SolvedCoreStore Build fails on Xcode 8 / macOS Sierra (both for Swift 2.3 and 3)

When trying to build CoreStore via Carthage (for use in one of my iOS apps) I'm running into this compiler crash:

Stored value type does not match pointer operand type!
  store %C9CoreStore21CSBaseDataTransaction* %23, %C9CoreStore28CSSynchronousDataTransaction** %0, align 8, !dbg !2529
 %C9CoreStore28CSSynchronousDataTransaction*LLVM ERROR: Broken function found, compilation aborted!
2016-10-20 13:46:56.454 xcodebuild[69083:526859]  DVTAssertions: Warning I in /Library/Caches/
Details:  Unable to read diagnostics from file "/Users/shirk/Library/Developer/Xcode/DerivedData/CoreStore-dibsnzstxqdaakfnrpbesflgtiep/Build/Intermediates/" (Invalid File): Invalid diagnostics signature
Function: void XCGenerateDiagnosticsFromFile(NSString *__strong, NSString *__strong, NSDictionary *__strong, NSDictionary *__strong, IDEActivityLogSectionRecorder *__strong, BOOL (^__strong)(IDEActivityLogMessage *__strong))
Thread:   <NSThread: 0x7fbbc7b16f40>{number = 15, name = (null)}
Please file a bug at with this warning message and any useful information you can provide.

Command /Applications/ failed with exit code 1

The following build commands failed:
    CompileSwift normal x86_64
    CompileSwiftSources normal x86_64

Looking around the net this seems to be an issue with the swift compiler itself, but one that can be worked around be the code that triggers it.

I know it's not the fault of CoreStore but as it is I can't build the framework in any version (master / 2.1.0 / swift_3) and there is no saying when a fixed swift compiler will be included in a new Xcode release.

33 Answers

✔️Accepted Answer

Thank you to everyone who helped debug the problem here and over at the slack channel!
I turned off whole-module-optimization for the develop and swift3_develop branch.
Please try if it works for you (make sure to delete Carthage's cache)

If the develop branch works fine I'll merge to the master branch and update the version tags.

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