OS X 10.10.3。在基于 Cocoa 文档的文档应用程序中，什么会导致以下崩溃？仅当窗口保存弹出面板消失时才会发生：
如果出现“文件已存在”警告表：
更新：有时应用程序在简单地关闭弹出窗口时也会崩溃，但在出现警报表时保证。
崩溃堆栈：
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000061890cbbec0
VM Regions Near 0x61890cbbec0:
MALLOC_LARGE 000000011da03000-000000011eca3000 [ 18.6M] rw-/rwx SM=ZER
-->
__TEXT 0000123400000000-00001234004a5000 [ 4756K] r-x/rwx SM=COW /System/Library/Extensions/AppleIntelHD4000GraphicsGLDriver.bundle/Contents/MacOS/AppleIntelHD4000GraphicsGLDriver
Application Specific Information:
objc_msgSend() selector name: isKindOfClass:
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libobjc.A.dylib 0x00007fff899120dd objc_msgSend + 29
1 com.apple.ViewBridge 0x00007fff8cadbe74 -[NSRemoteViewBase viewWillMoveToWindow:] + 367
2 com.apple.AppKit 0x00007fff94ca90de -[NSView _setWindow:] + 257
3 com.apple.CoreFoundation 0x00007fff8fafa705 __53-[__NSArrayM enumerateObjectsWithOptions:usingBlock:]_block_invoke + 133
4 com.apple.CoreFoundation 0x00007fff8faf9e09 -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] + 313
5 com.apple.AppKit 0x00007fff9542d474 __21-[NSView _setWindow:]_block_invoke735 + 169
6 com.apple.AppKit 0x00007fff94ca9c54 -[NSView _setWindow:] + 3191
7 com.apple.AppKit 0x00007fff94cb73d7 -[NSVisualEffectView _setWindow:] + 214
8 com.apple.AppKit 0x00007fff94f12747 -[NSPopoverFrame _setWindow:] + 111
9 com.apple.AppKit 0x00007fff94ef961f -[NSWindow dealloc] + 1201
10 com.apple.AppKit 0x00007fff94f8c9f5 -[_NSPopoverWindow dealloc] + 74
11 com.apple.AppKit 0x00007fff94ca68cc -[NSWindow release] + 193
12 com.apple.CoreFoundation 0x00007fff8faf78ec __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
13 com.apple.CoreFoundation 0x00007fff8fae99f5 __CFRunLoopDoBlocks + 341
14 com.apple.CoreFoundation 0x00007fff8fae91ae __CFRunLoopRun + 910
15 com.apple.CoreFoundation 0x00007fff8fae8bd8 CFRunLoopRunSpecific + 296
16 com.apple.HIToolbox 0x00007fff92b7256f RunCurrentEventLoopInMode + 235
17 com.apple.HIToolbox 0x00007fff92b722ea ReceiveNextEventCommon + 431
18 com.apple.HIToolbox 0x00007fff92b7212b _BlockUntilNextEventMatchingListInModeWithFilter + 71
19 com.apple.AppKit 0x00007fff94d079bb _DPSNextEvent + 978
20 com.apple.AppKit 0x00007fff94d06f68 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
21 com.apple.AppKit 0x00007fff94cfcbf3 -[NSApplication run] + 594
22 com.apple.AppKit 0x00007fff94c79354 NSApplicationMain + 1832