import Foundation

extension FileManager {
    func safeCreateDirectory(at URL: URL) throws(NSError) {
        do {
            try self.createDirectory(at: URL, withIntermediateDirectories: true)
        } catch let error as NSError {
            if error.code == NSFileWriteFileExistsError {
                return
            } else {
                throw error
            }
        }
    }
    func safeRemoveDirectory(atPath path: String) throws(NSError) {
        do {
            try self.removeItem(atPath: path)
        } catch let error as NSError {
            if error.code == NSFileNoSuchFileError {
                return
            } else {
                throw error
            }
        }
    }
}

$ swiftc test_filemanager.swift


error: compile command failed due to signal 11 (use -v to see invocation)
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0.	Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file test_filemanager.swift -target x86_64-apple-macosx15.0 -enable-objc-interop -stack-check -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk -color-diagnostics -swift-version 6 -new-driver-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-driver -empty-abi-descriptor -resource-dir /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift -module-name test_filemanager -disable-clang-spi -target-sdk-version 15.4 -target-sdk-name macosx15.4 -external-plugin-path /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/local/lib/swift/host/plugins#/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -in-process-plugin-server-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -plugin-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins -plugin-path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/local/lib/swift/host/plugins -o /var/folders/7k/w6t7s2gj1zld4ny76qd58tph0000gn/T/TemporaryDirectory.BBiaAr/test_filemanager-1.o
1.	Apple Swift version 6.1 (swiftlang-6.1.0.110.21 clang-1700.0.13.3)
2.	Compiling with the current language version
3.	While evaluating request ASTLoweringRequest(Lowering AST to SIL for file "test_filemanager.swift")
4.	While silgen emitFunction SIL function "@$sSo13NSFileManagerC16test_filemanagerE19safeCreateDirectory2aty10Foundation3URLV_tSo7NSErrorCYKF".
 for 'safeCreateDirectory(at:)' (at test_filemanager.swift:4:5)
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  swift-frontend           0x0000000112df8708 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 40
1  swift-frontend           0x0000000112df6039 llvm::sys::RunSignalHandlers() + 233
2  swift-frontend           0x0000000112df8cee SignalHandler(int) + 302
3  libsystem_platform.dylib 0x00007ff819cb625d _sigtramp + 29
4  libsystem_platform.dylib 000000000000000000 _sigtramp + 18446603370148175296
5  swift-frontend           0x000000010ca5fff0 swift::Lowering::SILGenFunction::emitThrow(swift::SILLocation, swift::Lowering::ManagedValue, bool) + 3648
6  swift-frontend           0x000000010ca1d98b std::__1::__function::__func<swift::Lowering::SILGenFunction::emitCatchDispatch(swift::DoCatchStmt*, swift::Lowering::ManagedValue, llvm::ArrayRef<swift::CaseStmt*>, swift::Lowering::JumpDest)::$_1, std::__1::allocator<swift::Lowering::SILGenFunction::emitCatchDispatch(swift::DoCatchStmt*, swift::Lowering::ManagedValue, llvm::ArrayRef<swift::CaseStmt*>, swift::Lowering::JumpDest)::$_1>, void (swift::SILLocation)>::operator()(swift::SILLocation&&) + 443
7  swift-frontend           0x000000010ca180cb std::__1::__function::__func<(anonymous namespace)::PatternMatchEmission::emitDispatch((anonymous namespace)::ClauseMatrix&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, std::__1::function<void (swift::SILLocation)> const&)::$_0, std::__1::allocator<(anonymous namespace)::PatternMatchEmission::emitDispatch((anonymous namespace)::ClauseMatrix&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, std::__1::function<void (swift::SILLocation)> const&)::$_0>, void (swift::SILLocation)>::operator()(swift::SILLocation&&) + 75
