23285766: Crash when calling a Swift lambda from within ObjC

[openradar-mirror]

Description

Summary:
We see a crash when calling a Swift lambda from within ObjC. The same code works fine in an isolated example.

Steps to Reproduce:
Run app. Observe crash: (EXC_i386_GPFLT)

(lldb) bt

• thread 22108400: Swift 2.0b4: Allow if let and guard let to assign to self in failable value type initializers #1: tid = 0x46564d, 0x000000010728a80b libobjc.A.dylibobjc_msgSend + 11, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) frame #0: 0x000000010728a80b libobjc.A.dylibobjc_msgSend + 11
  frame 22108400: Swift 2.0b4: Allow if let and guard let to assign to self in failable value type initializers #1: 0x00000001060923a8 PSPDFKit___lldb_unnamed_function1406$$PSPDFKit + 834 frame #2: 0x0000000105da72a3 SwiftLambdaBlock@nonobjc __ObjC.PSPDFAESCryptoDataProvider.init (__ObjC.PSPDFAESCryptoDataProvider.Type)(URL : __ObjC.NSURL, passphraseProvider : () -> Swift.String, salt : Swift.String, rounds : Swift.UInt) -> Swift.Optional<__ObjC.PSPDFAESCryptoDataProvider> + 195 at SwiftTest.swift:0
  frame 22108354: Swift 2.0b4: Curried initializer syntax #3: 0x0000000105da6c5d SwiftLambdaBlock`__ObjC.PSPDFAESCryptoDataProvider.__allocating_init (__ObjC.PSPDFAESCryptoDataProvider.Type)(URL : __ObjC.NSURL, passphraseProvider : () -> Swift.String, salt : Swift.String, rounds : Swift.UInt) -> Swift.Optional<__ObjC.PSPDFAESCryptoDataProvider> + 141 at SwiftTest.swift:0
  • frame 22108127: Apple Music: CarPlay does not show the For You Playlists #4: 0x0000000105da63d9 SwiftLambdaBlockSwiftLambdaBlock.SwiftTest.init (self=0x00007f9d38cc8780)() -> SwiftLambdaBlock.SwiftTest + 1097 at SwiftTest.swift:31 frame #5: 0x0000000105da6761 SwiftLambdaBlock@objc SwiftLambdaBlock.SwiftTest.init (SwiftLambdaBlock.SwiftTest.Type)() -> SwiftLambdaBlock.SwiftTest + 17 at SwiftTest.swift:0
    frame 22108095: Changing account in Music app requires force-quit #6: 0x0000000105da5dfb SwiftLambdaBlock-[AppDelegate application:didFinishLaunchingWithOptions:](self=0x00007f9d38c33f50, _cmd="application:didFinishLaunchingWithOptions:", application=0x00007f9d38c317f0, launchOptions=0x0000000000000000) + 139 at AppDelegate.m:20 frame #7: 0x0000000107c48f24 UIKit-[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 272
    frame 22107434: Providing Generic Generator for protocol intermittently crashes compiler #8: 0x0000000107c4a0ca UIKit-[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 3415 frame #9: 0x0000000107c509c3 UIKit-[UIApplication _runWithMainScene:transitionContext:completion:] + 1750
    frame 22107245: Xcode 7 beta 4 (7A165t) Interface Builder ignores background color set on UITableView #10: 0x0000000107c4dba3 UIKit-[UIApplication workspaceDidEndTransaction:] + 188 frame #11: 0x0000000111402784 FrontBoardServices-[FBSSerialQueue _performNext] + 192
    frame 22106516: watchOS 2 Beta 4: Can’t Import CoreText #12: 0x0000000111402af2 FrontBoardServices-[FBSSerialQueue _performNextFromRunLoopSource] + 45 frame #13: 0x00000001077d1011 CoreFoundationCFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
    frame 22105625: Mac OS X 10.11: Battery status alwasy shows "20:00 Remaining" #14: 0x00000001077c6f3c CoreFoundation__CFRunLoopDoSources0 + 556 frame #15: 0x00000001077c63f3 CoreFoundation__CFRunLoopRun + 867
    frame 22103992: Stack implemented with enum causes Abort trap: 6 #16: 0x00000001077c5e08 CoreFoundationCFRunLoopRunSpecific + 488 frame #17: 0x0000000107c4d4f5 UIKit-[UIApplication _run] + 402
    frame 22103156: News app interface sometimes not visible or incorrect #18: 0x0000000107c5230d UIKitUIApplicationMain + 171 frame #19: 0x0000000105da5f5f SwiftLambdaBlockmain(argc=1, argv=0x00007fff59e5a670) + 111 at main.m:14
    frame 22102128: Face detection accuracy is bad #20: 0x000000010d15392d libdyld.dylib`start + 1
    (lldb)

Expected Results:
Should not crash. Isolated example also doesn’t crash.

Product Version: 9.1
Created: 2015-10-28T01:30:46.993190
Originated: 2015-10-28T00:00:00
Open Radar Link: http://www.openradar.me/23285766