When I get into these situations, I never find myself using our DTS incidents, but that’s what they’re for. If you have any left, it’s always a good option to look into.
Jeff Kelley slauncha...@gmail.com | @SlaunchaMan <https://twitter.com/SlaunchaMan> | jeffkelley.org <http://jeffkelley.org/> > On Oct 24, 2016, at 5:25 PM, Evan Maloney via swift-users > <swift-users@swift.org> wrote: > > I'm a bit depressed to report that our codebase still crashes the Swift > compiler in the version of Xcode released today. And since we're not using > ObjC generics, the issue isn't related to the radar below. > > Do I have any other option other than (1) spending who knows how long > attempting to rewrite our codebase of hundreds of files until the Swift > compiler hopefully doesn't crash, or (2) waiting who knows how long for > another version of Xcode that may still crash anyway (like this one)? > > It is very frustrating that Apple is encouraging developers to adopt the > latest version of Swift, and when we spend considerable time and effort > updating, only to end up completely dead in the water after doing so. We're > an online retailer hoping to update our app for the holiday season, and all > the Swift 3 work that we've done since August is basically a waste. At this > point, I don't know how we ship in time, since I am familiar enough with > Apple's Xcode release cadence to assume that there will not be another Xcode > release that fixes this problem before mid-November, which is when we'd need > to submit our app to have it ready in time. > > I should note that we've hit some variation of this problem with virtually > every major Xcode beta cycle since Swift 2.0, where our code crashes the > Swift compiler. I've always diligently filed radars, and the problems have > gotten fixed. (Joe, you may recall that you even helped me with this exact > sort of problem at WWDC this year.) But every time it happens, it's a > nerve-wracking experience because I just have to wait and hope that Apple > fixes it before our submission deadline. In the past, we've gotten lucky, and > Apple has fixed the problem in time. > > I guess we finally got unlucky this time. > > I have to say, I've dealt with many different platforms and compilers over > the years, from MPW to CodeWarrior, to Microsoft Visual C++, to various Java > IDEs, and I've never coded on a platform where the compiler crashes so > regularly. I'm beginning to wonder whether my enthusiasm about Swift is > misplaced. I was never beholden to Apple's bugfix schedule when shipping > Objective-C apps. > > Are we just having really bad luck with the Swift compiler, or is this > happening to other people as well? > > > >> On Oct 21, 2016, at 5:29 PM, Joe Groff <jgr...@apple.com >> <mailto:jgr...@apple.com>> wrote: >> >> We discovered a problem recently where we would miscompile when imported >> ObjC lightweight generic classes are extended to conform to Swift protocols. >> This is being tracked by Apple as rdar://problem/28873860 >> <rdar://problem/28873860>, for reference, and should be release noted in >> upcoming Xcode seeds. If you happen to be extending any ObjC generic classes >> to conform to Swift protocols, there are a couple of workarounds that may >> work: >> >> - making the protocol @objc, if possible, or >> - wrapping the ObjC class reference in a generic struct, and making that >> struct conform to the protocol instead of the class. >> >> Does that help at all? >> >> -Joe >> >>> On Oct 21, 2016, at 9:44 AM, Evan Maloney via swift-users >>> <swift-users@swift.org <mailto:swift-users@swift.org>> wrote: >>> >>> This is definitely not my first time hitting Swift compiler crashes :) >>> >>> In the past, the stack traces have been helpful, pointing to what code the >>> compiler was working on when it crashed. Unfortunately, this latest crash >>> doesn't fall into that category: >>> >>> CompileSwift normal x86_64 >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Sources/iOS/FormBuilder/Row.swift >>> cd /Users/emaloney/Documents/Code/CleanroomProject/AppleTart >>> >>> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift >>> -frontend -c -filelist >>> /var/folders/gn/gt76_ktx7w1010xg4v68p3txynz8ws/T/sources-a27d97 >>> -primary-file >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Sources/iOS/FormBuilder/Row.swift >>> -target x86_64-apple-ios9.0 -enable-objc-interop -sdk >>> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.0.sdk >>> -I >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Products/Debug-iphonesimulator >>> -F >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Products/Debug-iphonesimulator >>> -F >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Carthage/Checkouts/AppleApiDocClients/build/Debug >>> -F >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Carthage/Checkouts/AppleTapstreamClient/build/Debug >>> -F >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Carthage/Checkouts/PromiseKit/build/Debug >>> -enable-testing -g -import-objc-header >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/BuildControl/Bridging-Header.h >>> -module-cache-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/ModuleCache -D DEBUG >>> -serialize-debugging-options -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/swift-overrides.hmap >>> -Xcc -iquote -Xcc >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/AppleTart-generated-files.hmap >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/AppleTart-own-target-headers.hmap >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/AppleTart-all-non-framework-target-headers.hmap >>> -Xcc -ivfsoverlay -Xcc >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/all-product-headers.yaml >>> -Xcc -iquote -Xcc >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/AppleTart-project-headers.hmap >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Products/Debug-iphonesimulator/include >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Products/Debug-iphonesimulator/CardIO.framework/Headers >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/DerivedSources/x86_64 >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/DerivedSources >>> -Xcc -DDEBUG=1 -Xcc >>> -working-directory/Users/emaloney/Documents/Code/CleanroomProject/AppleTart >>> -emit-module-doc-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row~partial.swiftdoc >>> -Onone -module-name AppleTart -emit-module-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row~partial.swiftmodule >>> -serialize-diagnostics-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row.dia >>> -emit-dependencies-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row.d >>> -emit-reference-dependencies-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row.swiftdeps >>> -o >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row.o >>> >>> 0 swift 0x000000010e668b6d >>> PrintStackTraceSignalHandler(void*) + 45 >>> 1 swift 0x000000010e6685b6 SignalHandler(int) + 470 >>> 2 libsystem_platform.dylib 0x00007fff94a7b52a _sigtramp + 26 >>> 3 libsystem_platform.dylib 0x0000000000000004 _sigtramp + 1800948468 >>> 4 swift 0x000000010baa58d2 llvm::Value* >>> llvm::function_ref<llvm::Value* (unsigned >>> int)>::callback_fn<swift::irgen::emitArchetypeWitnessTableRef(swift::irgen::IRGenFunction&, >>> swift::CanTypeWrapper<swift::ArchetypeType>, >>> swift::ProtocolDecl*)::$_0>(long, unsigned int) + 530 >>> 5 swift 0x000000010bb83600 >>> swift::irgen::emitImpliedWitnessTableRef(swift::irgen::IRGenFunction&, >>> llvm::ArrayRef<swift::irgen::ProtocolEntry>, swift::ProtocolDecl*, >>> llvm::function_ref<llvm::Value* (unsigned int)> const&) + 240 >>> 6 swift 0x000000010baa56a7 >>> swift::irgen::emitArchetypeWitnessTableRef(swift::irgen::IRGenFunction&, >>> swift::CanTypeWrapper<swift::ArchetypeType>, swift::ProtocolDecl*) + 247 >>> 7 swift 0x000000010bb7f9cd >>> swift::SILWitnessVisitor<(anonymous >>> namespace)::WitnessTableBuilder>::visitProtocolDecl(swift::ProtocolDecl*) + >>> 5997 >>> 8 swift 0x000000010bb7d4d7 >>> swift::irgen::IRGenModule::emitSILWitnessTable(swift::SILWitnessTable*) + >>> 503 >>> 9 swift 0x000000010baef8ed >>> swift::irgen::IRGenerator::emitGlobalTopLevel() + 2077 >>> 10 swift 0x000000010bbb0fcb >>> performIRGeneration(swift::IRGenOptions&, swift::ModuleDecl*, >>> swift::SILModule*, llvm::StringRef, llvm::LLVMContext&, swift::SourceFile*, >>> unsigned int) + 1259 >>> 11 swift 0x000000010ba7f1c7 >>> performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, >>> llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*) + 23687 >>> 12 swift 0x000000010ba77265 >>> swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, >>> swift::FrontendObserver*) + 17029 >>> 13 swift 0x000000010ba3482d main + 8685 >>> 14 libdyld.dylib 0x00007fff8ab5c5ad start + 1 >>> Stack dump: >>> 0. Program arguments: >>> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift >>> -frontend -c -filelist >>> /var/folders/gn/gt76_ktx7w1010xg4v68p3txynz8ws/T/sources-a27d97 >>> -primary-file >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Sources/iOS/FormBuilder/Row.swift >>> -target x86_64-apple-ios9.0 -enable-objc-interop -sdk >>> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.0.sdk >>> -I >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Products/Debug-iphonesimulator >>> -F >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Products/Debug-iphonesimulator >>> -F >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Carthage/Checkouts/AppleApiDocClients/build/Debug >>> -F >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Carthage/Checkouts/AppleTapstreamClient/build/Debug >>> -F >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/Carthage/Checkouts/PromiseKit/build/Debug >>> -enable-testing -g -import-objc-header >>> /Users/emaloney/Documents/Code/CleanroomProject/AppleTart/BuildControl/Bridging-Header.h >>> -module-cache-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/ModuleCache -D DEBUG >>> -serialize-debugging-options -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/swift-overrides.hmap >>> -Xcc -iquote -Xcc >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/AppleTart-generated-files.hmap >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/AppleTart-own-target-headers.hmap >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/AppleTart-all-non-framework-target-headers.hmap >>> -Xcc -ivfsoverlay -Xcc >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/all-product-headers.yaml >>> -Xcc -iquote -Xcc >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/AppleTart-project-headers.hmap >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Products/Debug-iphonesimulator/include >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Products/Debug-iphonesimulator/CardIO.framework/Headers >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/DerivedSources/x86_64 >>> -Xcc >>> -I/Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/DerivedSources >>> -Xcc -DDEBUG=1 -Xcc >>> -working-directory/Users/emaloney/Documents/Code/CleanroomProject/AppleTart >>> -emit-module-doc-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row~partial.swiftdoc >>> -Onone -module-name AppleTart -emit-module-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row~partial.swiftmodule >>> -serialize-diagnostics-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row.dia >>> -emit-dependencies-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row.d >>> -emit-reference-dependencies-path >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row.swiftdeps >>> -o >>> /Users/emaloney/Library/Developer/Xcode/DerivedData/AppleTart-gydtadecugkemlbxcybcwsxuynku/Build/Intermediates/AppleTart.build/Debug-iphonesimulator/AppleTart-iOS.build/Objects-normal/x86_64/Row.o >>> >>> >>> >>> >>> >>>> On Oct 21, 2016, at 12:41 PM, Jon Shier <j...@jonshier.com >>>> <mailto:j...@jonshier.com>> wrote: >>>> >>>> With Swift 3 I’ve found these crashes to be indicative of an underlying >>>> source issue rather than something random in the compiler. When you get >>>> the crash, can you get the backtrace in the Xcode build log? Sometimes >>>> that has clues about what it was doing when it crashed. A lot of the time >>>> when the crash is during the parsing or SIL generation for one of your >>>> functions, it will note it and you can take a look, as there may be a type >>>> mismatch. >>>> >>>> >>>> >>>> Jon >>>> >>>>> On Oct 21, 2016, at 12:26 PM, Evan Maloney via swift-users >>>>> <swift-users@swift.org <mailto:swift-users@swift.org>> wrote: >>>>> >>>>> After a gargantuan effort updating our entire codebase to Swift 3.0, we >>>>> are now being greeted with "Segmentation fault: 11" compiler crash >>>>> whenever attempting to build. >>>>> >>>>> The issue seems to be related to generics, and sounds similar to this >>>>> issue: >>>>> >>>>> >>>>> http://stackoverflow.com/questions/39426535/segmentation-fault-11-xcode-8-swift-3-after-using-notificationcenter/39426812 >>>>> >>>>> <http://stackoverflow.com/questions/39426535/segmentation-fault-11-xcode-8-swift-3-after-using-notificationcenter/39426812> >>>>> >>>>> I've filed a bug report that includes our project codebase, which >>>>> triggers the issue 100% of the time: >>>>> >>>>> rdar://problem/28890409 <rdar://problem/28890409> >>>>> >>>>> The usual work-around of turning off Whole Module Optimization (which has >>>>> gotten around a lot of compiler crashes in the past) does not work here. >>>>> >>>>> Unfortunately, this code is in such a tangle of generics that undoing it >>>>> is not going to be simple. Until a new version of Xcode ships, we're >>>>> pretty much blocked from using Swift 3.0 unless another work-around is >>>>> possible. >>>>> _______________________________________________ >>>>> swift-users mailing list >>>>> swift-users@swift.org <mailto:swift-users@swift.org> >>>>> https://lists.swift.org/mailman/listinfo/swift-users >>>> >>> >>> _______________________________________________ >>> swift-users mailing list >>> swift-users@swift.org <mailto:swift-users@swift.org> >>> https://lists.swift.org/mailman/listinfo/swift-users >>> <https://lists.swift.org/mailman/listinfo/swift-users> >> > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users
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