8  swift-frontend           0x000000010ca199e3 void llvm::function_ref<void (std::__1::optional<swift::Lowering::ManagedValue>)>::callback_fn<(anonymous namespace)::PatternMatchEmission::emitIsDispatch(llvm::ArrayRef<(anonymous namespace)::RowToSpecialize>, swift::Lowering::ConsumableManagedValue, std::__1::function<void (llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, llvm::ArrayRef<(anonymous namespace)::SpecializedRow>, std::__1::function<void (swift::SILLocation)> const&)> const&, std::__1::function<void (swift::SILLocation)> const&)::$_2>(long, std::__1::optional<swift::Lowering::ManagedValue>) + 51
9  swift-frontend           0x000000010c977947 (anonymous namespace)::CheckedCastEmitter::emitConditional(swift::Lowering::ManagedValue, swift::CastConsumptionKind, swift::Lowering::SGFContext, llvm::function_ref<void (swift::Lowering::ManagedValue)>, llvm::function_ref<void (std::__1::optional<swift::Lowering::ManagedValue>)>, swift::ProfileCounter, swift::ProfileCounter) + 2599
10 swift-frontend           0x000000010ca17152 (anonymous namespace)::PatternMatchEmission::emitSpecializedDispatch((anonymous namespace)::ClauseMatrix&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, unsigned int&, unsigned int, std::__1::function<void (swift::SILLocation)> const&) + 20610
11 swift-frontend           0x000000010ca0f1c6 (anonymous namespace)::PatternMatchEmission::emitDispatch((anonymous namespace)::ClauseMatrix&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, std::__1::function<void (swift::SILLocation)> const&) + 3222
12 swift-frontend           0x000000010ca11787 swift::Lowering::SILGenFunction::emitCatchDispatch(swift::DoCatchStmt*, swift::Lowering::ManagedValue, llvm::ArrayRef<swift::CaseStmt*>, swift::Lowering::JumpDest) + 1527
13 swift-frontend           0x000000010ca5bf15 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 16453
14 swift-frontend           0x000000010ca59d22 swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 7762
15 swift-frontend           0x000000010c9bd016 swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 550
16 swift-frontend           0x000000010c8df2e5 swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) + 8869
17 swift-frontend           0x000000010c8e038d swift::Lowering::SILGenModule::emitOrDelayFunction(swift::SILDeclRef) + 221
18 swift-frontend           0x000000010c8dd030 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 480
19 swift-frontend           0x000000010ca79c52 SILGenExtension::visitFuncDecl(swift::FuncDecl*) + 210
20 swift-frontend           0x000000010ca755a8 SILGenExtension::emitExtension(swift::ExtensionDecl*) + 376
21 swift-frontend           0x000000010c8dcd58 swift::ASTVisitor<swift::Lowering::SILGenModule, void, void, void, void, void, void>::visit(swift::Decl*) + 200
22 swift-frontend           0x000000010c8e4845 swift::ASTLoweringRequest::evaluate(swift::Evaluator&, swift::ASTLoweringDescriptor) const + 2325
23 swift-frontend           0x000000010ca574a8 swift::SimpleRequest<swift::ASTLoweringRequest, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>> (swift::ASTLoweringDescriptor), (swift::RequestFlags)17>::evaluateRequest(swift::ASTLoweringRequest const&, swift::Evaluator&) + 200
24 swift-frontend           0x000000010c8e9d6c swift::ASTLoweringRequest::OutputType swift::Evaluator::getResultUncached<swift::ASTLoweringRequest, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()>(swift::ASTLoweringRequest const&, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()) + 812
25 swift-frontend           0x000000010bd22307 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 1159
26 swift-frontend           0x000000010bd2682c performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 3036
27 swift-frontend           0x000000010bd24a16 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 4518
28 swift-frontend           0x000000010bc93b09 swift::mainEntry(int, char const**) + 3241
29 dyld                     0x00007ff8198d9530 start + 3056

uname -a
Darwin comp 24.4.0 Darwin Kernel Version 24.4.0: Fri Apr 11 18:28:23 PDT 2025; root:xnu-11417.101.15~117/RELEASE_X86_64 x86_64

swiftc --version
swift-driver version: 1.120.5 Apple Swift version 6.1 (swiftlang-6.1.0.110.21 clang-1700.0.13.3)
Target: x86_64-apple-macosx15.0