompile failed with a nonzero exit code

Question

mickey.lyke OP

Created Jan ’21

Replies 2

Boosts 0

Participants 1

A very strange error occurs when a certain team member tries to compile our codebase on his mac book:

Code Block MappingModelCompile /Users/user/Library/Developer/Xcode/DerivedData/App-azadclhkqltedgctpzfegyczvdip/Build/Products/Debug-iphonesimulator/AppCore.framework/CustomMigration.cdm /Users/user/Documents/Projects/company/ios/AppCore/Model/Mappings/CustomMigration.xcmappingmodel (in target 'AppCore' from project 'App')
    cd /Users/user/Documents/Projects/company/ios
    /Applications/Xcode.app/Contents/Developer/usr/bin/mapc --sdkroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator14.3.sdk --iphonesimulator-deployment-target 12.2 --module AppCore /Users/user/Documents/Projects/company/ios/AppCore/Model/Mappings/CustomMigration.xcmappingmodel /Users/user/Library/Developer/Xcode/DerivedData/App-azadclhkqltedgctpzfegyczvdip/Build/Products/Debug-iphonesimulator/AppCore.framework/CustomMigration.cdm
2021-01-12 10:04:18.640 mapc[23525:139372] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -predicateFormat only defined for abstract class.  Define -[NSFetchRequestExpression predicateFormat]!'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff204b76af exceptionPreprocess + 242
	1   libobjc.A.dylib                     0x00007fff201ef3c9 objc_exception_throw + 48
	2   Foundation                          0x00007fff2143a610 _NSRequestConcreteObject + 0
	3   Foundation                          0x00007fff212d9520 -[NSExpression predicateFormat] + 39
	4   IDEModelFoundation                  0x000000010b03f34f -[XDDevEntityMapping sourceExpressionAsString] + 48
	5   IDEModelFoundation                  0x000000010b0080c3 -[XDMappingCompilerSupport generateCompileResultForMappingModel:sourceModelHashes:destinationModelHashes:] + 1942
	6   IDEModelFoundation                  0x000000010b008d24 -[XDMappingCompilerSupport compileSourcePath:options:] + 1211
	7   mapc                                0x000000010a68d553 main + 2074
	8   libdyld.dylib                       0x00007fff20360621 start + 1
)
libcabi.dylib: terminating with uncaught exception of type NSException
Command MappingModelCompile failed with a nonzero exit code

Even a clean checkout with force-removed DerivedData ends up with this. Strangely enough, at the same time all others and CI are able to build just fine.

We are using Xcode 12.3 Build 12C33.

I've tried to find anything about this on the internet but it seems to be a very exotic case. Any suggestions are highly appreciated.

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Answer 1

mickey.lyke OP

Feb ’21

We have gained some insights:

This problem occurs on Big Sur only.

The mapping model causing the above error contains a custom source fetch expression.

When working with a mapping model in Xcode on Big Sur and trying to add or edit a custom source fetch expression Xcode crashes.

Big Sur 11.0.1 (20B50)
Xcode Version 12.4 (12D4e)

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Answer 2

mickey.lyke OP

Feb ’21

The problem still exists with Xcode 12.4 (12D4e) on macOS 11.2 (20D64)

0