swift linking

Load command 12
          cmd LC_LOAD_DYLIB
      cmdsize 80
         name @executable_path/../Frameworks/libSwiftSyntax.dylib (offset 24)
   time stamp 2 Thu Jan  1 01:00:02 1970
      current version 0.0.0
compatibility version 0.0.0
Load command 43
          cmd LC_RPATH
      cmdsize 32
         path /usr/lib/swift (offset 12)
Load command 44
          cmd LC_RPATH
      cmdsize 48
         path @executable_path/../Frameworks (offset 12)
         
$ otool -L libSwiftSyntax.dylib
libSwiftSyntax.dylib:
	@executable_path/../Frameworks/libSwiftSyntax.dylib (compatibility version 0.0.0, current version 0.0.0)
	/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.200.5)
	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1560.12.0)
	/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation (compatibility version 300.0.0, current version 1560.12.0)
	@rpath/lib_InternalSwiftSyntaxParser.dylib (compatibility version 1.0.0, current version 0.0.0)
	@rpath/libswiftCore.dylib (compatibility version 1.0.0, current version 0.0.0)
	@rpath/libswiftCoreFoundation.dylib (compatibility version 1.0.0, current version 0.0.0)
	@rpath/libswiftCoreGraphics.dylib (compatibility version 1.0.0, current version 0.0.0)
	@rpath/libswiftDarwin.dylib (compatibility version 1.0.0, current version 0.0.0)
	@rpath/libswiftDispatch.dylib (compatibility version 1.0.0, current version 0.0.0)
	@rpath/libswiftFoundation.dylib (compatibility version 1.0.0, current version 0.0.0)
	@rpath/libswiftIOKit.dylib (compatibility version 1.0.0, current version 0.0.0)
	@rpath/libswiftObjectiveC.dylib (compatibility version 1.0.0, current version 0.0.0)


Runtime loads from toolchain: usr/lib/swift/macosx/libSwiftSyntax.dylib

dyld: Symbol not found: _$s11SwiftSyntax0B6ParserO5parse6source0D10Transition22filenameForDiagnostics16diagnosticEngineAA010SourceFileB0VSS_AA016IncrementalParseF0CSgSSAA010DiagnosticK0CSgtKFZ
  Referenced from: /Users/marcinkrzyzanowski/Devel/SwiftStudio/DerivedData/SwiftStudio/Build/Products/Debug/SwiftStudio.app/Contents/MacOS/SwiftStudio
  Expected in: /Library/Developer/Toolchains/swift-DEVELOPMENT-SNAPSHOT-2019-03-04-a.xctoolchain/usr/lib/swift/macosx/libSwiftSyntax.dylib
  
Workaround: 
 If I delete /Library/Developer/Toolchains/swift-DEVELOPMENT-SNAPSHOT-2019-03-04-a.xctoolchain/usr/lib/swift/macosx/libSwiftSyntax.dylib then it links as expected.

Use env DYLD_PRINT_RPATHS=1 to see how dyld does the lookups.