[Webkit-unassigned] [Bug 160362] New: NULL Reference Error in ElementRuleCollector

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Jul 29 16:02:50 PDT 2016


https://bugs.webkit.org/show_bug.cgi?id=160362

            Bug ID: 160362
           Summary: NULL Reference Error in ElementRuleCollector
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jbedard at apple.com

The ElementRuleCollector class defines m_authorStyle as a reference.  However, in some cases, this reference is instantiated by a pointer from DocumentRuleSets, and this pointer is occasionally NULL.  This is clearly undefined behavior, although surprisingly, many of the tests which exhibit this (canvas/philip/tests/2d.strokeRect.path.html, for example) still pass.

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