Fix Swift 6 / Xcode 26 compile crash in HybridBarcodeScannerOutput.sw…

[web-iou]

Summary

Fix Swift 6 / Xcode 26 compile crash in HybridBarcodeScannerOutput.swift.

Changes

• Avoid retain cycle in barcode scanning closure
• Fix MLImage conversion error path
• Improve compatibility with Swift 6 compiler

Tested

• Xcode 26.1.1
• iOS 26.2 device

[vercel]

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[mrousavy]

Thanks for the PR - what is the full stack trace of the crash? Why can't this be reproduced in the CI pipeline here? It builds wiht Xcode 26 as far as I know.

[web-iou]

@node_modules/react-native-vision-camera-barcode-scanner/ios/HybridBarcodeScannerOutput.swift 1. Apple Swift version 6.2.1 (swiftlang-6.2.1.4.8 clang-1700.4.4.1) 2. Compiling with effective version 5.10 3. While evaluating request IRGenRequest(IR Generation for file "/Users/cc/Desktop/yi_city_rn/node_modules/react-native-vision-camera-barcode-scanner/ios/HybridBarcodeScannerOutput.swift") 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 0x000000010b295eb4 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56 1 swift-frontend 0x000000010b293844 llvm::sys::RunSignalHandlers() + 112 2 swift-frontend 0x000000010b2964e0 SignalHandler(int, __siginfo*, void*) + 344 3 libsystem_platform.dylib 0x00000001834df744 _sigtramp + 56 4 swift-frontend 0x00000001053b2cb0 swift::irgen::IRGenModule::getAddrOfLLVMVariable(swift::irgen::LinkEntity, swift::irgen::ConstantInit, swift::irgen::DebugTypeInfo, llvm::Type*) + 136 5 swift-frontend 0x00000001054651b0 swift::irgen::emitLazyTypeMetadata(swift::irgen::IRGenModule&, swift::NominalTypeDecl*) + 104 6 swift-frontend 0x00000001053a2858 swift::irgen::IRGenerator::emitLazyDefinitions() + 644 7 swift-frontend 0x000000010553b178 swift::IRGenRequest::evaluate(swift::Evaluator&, swift::IRGenDescriptor) const + 4528 8 swift-frontend 0x000000010558c050 swift::SimpleRequest<swift::IRGenRequest, swift::GeneratedModule (swift::IRGenDescriptor), (swift::RequestFlags)17>::evaluateRequest(swift::IRGenRequest const&, swift::Evaluator&) + 180 9 swift-frontend 0x0000000105544734 swift::IRGenRequest::OutputType swift::Evaluator::getResultUncached<swift::IRGenRequest, swift::IRGenRequest::OutputType swift::evaluateOrFatal<swift::IRGenRequest>(swift::Evaluator&, swift::IRGenRequest)::'lambda'()>(swift::IRGenRequest const&, swift::IRGenRequest::OutputType swift::evaluateOrFatal<swift::IRGenRequest>(swift::Evaluator&, swift::IRGenRequest)::'lambda'()) + 856 10 swift-frontend 0x000000010553dda8 swift::performIRGeneration(swift::FileUnit*, swift::IRGenOptions const&, swift::TBDGenOptions const&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>>, llvm::StringRef, swift::PrimarySpecificPaths const&, llvm::StringRef, llvm::GlobalVariable**) + 176 11 swift-frontend 0x0000000104ed4be8 generateIR(swift::IRGenOptions const&, swift::TBDGenOptions const&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>>, swift::PrimarySpecificPaths const&, llvm::StringRef, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, llvm::GlobalVariable*&, llvm::ArrayRef<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>) + 156 12 swift-frontend 0x0000000104ed0204 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*) + 2108 13 swift-frontend 0x0000000104ecf204 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 1032 14 swift-frontend 0x0000000104ed2534 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 1764 15 swift-frontend 0x0000000104ed1144 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 3580 16 swift-frontend 0x0000000104e52724 swift::mainEntry(int, char const**) + 5412 17 dyld 0x000000018310dd54 start + 7184

Thanks for the PR - what is the full stack trace of the crash? Why can't this be reproduced in the CI pipeline here? It builds wiht Xcode 26 as far as I know.