xcode - 合并 .swiftmodule 因段错误而失败

Question

xcodebuild 失败并出现以下错误:

<unknown>:0: error: unable to execute command: Segmentation fault: 11
<unknown>:0: error: merge-module command failed due to signal (use -v to see invocation)
** BUILD FAILED **


The following build commands failed:
    MergeSwiftModule normal arm64 /Users/vmanot/Documents/Xcode/Projects/Frameworks/ExSwift/build/ExSwift.build/Release-iphoneos/ExSwift.build/Objects-normal/arm64/ExSwift.swiftmodule
    CompileSwiftSources normal arm64 com.apple.xcode.tools.swift.compiler
(2 failures)

(上面提到的ExSwift不是开源ExSwift，而是一个私有(private)框架)。

堆栈跟踪:

0  swift                    0x0000000104229edb llvm::sys::PrintStackTrace(__sFILE*) + 43
1  swift                    0x000000010422a61b SignalHandler(int) + 379
2  libsystem_platform.dylib 0x00007fff8e88152a _sigtramp + 26
3  libsystem_platform.dylib 0x00007fff5d8c0070 _sigtramp + 3473140576
4  swift                    0x000000010268b19e swift::serialization::Serializer::writeSubstitutions(llvm::ArrayRef<swift::Substitution>, std::__1::array<unsigned int, 256ul> const&) + 350
5  swift                    0x000000010268a9dc swift::serialization::Serializer::writeNormalConformance(swift::NormalProtocolConformance const*) + 2684
6  swift                    0x000000010269597b swift::serialization::Serializer::writeAllDeclsAndTypes() + 8043
7  swift                    0x0000000102696949 swift::serialization::Serializer::writeAST(llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>) + 2505
8  swift                    0x0000000102698f47 swift::serialization::Serializer::writeToStream(llvm::raw_ostream&, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::SILModule const*, swift::SerializationOptions const&) + 135
9  swift                    0x0000000102699b82 withOutputFile(swift::ASTContext&, llvm::StringRef, llvm::function_ref<void (llvm::raw_ostream&)>) + 226
10 swift                    0x0000000102699a06 swift::serialize(llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::SerializationOptions const&, swift::SILModule const*) + 214
11 swift                    0x000000010233b54b performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&) + 12843
12 swift                    0x000000010233810a frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 2682
13 swift                    0x0000000102334797 main + 2247
14 libdyld.dylib            0x00007fff9d9a35ad start + 1
15 libdyld.dylib            0x0000000000000108 start + 1650838364

如何定位错误代码？

Answer 1

我认为此错误的来源可能千差万别，取决于您编写的 Swift 源代码。我在尝试为符合 UIPickerViewDataSource 的自定义协议(protocol)编写扩展时收到此错误。具体来说，我正在为 numberOfComponentsInPickerView(_:) 和 pickerView(_:numberOfRowsInComponent:) 编写默认实现。

我无法确认，但我怀疑我们遇到的错误与 Objective-C 互操作性有关。我唯一确定的是，将这些实现从协议(protocol)移到符合标准的类中为我修复了错误。

编辑:按照 Bruno 的建议更改优化级别没有帮助。