在我的UIViewExtension.swift文件中添加一个(方便的)计算的height属性到UIView会导致Swift编译器segfault …什么可能会出错?
0 swift 0x00000001061e5608 llvm::sys::printstacktrace(__sFILE*) + 40 1 swift 0x00000001061e5af4 SignalHandler(int) + 452 2 libsystem_platform.dylib 0x00007fff894da5aa _sigtramp + 26 3 libsystem_platform.dylib 0xb03939841e997c88 _sigtramp + 2504775416 4 swift 0x00000001064c8bb9 swift::NominalTypeDecl::getMembers(bool) const + 41 5 swift 0x00000001055efab9 swift::irgen::ClassMetadataLayout<(anonymous namespace)::FindClassMethodindex>::addClassMembers(swift::ClassDecl*) + 329 6 swift 0x00000001055e97b2 swift::irgen::emitVirtualMethodValue(swift::irgen::IRGenFunction&,llvm::Value*,swift::SILType,swift::SILDeclRef,swift::CanTypeWrapper<swift::SILFunctionType>,swift::ResilienceExpansion) + 434 7 swift 0x00000001056550d3 swift::SILVisitor<(anonymous namespace)::IRGenSILFunction,void>::visit(swift::ValueBase*) + 42611 8 swift 0x000000010564a266 swift::irgen::IRGenModule::emitSILFunction(swift::SILFunction*) + 8678 9 swift 0x00000001055cb6f8 swift::irgen::IRGenModule::emitGlobalTopLevel() + 184 10 swift 0x00000001056376e3 performIRGeneration(swift::IRGenoptions&,swift::Module*,swift::SILModule*,llvm::StringRef,llvm::LLVMContext&,swift::SourceFile*,unsigned int) + 1859 11 swift 0x0000000105638033 swift::performIRGeneration(swift::IRGenoptions&,swift::SourceFile&,unsigned int) + 51 12 swift 0x00000001055aa65a frontend_main(llvm::ArrayRef<char const*>,char const*,void*) + 4842 13 swift 0x00000001055a935d main + 1533 14 libdyld.dylib 0x00007fff8a82e5fd start + 1
1. While emitting IR SIL function @_TFCSo6UIViewg6heightSd for 'anonname=0x7ff422892fd0' at <path redacted>/UIViewExtension.swift:60:5 <unkNown>:0: error: unable to execute command: Segmentation fault: 11 <unkNown>:0: error: swift frontend command Failed due to signal (use -v to see invocation) Command /Applications/Xcode6-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift Failed with exit code 254
如果需要更多的信息来破解这个,只是评论。谢谢!
编辑:
这里是一个相关的.xcodeproj返回这个问题的编译器错误。 Download here
我有这个错误,因为我这样做:
if(currentMeal?.State == .Deleted){ }
代替
if(currentMeal!.State == .Deleted){ }
所以我认为可选未解包在if条件可能会导致此错误
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