[Webkit-unassigned] [Bug 151810] New: Reference cycle between SVGElement and SVGPathSegWithContext leaks Document

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=151810

            Bug ID: 151810
           Summary: Reference cycle between SVGElement and
                    SVGPathSegWithContext leaks Document
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: zimmermann at kde.org

The issue is that "RefPtr<SVGPathElement> m_element" in SVGPathSegWithContext is causing reference cycle by using RefPtr to the element.

Specifically, SVGPathElement::m_pathSegList is a SVGPathSegList (subclass of a Vector of RefPtr<SVGPathSeg>), so it strongly references the SVGPathSeg. In practice, I think all SVGPathSeg objects are SVGPathSegWithContext (maybe that subclass should be folded into SVGPathSeg?) SVGPathSegWithContext::m_contextElement strongly references the SVGPathElement, and so we have a reference cycle.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.webkit.org/pipermail/webkit-unassigned/attachments/20151203/5a087e70/attachment-0001.html>