Open Radar

 
I am currently migrating a Swift 1.2 project over to Swift 2.0 and have encountered this compiler crash:

‘Command failed due to signal: Abort trap: 6’

`Assertion failed: ((getType()->isEqual(foundInherited->getType()) || foundInherited->getType()->isSuperclassOf(getType(), nullptr)) && "inherited conformance does not match type"), function getInheritedConformance, file /Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-700.0.52.2/src/swift/lib/AST/ProtocolConformance.cpp, line 467.
0  swift                    0x0000000110601bbb llvm::sys::PrintStackTrace(__sFILE*) + 43
1  swift                    0x00000001106022fb SignalHandler(int) + 379
2  libsystem_platform.dylib 0x00007fff8e079f1a _sigtramp + 26
3  swift                    0x000000010edd2186 swift::Type::transform(std::__1::function<swift::Type (swift::Type)> const&) const + 54
4  libsystem_c.dylib        0x00007fff94891b53 abort + 129
5  libsystem_c.dylib        0x00007fff94859c39 basename + 0
6  swift                    0x000000010edba297 swift::ProtocolConformance::getInheritedConformance(swift::ProtocolDecl*) const + 1319
7  swift                    0x000000010edc7f6f swift::Substitution::subst(swift::ModuleDecl*, llvm::ArrayRef<swift::Substitution>, llvm::DenseMap<swift::TypeBase*, swift::Type, llvm::DenseMapInfo<swift::TypeBase*>, llvm::detail::DenseMapPair<swift::TypeBase*, swift::Type> >&, llvm::DenseMap<swift::ArchetypeType*, llvm::ArrayRef<swift::ProtocolConformance*>, llvm::DenseMapInfo<swift::ArchetypeType*>, llvm::detail::DenseMapPair<swift::ArchetypeType*, llvm::ArrayRef<swift::ProtocolConformance*> > >&) const + 1375
8  swift                    0x000000010edc78f8 swift::Substitution::subst(swift::ModuleDecl*, swift::GenericParamList*, llvm::ArrayRef<swift::Substitution>) const + 1512
9  swift                    0x000000010ead094a swift::TypeSubstCloner<swift::GenericCloner>::visitWitnessMethodInst(swift::WitnessMethodInst*) + 90
10 swift                    0x000000010eacc77b swift::SILCloner<swift::GenericCloner>::visitSILBasicBlock(swift::SILBasicBlock*) + 75
11 swift                    0x000000010eacc0ac swift::GenericCloner::populateCloned() + 396
12 swift                    0x000000010eadc102 swift::GenericCloner::cloneFunction(swift::SILFunction*, llvm::DenseMap<swift::TypeBase*, swift::Type, llvm::DenseMapInfo<swift::TypeBase*>, llvm::detail::DenseMapPair<swift::TypeBase*, swift::Type> >&, llvm::DenseMap<swift::TypeBase*, swift::Type, llvm::DenseMapInfo<swift::TypeBase*>, llvm::detail::DenseMapPair<swift::TypeBase*, swift::Type> >&, llvm::StringRef, swift::ApplySite, std::__1::function<void (swift::SILInstruction*, swift::SILInstruction*)>) + 274
13 swift                    0x000000010eadad45 swift::trySpecializeApplyOfGeneric(swift::ApplySite, swift::SILFunction*&, llvm::SmallVectorImpl<std::__1::pair<swift::FullApplySite, swift::FullApplySite> >&) + 2789
14 swift                    0x000000010e8e8633 (anonymous namespace)::SILGenericSpecializerTransform::run() + 707
15 swift                    0x000000010e8c2dfc swift::SILPassManager::runOneIteration() + 2060
16 swift                    0x000000010e8bf985 swift::runSILOptimizationPasses(swift::SILModule&) + 549
17 swift                    0x000000010e5c53a8 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&) + 12680
18 swift                    0x000000010e5c1fc8 frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 2728
19 swift                    0x000000010e5be02f main + 2015
20 libdyld.dylib            0x00007fff8f2735c9 start + 1
….
1.	While running SILModuleTransform "Generic Specialization”.`

I have yet to be able to track down what is causing the compiler to crash here. I will update the issue if I discover more. Full stack trace attached.

Steps to Reproduce:
1. Hard clean 
2. Compiler project

Expected Results:
Either the project compiles or a compilation error is provided

Actual Results:
The compiler exits with `Command failed due to signal: Abort trap: 6`

Version:
Xcode 7.0 beta 5 
OS X 10.10.4

Notes:
Full stack trace attached

Configuration:
This happens on all configurations, against all simulators & device, in XCode 7 beta 5.

Attachments:
'CommandFailedDueToSignal.log' was successfully uploaded.