[Webkit-unassigned] [Bug 174560] New: AX: Crash when password field changes to text field

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174560

            Bug ID: 174560
           Summary: AX: Crash when password field changes to text field
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Macintosh
                OS: All
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbates at webkit.org
                CC: webkit-bug-importer at group.apple.com

Created attachment 315592

  --> https://bugs.webkit.org/attachment.cgi?id=315592&action=review

Test case

Perform the following:

1. Open the attached test case.
2. Click the password field to focus it.

Then WebKit will crash in AXObjectCache::textMarkerDataForFirstPositionInTextControl() because we deference nullptr returned by AXObjectCache::getOrCreate().

<rdar://problem/33261681>

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