[Webkit-unassigned] [Bug 221786] New: Nullptr crash in DOMSelection::getRangeAt

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221786

            Bug ID: 221786
           Summary: Nullptr crash in DOMSelection::getRangeAt
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Editing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org
                CC: wenson_hsieh at apple.com

We're somehow hitting nullptr crash in DOMSelection::getRangeAt:

0   WebCore                             0x0000000192226334 WebCore::DOMSelection::getRangeAt(unsigned int) + 1332 (DOMSelection.cpp:0)
1   WebCore                             0x0000000192225fa4 WebCore::DOMSelection::getRangeAt(unsigned int) + 420 (DOMSelection.cpp:370)
2   WebCore                             0x0000000190d6d624 WebCore::jsDOMSelectionPrototypeFunction_getRangeAt(JSC::JSGlobalObject*, JSC::CallFrame*) + 288 (JSDOMSelection.cpp:406)
3   ???                                 0x0000000e324fcb84 0 + 60973632388

<rdar://problem/73611927>

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