RenderButton should store its text renderer in a RenderPtr.

[Andreas Kling]

RenderButton should store its text renderer in a RenderPtr.

[Andreas Kling]

Created attachment 220122 [details]
Patch

[Ahmad Saleem]

https://searchfox.org/wubkat/source/Source/WebCore/rendering/RenderButton.cpp#101

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void RenderButton::setText(const String& str)
{
    if (!m_buttonText && str.isEmpty())
        return;

    if (!m_buttonText) {
        auto newButtonText = createRenderer<RenderTextFragment>(document(), str);
        m_buttonText = *newButtonText;
        // FIXME: This mutation should go through the normal RenderTreeBuilder path.
        if (RenderTreeBuilder::current())
            RenderTreeBuilder::current()->attach(*this, WTFMove(newButtonText));
        else
            RenderTreeBuilder(*document().renderView()).attach(*this, WTFMove(newButtonText));
        return;
    }

    if (!str.isEmpty()) {
        m_buttonText->setText(str.impl());
        return;
    }
    if (RenderTreeBuilder::current())
        RenderTreeBuilder::current()->destroy(*m_buttonText);
    else
        RenderTreeBuilder(*document().renderView()).destroy(*m_buttonText);
}

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The obsolete patch was modify this above function.

[zalan]

This has already been dealt with by switching over to WeakPtr<RenderTextFragment>.