Open Radar

 
Summary:
Using Xcode version 6.3 (6D570), the code below crashes in the iOS simulator when using the iPhone 5 simulator (or other 32-bit simulator) while it seems to work fine with the iPhone 6 simulator.

ViewController.swift:

    let producer: SignalProducer<Int, NoError> = SignalProducer { observer, _ in
      sendNext(observer, 1)
      sendCompleted(observer)
    }
    
    producer |> collect |> start(
      next: { x in println("Next value \(x)") },
      completed: { _ in println("Completed") }
    )

The sample code uses the ReactiveCocoa library, which is included in the attached sample project along with its dependencies (at version https://github.com/ReactiveCocoa/ReactiveCocoa/releases/tag/v3.0-alpha.4)

Steps to Reproduce:
1) Unzip the attached rac-crash-radar.zip and open the included rac-crash-radar.xcodeproject in Xcode

2) Make sure the scheme "rac-crash-radar" is selected, and select iPhone 5 as the simulator device

3) Run the app (cmd+r)

Expected Results:
App runs successfully, and the following is printed in the console (this is what we get when running with the iPhone 6 simulator):

    Next value [1]
    Completed

Actual Results:
App crashes with EXC_BAD_ACCESS. See attached rac-crash-radar.log for full stack trace.

Version:
Xcode version 6.3 (6D570), OS X 10.10.3 (14D131)

Notes:
Here's the related ReactiveCocoa issue: https://github.com/ReactiveCocoa/ReactiveCocoa/issues/1888

Configuration:
iOS (iPhone 5) simulator running on a MacBook Pro (Retina, Mid 2012) with. Crash seems to happen on every run on my machine.

Attachments:
'rac-crash-radar.log' and 'rac-crash-radar.zip' were successfully uploaded.


rac-crash-radar.log:

