After migrating to Xcdoe 10 and Swift 4.2, I get a compilation error:
1. While deserializing SIL global "UIEdgeInsetsZero"
error: Abort trap: 6
With stack strace :
*** DESERIALIZATION FAILURE (please include this section in any bug report) ***
result is ambiguous
0 swift 0x000000010ae42c5a PrintStackTraceSignalHandler(void*) + 42
1 swift 0x000000010ae42066 SignalHandler(int) + 966
2 libsystem_platform.dylib 0x00007fff7fe6cf5a _sigtramp + 26
3 libsystem_platform.dylib 0x0000000117e1c558 _sigtramp + 2549806616
4 libsystem_c.dylib 0x00007fff7fc0a1ae abort + 127
5 swift 0x00000001082e899b swift::ModuleFile::fatal(llvm::Error) + 1915
6 swift 0x00000001083204d2 swift::SILDeserializer::readGlobalVar(llvm::StringRef) + 1890
7 swift 0x00000001083caf9a swift::SerializedSILLoader::getAllForModule(swift::Identifier, swift::FileUnit*) + 234
8 swift 0x000000010711ddbe performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 34750
9 swift 0x000000010711210f swift::performFrontend(llvm::ArrayRef, char const*, void*, swift::FrontendObserver*) + 7839
10 swift 0x00000001070bbc48 main + 13144
11 libdyld.dylib 0x00007fff7fb5e015 start + 1