22754268: GKGridGraph of size (1,1) crashes when autoreleased

[openradar-mirror]

Description

Summary:
The following code reliably produces a crash.

Steps to Reproduce:
import GameplayKit

class Broken {
let graph: GKGridGraph

init() {
    graph = GKGridGraph(fromGridStartingAt: [0, 0], width: 1, height: 1, diagonalsAllowed: false)
}

}

var g: Broken?
autoreleasepool {
g = Broken()
}

g = nil

Expected Results:
No crashes or errors.

Actual Results:
Playground execution failed: Execution was interrupted, reason: EXC_BAD_ACCESS (code=EXC_I386_GPFLT).

• thread 22108400: Swift 2.0b4: Allow if let and guard let to assign to self in failable value type initializers #1: tid = 0x4576a, 0x0000000110d3d63f GameplayKit`-[GKGraphNode dealloc] + 31, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT)
  • frame #0: 0x0000000110d3d63f GameplayKit-[GKGraphNode dealloc] + 31 frame #1: 0x00007fff9ffbb2dd CoreFoundation-[**NSArrayM dealloc] + 205
    frame 22108390: Swift 2.0b4: Allow assignment of nil to self in failable initializers to indicate failure #2: 0x00007fff95188b81 libobjc.A.dylibobject_cxxDestructFromClass(objc_object*, objc_class*) + 127 frame #3: 0x00007fff95181383 libobjc.A.dylibobjc_destructInstance + 116
    frame 22108127: Apple Music: CarPlay does not show the For You Playlists #4: 0x00007fff951812e5 libobjc.A.dylibobject_dispose + 22 frame #5: 0x0000000110d389d1 GameplayKit-[GKGraph dealloc] + 65
    frame 22108095: Changing account in Music app requires force-quit #6: 0x0000000110dc84b3 $__lldb_expr36__lldb_expr_36.Broken.deinit(self=0x00007f81a3115c20) + 35 at <EXPR>:0 frame #7: 0x0000000110dc8438 $__lldb_expr36__lldb_expr_36.Broken.__deallocating_deinit + 24 at :0
    frame 22107434: Providing Generic Generator for protocol intermittently crashes compiler #8: 0x0000000110dc82d5 $__lldb_expr36main + 725 at <EXPR>:0 frame #9: 0x000000010bafd710 Gameplay_mh_execute_header + 22288
    frame 22107245: Xcode 7 beta 4 (7A165t) Interface Builder ignores background color set on UITableView #10: 0x000000010bafeb31 Gameplayreabstraction thunk helper from @callee_owned () -> (@unowned ()) to @callee_owned (@in ()) -> (@out ()) + 17 frame #11: 0x000000010bafe881 Gameplaypartial apply forwarder for reabstraction thunk helper from @callee_owned () -> (@unowned ()) to @callee_owned (@in ()) -> (@out ()) + 81
    frame 22106516: watchOS 2 Beta 4: Can’t Import CoreText #12: 0x000000010bafebb0 Gameplayreabstraction thunk helper from @callee_owned (@in ()) -> (@out ()) to @callee_owned () -> (@unowned ()) + 32 frame #13: 0x000000010bafebe7 Gameplayreabstraction thunk helper from @callee_owned () -> (@unowned ()) to @callee_unowned @convention(block) () -> (@unowned ()) + 39
    frame 22105625: Mac OS X 10.11: Battery status alwasy shows "20:00 Remaining" #14: 0x00007fffa003724c CoreFoundation__CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK** + 12 frame #15: 0x00007fffa0016b65 CoreFoundation__CFRunLoopDoBlocks + 341
    frame 22103992: Stack implemented with enum causes Abort trap: 6 #16: 0x00007fffa001632e CoreFoundation__CFRunLoopRun + 910 frame #17: 0x00007fffa0015d38 CoreFoundationCFRunLoopRunSpecific + 296
    frame 22103156: News app interface sometimes not visible or incorrect #18: 0x00007fff98922d55 HIToolboxRunCurrentEventLoopInMode + 235 frame #19: 0x00007fff98922a97 HIToolboxReceiveNextEventCommon + 184
    frame 22102128: Face detection accuracy is bad #20: 0x00007fff989229cf HIToolbox_BlockUntilNextEventMatchingListInModeWithFilter + 71 frame #21: 0x00007fff92642236 AppKit_DPSNextEvent + 1067
    frame 22098492: Xcode-beta (7A165t): UI Tests: secureTextFields are duplicated #22: 0x00007fff92641665 AppKit-[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454 frame #23: 0x00007fff926361c8 AppKit-[NSApplication run] + 682
    frame 22096010: Impossible to inspect the contents of the Core Spotlight index #24: 0x000000010bafd9c8 Gameplaymain + 696 frame #25: 0x00007fff932d75ad libdyld.dylibstart + 1
    frame 22094417: UIPrintInteractionController does not indicate its method of dismissal #26: 0x00007fff932d75ad libdyld.dylib`start + 1

Version:
Xcode 7.1 beta (7B60)

Notes:
When width>1 or height>1, the crash does not occur.

Configuration:
OS X 10.11 (15A279b)

Product Version:
Created: 2015-09-18T07:28:41.208950
Originated: 2015-09-18T00:00:00
Open Radar Link: http://www.openradar.me/22754268