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Copied from upstream:
https://hg.mozilla.org/releases/mozilla-esr38/raw-rev/e93aeb25e2a4
# HG changeset patch
# User Andrew McCreight <continuation@gmail.com>
# Date 1455891967 28800
# Node ID e93aeb25e2a44df8d22f5a065b4410620e2c8730
# Parent 221de852fda32714a9e484774ceafafb450ea73c
Bug 1249377 - Hold a strong reference to |root| in nsHTMLDocument::SetBody. r=bz, a=sylvestre
diff --git a/dom/html/nsHTMLDocument.cpp b/dom/html/nsHTMLDocument.cpp
--- a/dom/html/nsHTMLDocument.cpp
+++ b/dom/html/nsHTMLDocument.cpp
@@ -1044,17 +1044,17 @@ nsHTMLDocument::SetBody(nsIDOMHTMLElemen
ErrorResult rv;
SetBody(static_cast<nsGenericHTMLElement*>(newBody.get()), rv);
return rv.ErrorCode();
}
void
nsHTMLDocument::SetBody(nsGenericHTMLElement* newBody, ErrorResult& rv)
{
- Element* root = GetRootElement();
+ nsCOMPtr<Element> root = GetRootElement();
// The body element must be either a body tag or a frameset tag. And we must
// have a html root tag, otherwise GetBody will not return the newly set
// body.
if (!newBody || !(newBody->Tag() == nsGkAtoms::body ||
newBody->Tag() == nsGkAtoms::frameset) ||
!root || !root->IsHTML() ||
root->Tag() != nsGkAtoms::html) {
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