[swift-users] Undefined symbols for architecture x86_64

[Ryan Lovelett]

When linking a Cocoa framework using the release configuration I am
getting the error below. Oddly compiling in the debug configuration
works fine.

The code looks like this:

let _ = URLComponents(url: track.request.url, resolvingAgainstBaseURL:
true)? .queryItems?.sorted(isOrderedBefore: { $0.name < $1.name })

Weirder still, if I make a fresh project that contains just this single
line of code then it also compiles fine (debug and release). Not sure
how to resolve the linker error. Also not sure how to get it to a small
isolated test. Xcode Version 8.0 beta 3 (8S174q)

Suggestions?

> Ld /Users/ryan/Library/Developer/Xcode/DerivedData/VHS-dosminuksbrtjudnsmhzbgzhsbib/Build/Products/Release/VHS.framework/Versions/A/VHS normal x86_64
>    cd /Users/ryan/Source/VHS
>    export MACOSX_DEPLOYMENT_TARGET=10.12
>    /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -dynamiclib -isysroot /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -L/Users/ryan/Library/Developer/Xcode/DerivedData/VHS-dosminuksbrtjudnsmhzbgzhsbib/Build/Products/Release -F/Users/ryan/Library/Developer/Xcode/DerivedData/VHS-dosminuksbrtjudnsmhzbgzhsbib/Build/Products/Release -F/Users/ryan/Source/VHS/Carthage/Build/Mac -filelist /Users/ryan/Library/Developer/Xcode/DerivedData/VHS-dosminuksbrtjudnsmhzbgzhsbib/Build/Intermediates/VHS.build/Release/VHS.build/Objects-normal/x86_64/VHS.LinkFileList -install_name @rpath/VHS.framework/Versions/A/VHS -Xlinker -rpath -Xlinker @executable_path/../Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -mmacosx-version-min=10.12 -fobjc-link-runtime -L/Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx -Xlinker -add_ast_path -Xlinker /Users/ryan/Library/Developer/Xcode/DerivedData/VHS-dosminuksbrtjudnsmhzbgzhsbib/Build/Intermediates/VHS.build/Release/VHS.build/Objects-normal/x86_64/VHS.swiftmodule -framework Argo -framework Curry -single_module -compatibility_version 1 -current_version 1 -Xlinker -dependency_info -Xlinker /Users/ryan/Library/Developer/Xcode/DerivedData/VHS-dosminuksbrtjudnsmhzbgzhsbib/Build/Intermediates/VHS.build/Release/VHS.build/Objects-normal/x86_64/VHS_dependency_info.dat -o /Users/ryan/Library/Developer/Xcode/DerivedData/VHS-dosminuksbrtjudnsmhzbgzhsbib/Build/Products/Release/VHS.framework/Versions/A/VHS
> Undefined symbols for architecture x86_64:
>   "Swift.UnsafeMutableBufferPointer.(subscript.materializeForSet : (Swift.Int) -> A).(closure #1)", referenced from:
>       function signature specialization <Arg[2] = Exploded> of generic specialization <Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> with Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> : Swift.MutableCollection in Swift and Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> : Swift.RandomAccessCollection in Swift> of Swift._siftDown <A where A: Swift.MutableCollection, A: Swift.RandomAccessCollection> (inout A, index : A.Index, subRange : Swift.Range<A.Index>, isOrderedBefore : inout (A.Iterator.Element, A.Iterator.Element) -> Swift.Bool) -> () in VCR.o
>       function signature specialization <Arg[1] = Exploded> of generic specialization <Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> with Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> : Swift.MutableCollection in Swift and Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> : Swift.RandomAccessCollection in Swift> of Swift._heapSort <A where A: Swift.MutableCollection, A: Swift.RandomAccessCollection> (inout A, subRange : Swift.Range<A.Index>, isOrderedBefore : inout (A.Iterator.Element, A.Iterator.Element) -> Swift.Bool) -> () in VCR.o
>       function signature specialization <Arg[1] = Exploded> of generic specialization <Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> with Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> : Swift.MutableCollection in Swift and Swift.UnsafeMutableBufferPointer<Foundation.URLQueryItem> : Swift.RandomAccessCollection in Swift> of Swift._partition <A where A: Swift.MutableCollection, A: Swift.RandomAccessCollection> (inout A, subRange : Swift.Range<A.Index>, isOrderedBefore : inout (A.Iterator.Element, A.Iterator.Element) -> Swift.Bool) -> A.Index in VCR.o
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see invocation)