[Webkit-unassigned] [Bug 281991] New: REGRESSION (281333 at main) [Cocoa] Correct nullptr crashes in WKAccessibilityRootObject

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=281991

            Bug ID: 281991
           Summary: REGRESSION (281333 at main) [Cocoa] Correct nullptr
                    crashes in WKAccessibilityRootObject
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org

The changes in 281333 at main removed a nullptr check. Our CI system is experiencing numerous crashes here, slowing our test system.

This patch restores the missing nullptr check, and adds a few more in code paths impacted by the changes in 281333 at main.

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