Hey swift-users, I'm experiencing a linking issue that causes builds to sometimes complete and sometimes fail, without code changes. I'm not sure if the problem is with Swift, Xcode, or my usage of either.
My Xcode 7.3 project target is a Swift framework with no dependencies other than Foundation. Compiling always succeeds, but linking fails about 75% of the time with errors like the following: Undefined symbols for architecture x86_64: "__TWPuRx16ostrichframework11OperandTypexS_8ReadablexS_9WriteablewxPS1_8ReadTypezVs6UInt16wxPS2_9WriteTypezS4_ERRzS4_ERRzS4_ERRzSiERRzSiERRzSiERRzSirGVS_5DEC16x_S_11InstructionS_", referenced from: ostrichframework.Z80.getInstruction () -> ostrichframework.Instruction? in Z80.o ld: symbol(s) not found for architecture x86_64 The other 25% of the time, the framework will be built fine, with its user application working as expected. Has anyone experienced issues like this, or does anyone have advice on troubleshooting it? I've tried cleaning, deleting DerivedData, and building on a different machine, to no avail. If it helps, the failing project is "ostrichframework" found in the Xcode workspace here: https://github.com/PumpMagic/ostrich Any help is greatly appreciated. Ryan
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