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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/200108">200108</a></dd>
<dt>Author</dt> <dd>rniwa@webkit.org</dd>
<dt>Date</dt> <dd>2016-04-26 15:07:27 -0700 (Tue, 26 Apr 2016)</dd>
</dl>

<h3>Log Message</h3>
<pre>ASSERTION FAILED: m_templateInsertionModes.isEmpty() in WebCore::HTMLTreeBuilder::finished
https://bugs.webkit.org/show_bug.cgi?id=143519

Reviewed by Darin Adler.

LayoutTests/imported/w3c:

Rebaselined the tests.

* web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-as-a-descendant-expected.txt:
* web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-descendant-frameset-expected.txt:
* web-platform-tests/html/syntax/parsing/template/additions-to-the-in-frameset-insertion-mode/end-tag-frameset-expected.txt:

Source/WebCore:

The assertion failure was caused by our parser inconsistently following the spec. Fixed it by making our HTML parser
match the latest HTML5 specification. See inline comments below.

Tests: fast/dom/HTMLTemplateElement/parsing-template-with-frameset.html
       html5lib/generated/run-template-data.html
       html5lib/generated/run-template-write.html
       imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-as-a-descendant.html
       imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-descendant-frameset.html
       imported/w3c/web-platform-tests/html/syntax/parsing/template/additions-to-the-in-frameset-insertion-mode/end-tag-frameset.html

* html/parser/HTMLTreeBuilder.cpp:
(WebCore::HTMLTreeBuilder::processStartTagForInBody): When parsing a template element for 'in body' insertion mode,
we process the token using the rules for 'in head' insertion mode, which sets the frameset-ok flag to &quot;not ok&quot;.
In addition, 'in template' insertion mode should not special case a start tag whose tag name is &quot;frame&quot;. Instead,
fallback to using 'in body' insertion mode.
https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody
(WebCore::HTMLTreeBuilder::processStartTag): 'in frameset' insertion mode should not special case a start tag whose
tag name is &quot;template&quot;: https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inframeset
(WebCore::HTMLTreeBuilder::processEndTag): Ditto for an end tag whose name is &quot;template&quot;.
(WebCore::HTMLTreeBuilder::processStartTagForInHead): When parsing a template element in 'in head' inserting mode,
we set the frameset-ok flag to &quot;not ok&quot;: https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inhead

LayoutTests:

Rebaselined the html5lib tests (now passes all the test cases!) and added a regression test for an assertion.

