升级Xcode 14后SwiftCompile编译失败求助

因UI存在Bug，升级至Xcode 14测试iOS 16适配，但项目突然无法编译（降级回Xcode 13.4可正常编译）。已尝试移除并重新添加Swift Package依赖、清理派生数据、重启Xcode及Mac，均未解决问题。

构建错误栈信息： #

4.  While evaluating request ExecuteSILPipelineRequest(Run pipelines { Mandatory Diagnostic Passes + Enabling Optimization Passes } on SIL for EightUsersUI)
5.  While running pass #0 SILModuleTransform "SILGenCleanup".
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  swift-frontend           0x0000000114b727f7 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 39
1  swift-frontend           0x0000000114b71828 llvm::sys::RunSignalHandlers() + 248
2  swift-frontend           0x0000000114b72e10 SignalHandler(int) + 288
3  libsystem_platform.dylib 0x00007ff800d3adfd _sigtramp + 29
4  swift-frontend           0x000000010f98cc0e std::__1::__function::__func<swift::evaluator::PerRequestCache swift::evaluator::PerRequestCache::makeEmpty<swift::ProvideDefaultImplForRequest>()::'lambda'(void*), std::__1::allocator<swift::evaluator::PerRequestCache swift::evaluator::PerRequestCache::makeEmpty<swift::ProvideDefaultImplForRequest>()::'lambda'(void*)>, void (void*)>::operator()(void*&&) + 46
5  swift-frontend           0x000000011028f4b1 swift::CanonicalizeInstruction::canonicalize(swift::SILInstruction*) + 49
6  swift-frontend           0x00000001100fda24 (anonymous namespace)::SILGenCleanup::run() + 388
7  swift-frontend           0x000000011011ed35 swift::SILPassManager::executePassPipelinePlan(swift::SILPipelinePlan const&) + 3077
8  swift-frontend           0x000000011013b8fc swift::SimpleRequest<swift::ExecuteSILPipelineRequest, std::__1::tuple<> (swift::SILPipelineExecutionDescriptor), (swift::RequestFlags)1>::evaluateRequest(swift::ExecuteSILPipelineRequest const&, swift::Evaluator&) + 60
9  swift-frontend           0x0000000110127e69 llvm::Expected<swift::ExecuteSILPipelineRequest::OutputType> swift::Evaluator::getResultUncached<swift::ExecuteSILPipelineRequest>(swift::ExecuteSILPipelineRequest const&) + 537
10 swift-frontend           0x0000000110129f3b swift::runSILDiagnosticPasses(swift::SILModule&) + 187
11 swift-frontend           0x000000010f7ae551 swift::CompilerInstance::performSILProcessing(swift::SILModule*) + 65
12 swift-frontend           0x000000010f72f6c6 performCompileStepsPostSILGen(swift::CompilerInstance&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> >, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) + 1110
13 swift-frontend           0x000000010f7319b5 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 5701
14 swift-frontend           0x000000010f6c78ea swift::mainEntry(int, char const**) + 3082
15 dyld                     0x00000001258d852e start + 462
Command SwiftCompile failed with a nonzero exit code

可能的解决方向： #

• 排查项目中自定义属性包装器、复杂泛型、函数式语法，这类代码易触发Swift 5.7（Xcode14默认版本）的SIL优化阶段Bug
• 临时调整优化级别：在Build Settings中找到Optimization Level，Debug模式设为No Optimization [-Onone]，Release模式将Fast, Whole Module Optimization改为Fast, Single-File Optimization
• 定位可疑代码：注释掉近期新增的Swift代码（尤其是涉及可选链嵌套、Result类型、闭包捕获变量的部分），逐步编译排查
• 更新所有Swift Package依赖到最新版本，部分第三方库可能存在Xcode14兼容问题
• 尝试新建Xcode14项目，逐步迁移原项目代码与依赖，判断是配置问题还是代码兼容问题
• 若确认是编译器Bug，可向Apple反馈中心提交报告，同时保留Xcode13.4作为临时开发环境

内容的提问来源于stack exchange，提问作者xplat