Open Radar

 
Summary:
The following code (dependent on https://github.com/ReactiveCocoa/ReactiveCocoa) crashes the compiler

import Cocoa
import ReactiveCocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet weak var window: NSWindow!

    func applicationDidFinishLaunching(aNotification: NSNotification) {
        let (signal, sink) = Signal<String, NoError>.pipe()

        signal |> observe(next: { value in println("\(value)") })

        sendNext(sink, "Hello, world");
    }
}


With the following notes

1.	While emitting SIL for 'applicationDidFinishLaunching' at /Users/neilpa/code/RAC1829/RAC1829/AppDelegate.swift:9:5
2.	While emitting reabstraction thunk in SIL function @_TTRXFo_iSS_dT__XFo_oSS_dT__

Steps to Reproduce:
1. Clone the repo at https://github.com/neilpa/RAC1829 which contains the required dependencies
2. Open the included RAC1829.xcodeproj and attempt the build the project to observe the crash.

Expected Results:
The above code compiles successfully and prints "Hello, world" when run

Actual Results:
The above code crashes the compiler with the following truncated stack

0  swift                    0x0000000107301388 llvm::sys::PrintStackTrace(__sFILE*) + 40
1  swift                    0x0000000107301864 SignalHandler(int) + 452
2  libsystem_platform.dylib 0x00007fff8e94bf1a _sigtramp + 26
3  libsystem_platform.dylib 0x000000010941b000 _sigtramp + 2058154240
4  swift                    0x0000000106d9e057 createThunk(swift::Lowering::SILGenFunction&, swift::SILLocation, TranslationKind, swift::Lowering::ManagedValue, swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::AnyFunctionType>, swift::Lowering::TypeLowering const&) + 1159
5  swift                    0x0000000106d9e901 (anonymous namespace)::OrigToSubst::transformFunction(swift::Lowering::ManagedValue, swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::AnyFunctionType>) + 177
6  swift                    0x0000000106d99d7e (anonymous namespace)::Transform::transform(swift::Lowering::ManagedValue, swift::Lowering::AbstractionPattern, swift::CanType, swift::Lowering::SGFContext) + 62
7  swift                    0x0000000106d9a5c8 swift::Lowering::SILGenFunction::emitOrigToSubstValue(swift::SILLocation, swift::Lowering::ManagedValue, swift::Lowering::AbstractionPattern, swift::CanType, swift::Lowering::SGFContext) + 56
8  swift                    0x0000000106d40a5f swift::Lowering::SILGenFunction::emitApply(swift::SILLocation, swift::Lowering::ManagedValue, llvm::ArrayRef<swift::Substitution>, llvm::ArrayRef<swift::Lowering::ManagedValue>, swift::CanTypeWrapper<swift::SILFunctionType>, swift::Lowering::AbstractionPattern, swift::CanType, bool, llvm::Optional<swift::AbstractCC>, swift::Lowering::SGFContext) + 2079
9  swift                    0x0000000106d65668 swift::Lowering::SILGenFunction::emitApplyOfDefaultArgGenerator(swift::SILLocation, swift::ConcreteDeclRef, unsigned int, swift::CanType, swift::Lowering::SGFContext) + 456
10 swift                    0x0000000106d4c8d4 (anonymous namespace)::ArgEmitter::emitShuffle(swift::Expr*, swift::Expr*, llvm::ArrayRef<swift::TupleTypeElt>, swift::ConcreteDeclRef, llvm::ArrayRef<swift::Expr*>, llvm::ArrayRef<int>, swift::Type, swift::Lowering::AbstractionPattern) + 4884
11 swift                    0x0000000106d4b3b3 (anonymous namespace)::ArgEmitter::emitExpanded(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 2387
12 swift                    0x0000000106d49d30 (anonymous namespace)::CallSite::emit(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, (anonymous namespace)::ParamLowering&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::SmallVectorImpl<std::__1::pair<swift::Lowering::LValue, swift::SILLocation> >&) && + 176
13 swift                    0x0000000106d41886 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 1078
...

Version:
Xcode 6.3 Beta 3 (6D543q)

Notes:


Configuration:
Xcode 6.3 Beta 3 on OS X 10.10

Attachments: