[Webkit-unassigned] [Bug 175340] New: AX: crash at WebCore::AccessibilityObject::supportsARIALiveRegion() const + 24

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=175340

            Bug ID: 175340
           Summary: AX: crash at
                    WebCore::AccessibilityObject::supportsARIALiveRegion()
                    const + 24
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: n_wang at apple.com
                CC: n_wang at apple.com, webkit-bug-importer at group.apple.com

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                   0x00007fff6474c628 WebCore::AccessibilityObject::supportsARIALiveRegion() const + 24
1   com.apple.WebCore                   0x00007fff64754210 WebCore::AccessibilityObject::isInsideARIALiveRegion() const + 96
2   com.apple.WebCore                   0x00007fff6573c86c -[WebAccessibilityObjectWrapper additionalAccessibilityAttributeNames] + 636
3   com.apple.WebCore                   0x00007fff6573e395 -[WebAccessibilityObjectWrapper accessibilityAttributeNames] + 6261
4   com.apple.AppKit                    0x00007fff54dd2030 __NSAccessibilityEntryPointAttributeNames_block_invoke.llvm.9569B7B1 + 85
5   com.apple.AppKit                    0x00007fff54dd18bb NSAccessibilityPerformEntryPointObject.llvm.9569B7B1 + 16
6   com.apple.AppKit                    0x00007fff54936d16 NSAccessibilityEntryPointAttributeNames + 87
7   com.apple.AppKit                    0x00007fff54b7ba29 -[NSObject(NSAccessibilityInternal) _accessibilityAttributeNamesClientError:] + 56
8   com.apple.AppKit                    0x00007fff54b804a7 CopyAttributeNames + 169
9   com.apple.HIServices                0x00007fff55a74d39 _AXXMIGCopyAttributeNames + 216
10  com.apple.HIServices                0x00007fff55a7efe3 _XCopyAttributeNames + 362
11  com.apple.HIServices                0x00007fff55a57989 mshMIGPerform + 212
12  com.apple.CoreFoundation            0x00007fff5716c679 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
13  com.apple.CoreFoundation            0x00007fff5716c5c5 __CFRunLoopDoSource1 + 533
14  com.apple.CoreFoundation            0x00007fff571641b0 __CFRunLoopRun + 2848
15  com.apple.CoreFoundation            0x00007fff57163403 CFRunLoopRunSpecific + 483

Related crash:
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib              0x00007fff7ea52fce __pthread_kill + 10
1   libsystem_pthread.dylib             0x00007fff7eb90384 pthread_kill + 333
2   libsystem_c.dylib                   0x00007fff7e9aed56 abort + 127
3   libc++abi.dylib                     0x00007fff7c9a3f8f abort_message + 245
4   libc++abi.dylib                     0x00007fff7c9c0952 __cxa_pure_virtual + 18
5   com.apple.WebCore                   0x00007fff6475712c WebCore::AccessibilityObject::defaultObjectInclusion() const + 92
6   com.apple.WebCore                   0x00007fff6476a496 WebCore::AccessibilitySVGElement::computeAccessibilityIsIgnored() const + 22
7   com.apple.WebCore                   0x00007fff647571ec WebCore::AccessibilityObject::accessibilityIsIgnored() const + 76
8   com.apple.WebCore                   0x00007fff647d6114 WebCore::AXObjectCache::getOrCreate(WebCore::RenderObject*) + 1716
9   com.apple.WebCore                   0x00007fff64764b20 WebCore::AccessibilityRenderObject::addChildren() + 48
10  com.apple.WebCore                   0x00007fff64752892 WebCore::AccessibilityObject::updateChildrenIfNecessary() + 66
11  com.apple.WebCore                   0x00007fff6474d22d WebCore::AccessibilityObject::updateBackingStore() + 77
12  com.apple.WebCore                   0x00007fff6573614d -[WebAccessibilityObjectWrapperBase updateObjectBackingStore] + 61
13  com.apple.WebCore                   0x00007fff657424c7 -[WebAccessibilityObjectWrapper accessibilityAttributeValue:] + 39
14  com.apple.AppKit                    0x00007fff5482300f NSAccessibilityGetObjectForAttributeUsingLegacyAPI + 371
15  com.apple.AppKit                    0x00007fff54dd5d2d ___NSAccessibilityEntryPointValueForAttribute_block_invoke.816.llvm.9569B7B1 + 1674
16  com.apple.AppKit                    0x00007fff54dd18bb NSAccessibilityPerformEntryPointObject.llvm.9569B7B1 + 16
17  com.apple.AppKit                    0x00007fff54dd1a87 _NSAccessibilityEntryPointValueForAttribute.llvm.9569B7B1 + 182
18  com.apple.AppKit                    0x00007fff54b7bd68 -[NSObject(NSAccessibilityInternal) _accessibilityValueForAttribute:clientError:] + 351

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