(lldb) bt
* thread #1: tid = 0xca3ce, 0x02256996 libswiftCore.dylib`_swift_release_dealloc + 6, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x38)
    frame #0: 0x02256996 libswiftCore.dylib`_swift_release_dealloc + 6
    frame #1: 0x001d1c6b ReactiveCocoa`___lldb_unnamed_function261$$ReactiveCocoa + 171
    frame #2: 0x001b6573 ReactiveCocoa`___lldb_unnamed_function17$$ReactiveCocoa + 35
  * frame #3: 0x001b4c00 ReactiveCocoa`static ReactiveCocoa.|> infix <A, B : ReactiveCocoa.ErrorType, C>(signal=<unavailable>, transform=<unavailable>) -> C) -> C + 128 at Signal.swift:133
    frame #4: 0x001b5e14 ReactiveCocoa`ReactiveCocoa.collect <A, B : ReactiveCocoa.ErrorType>(signal=<unavailable>) -> ReactiveCocoa.Signal<Swift.Array<A>, B> + 532 at Signal.swift:220
    frame #5: 0x002113cd ReactiveCocoa`_TFFFV13ReactiveCocoa14SignalProducer4liftU_S_9ErrorType__FGS0_Q_Q0__U_S1___FFGCS_6SignalQd__Qd_0__GS2_Q_Q0__GS0_Q_Q0__U_FTGVSs6SinkOfGOS_5EventQ_Q0___CS_19CompositeDisposable_T_U_FTGS2_Qd__Qd_0__PS_10Disposable__T_(signal=<unavailable>, innerDisposable=<unavailable>, outerDisposable=<unavailable>, transform=<unavailable>, observer=<unavailable>) + 285 at SignalProducer.swift:250
    frame #6: 0x0020f228 ReactiveCocoa`_TPA__TFFFV13ReactiveCocoa14SignalProducer4liftU_S_9ErrorType__FGS0_Q_Q0__U_S1___FFGCS_6SignalQd__Qd_0__GS2_Q_Q0__GS0_Q_Q0__U_FTGVSs6SinkOfGOS_5EventQ_Q0___CS_19CompositeDisposable_T_U_FTGS2_Qd__Qd_0__PS_10Disposable__T_ + 200 at SignalProducer.swift:0
    frame #7: 0x001f3001 ReactiveCocoa`ReactiveCocoa.SignalProducer.startWithSignal <A, B : ReactiveCocoa.ErrorType>(setUp=<unavailable>, self=<unavailable>)((ReactiveCocoa.Signal<A, B>, ReactiveCocoa.Disposable) -> ()) -> () + 465 at SignalProducer.swift:197
    frame #8: 0x00211274 ReactiveCocoa`_TFFV13ReactiveCocoa14SignalProducer4liftU_S_9ErrorType__FGS0_Q_Q0__U_S1___FFGCS_6SignalQd__Qd_0__GS2_Q_Q0__GS0_Q_Q0__U_FTGVSs6SinkOfGOS_5EventQ_Q0___CS_19CompositeDisposable_T_(observer=<unavailable>, outerDisposable=<unavailable>, self=<unavailable>, transform=<unavailable>) + 356 at SignalProducer.swift:251
    frame #9: 0x001f3f9a ReactiveCocoa`_TPA__TFFV13ReactiveCocoa14SignalProducer4liftU_S_9ErrorType__FGS0_Q_Q0__U_S1___FFGCS_6SignalQd__Qd_0__GS2_Q_Q0__GS0_Q_Q0__U_FTGVSs6SinkOfGOS_5EventQ_Q0___CS_19CompositeDisposable_T_ + 234 at SignalProducer.swift:0
    frame #10: 0x001f31c2 ReactiveCocoa`ReactiveCocoa.SignalProducer.startWithSignal <A, B : ReactiveCocoa.ErrorType>(setUp=<unavailable>, self=<unavailable>)((ReactiveCocoa.Signal<A, B>, ReactiveCocoa.Disposable) -> ()) -> () + 914 at SignalProducer.swift:210
    frame #11: 0x001f369c ReactiveCocoa`ReactiveCocoa.SignalProducer.start <A, B : ReactiveCocoa.ErrorType>(sink=<unavailable>, self=<unavailable>)<C : Swift.SinkType>(C) -> ReactiveCocoa.Disposable + 428 at SignalProducer.swift:225
    frame #12: 0x001f3c8d ReactiveCocoa`ReactiveCocoa.SignalProducer.start <A, B : ReactiveCocoa.ErrorType>(next=Some, error=None, completed=Some, interrupted=None, self=<unavailable>)(next : Swift.Optional<(A) -> ()>, error : Swift.Optional<(B) -> ()>, completed : Swift.Optional<() -> ()>, interrupted : Swift.Optional<() -> ()>) -> ReactiveCocoa.Disposable + 461 at SignalProducer.swift:237
    frame #13: 0x002051bf ReactiveCocoa`ReactiveCocoa.start <A, B : ReactiveCocoa.ErrorType>(producer=<unavailable>, next=Some, error=None, completed=Some, interrupted=None) -> ()>, error : Swift.Optional<(B) -> ()>, completed : Swift.Optional<() -> ()>, interrupted : Swift.Optional<() -> ()>))(producer : ReactiveCocoa.SignalProducer<A, B>) -> ReactiveCocoa.Disposable + 335 at SignalProducer.swift:1065
    frame #14: 0x00089f60 rac-crash-radar`partial apply forwarder for ReactiveCocoa.start <A, B : ReactiveCocoa.ErrorType>((next : Swift.Optional<(A) -> ()>, error : Swift.Optional<(B) -> ()>, completed : Swift.Optional<() -> ()>, interrupted : Swift.Optional<() -> ()>))(producer : ReactiveCocoa.SignalProducer<A, B>) -> ReactiveCocoa.Disposable + 304 at ViewController.swift:0
    frame #15: 0x001f4421 ReactiveCocoa`static ReactiveCocoa.|> infix <A, B : ReactiveCocoa.ErrorType, C>(producer=<unavailable>, transform=<unavailable>) -> C) -> C + 129 at SignalProducer.swift:302
    frame #16: 0x00089059 rac-crash-radar`rac_crash_radar.ViewController.viewDidLoad (self=0x79f8bc50)() -> () + 729 at ViewController.swift:22
    frame #17: 0x000892a2 rac-crash-radar`@objc rac_crash_radar.ViewController.viewDidLoad (rac_crash_radar.ViewController)() -> () + 34 at ViewController.swift:0
    frame #18: 0x00e6fda4 UIKit`-[UIViewController loadViewIfRequired] + 771
    frame #19: 0x00e70095 UIKit`-[UIViewController view] + 35
    frame #20: 0x00d61e85 UIKit`-[UIWindow addRootViewControllerViewIfPossible] + 66
    frame #21: 0x00d6234c UIKit`-[UIWindow _setHidden:forced:] + 287
    frame #22: 0x00d62648 UIKit`-[UIWindow _orderFrontWithoutMakingKey] + 49
    frame #23: 0x00d709b6 UIKit`-[UIWindow makeKeyAndVisible] + 80
    frame #24: 0x00d05ed8 UIKit`-[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 3217
    frame #25: 0x00d09422 UIKit`-[UIApplication _runWithMainScene:transitionContext:completion:] + 1639
    frame #26: 0x00d2293e UIKit`__84-[UIApplication _handleApplicationActivationWithScene:transitionContext:completion:]_block_invoke + 59
    frame #27: 0x00d0804a UIKit`-[UIApplication workspaceDidEndTransaction:] + 155
    frame #28: 0x07253c9e FrontBoardServices`__37-[FBSWorkspace clientEndTransaction:]_block_invoke_2 + 71
    frame #29: 0x0725372f FrontBoardServices`__40-[FBSWorkspace _performDelegateCallOut:]_block_invoke + 54
    frame #30: 0x07265d7c FrontBoardServices`__31-[FBSSerialQueue performAsync:]_block_invoke_2 + 30
    frame #31: 0x00409050 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 16
    frame #32: 0x003fe963 CoreFoundation`__CFRunLoopDoBlocks + 195
    frame #33: 0x003fe7bb CoreFoundation`__CFRunLoopRun + 2715
    frame #34: 0x003fda5b CoreFoundation`CFRunLoopRunSpecific + 443
    frame #35: 0x003fd88b CoreFoundation`CFRunLoopRunInMode + 123
    frame #36: 0x00d07a02 UIKit`-[UIApplication _run] + 571
    frame #37: 0x00d0b106 UIKit`UIApplicationMain + 1526
    frame #38: 0x0008f144 rac-crash-radar`main + 180 at AppDelegate.swift:12
    frame #39: 0x025f9ac9 libdyld.dylib`start + 1
(lldb)