yosin@, could you please look into this change (https://chromium.googlesource.com/chromium/src/+/bd9019df015f63a4264179042fd2a23d2e0ebd3e%5E%21/third_party/WebKit/Source/core/editing/VisiblePosition.cpp) if possible?

Thank you!

Lower to Pri-2, since real world usage of JustifyRight command is low.

ClusterFuzz has detected this issue as fixed in range 406809:407197.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6168770275442688

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_debug_content_shell_drt
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  positionWithAffinity.position().inShadowIncludingDocument(). BR@beforeAnchor/Tex
  blink::VisiblePositionTemplate<>::create
  blink::createVisiblePosition
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_debug_content_shell_drt&range=389884:390111
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_debug_content_shell_drt&range=406809:407197

Minimized Testcase (0.17 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv94KXBh8IlpjDbNJ8Lotxr8y-Q4sn7g8u_-vIfEANsiXvym8nDYIHknXyITHaahg-3MYG6XT3FGhdOQOL323vW93WY4uNC1nu2YVPaJN5RkhpFSjHACJiOqM45HIm68vQvt-_yj-jertM6nXjZ40k9Kh1W2vOA?testcase_id=6168770275442688
Pass. WebKit didn't crash.<ul><br><br><script>
    document.execCommand("SelectAll");
    document.designMode = "on";
    document.execCommand("JustifyRight");
</script>


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ClusterFuzz testcase is verified as fixed, closing issue.

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