I also faced this issue since Xcode 14.3 Xcode 14.2 It works fine Swift Optimization with -Onone is working. But -O is not working. I also posted it https://github.com/apple/swift/issues/64859 /Users/yoshi/Library/Developer/Xcode/DerivedData/TT-galmzhtedumvzaewgvxgohgbvzou/Build/Intermediates.noindex/TT.build/App Store-iphonesimulator/TT.build/DerivedSources/GeneratedAssetSymbols.swift While evaluating request ExecuteSILPipelineRequest(Run pipelines { PrepareOptimizationPasses, EarlyModulePasses, HighLevel,Function+EarlyLoopOpt, HighLevel,Module+StackPromote, MidLevel,Function, ClosureSpecialize, LowLevel,Function, LateLoopOpt, SIL Debug Info Generator } on SIL for NinetyNine) While running pass #16730432 SILModuleTransform "DeadFunctionAndGlobalElimination". 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 0x00000001077af14c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56 1 swift-frontend 0x000000010a32df2c llvm::sys::RunSignalHandlers() + 112 2 swift-frontend 0x000000010606f10c SignalHandler(int) + 352 3 libsystem_platform.dylib 0x000000018db61a24 _sigtramp + 56 4 swift-frontend 0x0000000108e4725c (anonymous namespace)::DeadFunctionAndGlobalEliminationPass::run() (.llvm.2696310751390425970) + 432 5 swift-frontend 0x0000000108e4725c (anonymous namespace)::DeadFunctionAndGlobalEliminationPass::run() (.llvm.2696310751390425970) + 432 6 swift-frontend 0x0000000109c8708c swift::SILPassManager::executePassPipelinePlan(swift::SILPassPipelinePlan const&) + 16276 7 swift-frontend 0x0000000109e0af90 swift::SimpleRequest<swift::ExecuteSILPipelineRequest, std::__1::tuple<> (swift::SILPipelineExecutionDescriptor), (swift::RequestFlags)1>::evaluateRequest(swift::ExecuteSILPipelineRequest const&, swift::Evaluator&) + 56 8 swift-frontend 0x0000000109cc07e4 llvm::Expectedswift::ExecuteSILPipelineRequest::OutputType swift::Evaluator::getResultUncachedswift::ExecuteSILPipelineRequest(swift::ExecuteSILPipelineRequest const&) + 476 9 swift-frontend 0x0000000109cdd074 swift::runSILOptimizationPasses(swift::SILModule&) + 472 10 swift-frontend 0x000000010578614c swift::CompilerInstance::performSILProcessing(swift::SILModule*) + 572 11 swift-frontend 0x0000000109bc3328 performCompileStepsPostSILGen(swift::CompilerInstance&, std::__1::unique_ptr<swift::SILModule, std::__1::default_deleteswift::SILModule>, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) + 956 12 swift-frontend 0x000000010a2e5e14 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 3020 13 swift-frontend 0x000000010a2e9474 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 4568 14 swift-frontend 0x0000000109c2f4e0 swift::mainEntry(int, char const**) + 4116 15 dyld 0x000000018d7b9058 start + 2224

Have you solved this issue?

Any update? Xcode 14.2, I still have this issue

Do you resolve it?

Xcode 13.3.1, I can't create a workflow