[Webkit-unassigned] [Bug 192538] New: [iOS device] Crash when attempting to call -[_WKAttachment info] for an editable image

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=192538

            Bug ID: 192538
           Summary: [iOS device] Crash when attempting to call
                    -[_WKAttachment info] for an editable image
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: wenson_hsieh at apple.com

An excerpt from the crash log, using the MobileAttachments test app:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000d32538f00
VM Region Info: 0xd32538f00 is not in any region.  Bytes after previous region: 45404622593  
      REGION TYPE                      START - END             [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      MALLOC_NANO            0000000280000000-00000002a0000000 [512.0M] rw-/rwx SM=PRV  
--->  
      UNUSED SPACE AT END

Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [4000]
Triggered by Thread:  0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libobjc.A.dylib     objc_retain + 16
1   WebKit              -[WKDrawingView PNGRepresentation] + 76
2   WebKit              WTF::Function<WTF::RetainPtr<NSFileWrapper> ()>::CallableWrapper<WebKit::EditableImageController::associateWithAttachment(unsigned long long, WTF::String const&)::$_3>::call() + 60
3   WebKit              API::Attachment::fileWrapper() const + 80
4   WebKit              -[_WKAttachment info] + 88
5   MobileAttachments   0x104190000 + 59044
6   UIKitCore           -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 684
7   UIKitCore           -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 84
8   UIKitCore           -[UITableView _updateVisibleCellsNow:isRecursive:] + 2308
9   UIKitCore           -[UITableView layoutSubviews] + 144
10  UIKitCore           -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1428
11  libobjc.A.dylib     -[NSObject performSelector:withObject:] + 68
12  QuartzCore          -[CALayer layoutSublayers] + 188
13  QuartzCore          CA::Layer::layout_if_needed(CA::Transaction*) + 336
14  UIKitCore           -[UIView(Hierarchy) layoutBelowIfNeeded] + 560
15  UIKitCore           __86-[UISheetPresentationController setNestedPresentationIndex:withTransitionCoordinator:]_block_invoke_2 + 56
16  UIKitCore           +[UIView(Animation) performWithoutAnimation:] + 112
17  UIKitCore           __86-[UISheetPresentationController setNestedPresentationIndex:withTransitionCoordinator:]_block_invoke + 112
18  UIKitCore           -[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:] + 276
19  UIKitCore           -[_UIViewControllerTransitionContext __runAlongsideAnimations] + 292
20  UIKitCore           __63+[UIView(Animation) _setAlongsideAnimations:toRunByEndOfBlock:]_block_invoke + 36
21  UIKitCore           -[UIViewAnimationState _runAlongsideAnimations] + 48

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