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      <base href="https://bugs.webkit.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Deadlocks in UIKeyboardTaskQueue from WKContentView(WKInteraction) endSelectionChange."
   href="https://bugs.webkit.org/show_bug.cgi?id=231330">231330</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Deadlocks in UIKeyboardTaskQueue from WKContentView(WKInteraction) endSelectionChange.
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>iPhone / iPad
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>iOS 14
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Major
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Accessibility
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>justincohen@google.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>andresg_22@apple.com, webkit-bug-importer@group.apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Chrome is seeing a growing number of watchdog kills a day with stacks similar to below on iOS 15.0 and 15.1, as iOS 15 continues to be adopted.

Perhaps the fix for <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [iOS] [AX] Keyboard text candidates don't update when changing selection using Switch Control"
   href="show_bug.cgi?id=228051">https://bugs.webkit.org/show_bug.cgi?id=228051</a> <a href="https://trac.webkit.org/changeset/280019/webkit">https://trac.webkit.org/changeset/280019/webkit</a> introduced a deadlock?

0x00000001baaa5550      (libsystem_kernel.dylib + 0x00001550)           __psynch_cvwait
0x00000001daed3994      (libsystem_pthread.dylib + 0x00001994)          _pthread_cond_wait$VARIANT$armv81
0x0000000182c85d2c      (Foundation + 0x00084d2c)               -[NSCondition waitUntilDate:]
0x0000000182c780ec      (Foundation + 0x000770ec)               -[NSConditionLock lockWhenCondition:beforeDate:]
0x0000000183d9997c      (UIKitCore + 0x0057897c)                -[UIKeyboardTaskQueue lockWhenReadyForMainThread]
0x0000000183b73d70      (UIKitCore + 0x00352d70)                -[UIKeyboardTaskQueue waitUntilAllTasksAreFinished]
0x00000001844d02f0      (UIKitCore + 0x00caf2f0)                -[UIKeyboardImpl generateAutofillCandidateByAddingTask:]
0x0000000183e04214      (UIKitCore + 0x005e3214)                -[UIKeyboardImpl selectionDidChange:]
0x000000018f64ecc0      (WebKit + 0x00770cc0)           -[WKContentView(WKInteraction) endSelectionChange]
0x0000000184868f74      (UIKitCore + 0x0000000001047f74)                -[UITextSelectionInteraction tappedToPositionCursorWithGesture:atPoint:granularity:completionHandler:]
0x0000000184868cac      (UIKitCore + 0x0000000001047cac)                -[UITextSelectionInteraction _checkForRepeatedTap:gestureLocationOut:]
0x0000000184869724      (UIKitCore + 0x0000000001048724)                -[UITextSelectionInteraction _handleMultiTapGesture:]
0x0000000183cc04cc      (UIKitCore + 0x0049f4cc)                -[UIApplication sendAction:to:from:forEvent:]
0x00000001842a0674      (UIKitCore + 0x00a7f674)                -[UITextMultiTapRecognizer onStateUpdate:]
0x00000001839ef784      (UIKitCore + 0x001ce784)                -[UIGestureRecognizerTarget _sendActionWithGestureRecognizer:]
0x00000001839b8f64      (UIKitCore + 0x00197f64)                _UIGestureRecognizerSendTargetActions
0x0000000183983a7c      (UIKitCore + 0x00162a7c)                _UIGestureRecognizerSendActions
0x00000001839bb23c      (UIKitCore + 0x0019a23c)                -[UIGestureRecognizer _updateGestureForActiveEvents]
0x0000000183975364      (UIKitCore + 0x00154364)                _UIGestureEnvironmentUpdate
0x00000001839a7f20      (UIKitCore + 0x00186f20)                -[UIGestureEnvironment _updateForEvent:window:]
0x00000001839b477c      (UIKitCore + 0x0019377c)                -[UIWindow sendEvent:]</pre>
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      </p>


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