* fast/dom/HTMLTemplateElement/parsing-template-with-frameset-expected.txt: Added.
* fast/dom/HTMLTemplateElement/parsing-template-with-frameset.html: Added.
* html5lib/generated/run-template-data-expected.txt:
* html5lib/generated/run-template-write-expected.txt:</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkLayoutTestshtml5libgeneratedruntemplatedataexpectedtxt">trunk/LayoutTests/html5lib/generated/run-template-data-expected.txt</a></li>
<li><a href="#trunkLayoutTestshtml5libgeneratedruntemplatewriteexpectedtxt">trunk/LayoutTests/html5lib/generated/run-template-write-expected.txt</a></li>
<li><a href="#trunkLayoutTestsimportedw3cChangeLog">trunk/LayoutTests/imported/w3c/ChangeLog</a></li>
<li><a href="#trunkLayoutTestsimportedw3cwebplatformtestshtmlsemanticsscripting1thetemplateelementtemplateelementtemplateasadescendantexpectedtxt">trunk/LayoutTests/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-as-a-descendant-expected.txt</a></li>
<li><a href="#trunkLayoutTestsimportedw3cwebplatformtestshtmlsemanticsscripting1thetemplateelementtemplateelementtemplatedescendantframesetexpectedtxt">trunk/LayoutTests/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-descendant-frameset-expected.txt</a></li>
<li><a href="#trunkLayoutTestsimportedw3cwebplatformtestshtmlsyntaxparsingtemplateadditionstotheinframesetinsertionmodeendtagframesetexpectedtxt">trunk/LayoutTests/imported/w3c/web-platform-tests/html/syntax/parsing/template/additions-to-the-in-frameset-insertion-mode/end-tag-frameset-expected.txt</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorehtmlparserHTMLTreeBuildercpp">trunk/Source/WebCore/html/parser/HTMLTreeBuilder.cpp</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastdomHTMLTemplateElementparsingtemplatewithframesetexpectedtxt">trunk/LayoutTests/fast/dom/HTMLTemplateElement/parsing-template-with-frameset-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastdomHTMLTemplateElementparsingtemplatewithframesethtml">trunk/LayoutTests/fast/dom/HTMLTemplateElement/parsing-template-with-frameset.html</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/LayoutTests/ChangeLog        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2016-04-26  Ryosuke Niwa  &lt;rniwa@webkit.org&gt;
+
+        ASSERTION FAILED: m_templateInsertionModes.isEmpty() in WebCore::HTMLTreeBuilder::finished
+        https://bugs.webkit.org/show_bug.cgi?id=143519
+
+        Reviewed by Darin Adler.
+
+        Rebaselined the html5lib tests (now passes all the test cases!) and added a regression test for an assertion.
+
+        * fast/dom/HTMLTemplateElement/parsing-template-with-frameset-expected.txt: Added.
+        * fast/dom/HTMLTemplateElement/parsing-template-with-frameset.html: Added.
+        * html5lib/generated/run-template-data-expected.txt:
+        * html5lib/generated/run-template-write-expected.txt:
+
</ins><span class="cx"> 2016-04-26  Skachkov Oleksandr  &lt;gskachkov@gmail.com&gt;
</span><span class="cx"> 
</span><span class="cx">         calling super() a second time in a constructor should throw
</span></span></pre></div>
<a id="trunkLayoutTestsfastdomHTMLTemplateElementparsingtemplatewithframesetexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/dom/HTMLTemplateElement/parsing-template-with-frameset-expected.txt (0 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/dom/HTMLTemplateElement/parsing-template-with-frameset-expected.txt                                (rev 0)
+++ trunk/LayoutTests/fast/dom/HTMLTemplateElement/parsing-template-with-frameset-expected.txt        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -0,0 +1 @@
</span><ins>+This tests parsing a template element with a frameset element. WebKit should not hit an assertion.
</ins></span></pre></div>
<a id="trunkLayoutTestsfastdomHTMLTemplateElementparsingtemplatewithframesethtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/dom/HTMLTemplateElement/parsing-template-with-frameset.html (0 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/dom/HTMLTemplateElement/parsing-template-with-frameset.html                                (rev 0)
+++ trunk/LayoutTests/fast/dom/HTMLTemplateElement/parsing-template-with-frameset.html        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -0,0 +1,13 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;ins&gt;&lt;/ins&gt;
+&lt;template&gt;
+    &lt;frameset&gt;&lt;/frameset&gt;
+&lt;/template&gt;
+&lt;script&gt;
+
+if (window.testRunner)
+    testRunner.dumpAsText();
+
+document.write('This tests parsing a template element with a frameset element. WebKit should not hit an assertion.');
+
+&lt;/script&gt;
</ins></span></pre></div>
<a id="trunkLayoutTestshtml5libgeneratedruntemplatedataexpectedtxt"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/html5lib/generated/run-template-data-expected.txt (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/html5lib/generated/run-template-data-expected.txt        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/LayoutTests/html5lib/generated/run-template-data-expected.txt        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -1,76 +1 @@
</span><del>-../resources/template.dat:
-40
-41
-68
-94
-
-Test 40 of 108 in ../resources/template.dat failed. Input:
-&lt;frameset&gt;&lt;template&gt;&lt;frame&gt;&lt;/frame&gt;&lt;/template&gt;&lt;/frameset&gt;
-Got:
-| &lt;html&gt;
-|   &lt;head&gt;
-|   &lt;frameset&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;frame&gt;
-Expected:
-| &lt;html&gt;
-|   &lt;head&gt;
-|   &lt;frameset&gt;
-|     &lt;frame&gt;
-
-Test 41 of 108 in ../resources/template.dat failed. Input:
-&lt;template&gt;&lt;frame&gt;&lt;/frame&gt;&lt;/frameset&gt;&lt;frame&gt;&lt;/frame&gt;&lt;/template&gt;
-Got:
-| &lt;html&gt;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;frame&gt;
-|         &lt;frame&gt;
-|   &lt;body&gt;
-Expected:
-| &lt;html&gt;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|   &lt;body&gt;
-
-Test 68 of 108 in ../resources/template.dat failed. Input:
-&lt;html a=b&gt;&lt;template&gt;&lt;frame&gt;&lt;/frame&gt;&lt;html b=c&gt;&lt;frame&gt;&lt;/frame&gt;&lt;/template&gt;
-Got:
-| &lt;html&gt;
-|   a=&quot;b&quot;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;frame&gt;
-|         &lt;frame&gt;
-|   &lt;body&gt;
-Expected:
-| &lt;html&gt;
-|   a=&quot;b&quot;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|   &lt;body&gt;
-
-Test 94 of 108 in ../resources/template.dat failed. Input:
-&lt;template&gt;&lt;template&gt;&lt;frame&gt;
-Got:
-| &lt;html&gt;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;template&gt;
-|           content
-|             &lt;frame&gt;
-|   &lt;body&gt;
-Expected:
-| &lt;html&gt;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;template&gt;
-|           content
-|   &lt;body&gt;
</del><ins>+../resources/template.dat: PASS
</ins></span></pre></div>
<a id="trunkLayoutTestshtml5libgeneratedruntemplatewriteexpectedtxt"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/html5lib/generated/run-template-write-expected.txt (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/html5lib/generated/run-template-write-expected.txt        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/LayoutTests/html5lib/generated/run-template-write-expected.txt        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -1,76 +1 @@
</span><del>-../resources/template.dat:
-40
-41
-68
-94
-
-Test 40 of 108 in ../resources/template.dat failed. Input:
-&lt;frameset&gt;&lt;template&gt;&lt;frame&gt;&lt;/frame&gt;&lt;/template&gt;&lt;/frameset&gt;
-Got:
-| &lt;html&gt;
-|   &lt;head&gt;
-|   &lt;frameset&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;frame&gt;
-Expected:
-| &lt;html&gt;
-|   &lt;head&gt;
-|   &lt;frameset&gt;
-|     &lt;frame&gt;
-
-Test 41 of 108 in ../resources/template.dat failed. Input:
-&lt;template&gt;&lt;frame&gt;&lt;/frame&gt;&lt;/frameset&gt;&lt;frame&gt;&lt;/frame&gt;&lt;/template&gt;
-Got:
-| &lt;html&gt;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;frame&gt;
-|         &lt;frame&gt;
-|   &lt;body&gt;
-Expected:
-| &lt;html&gt;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|   &lt;body&gt;
-
-Test 68 of 108 in ../resources/template.dat failed. Input:
-&lt;html a=b&gt;&lt;template&gt;&lt;frame&gt;&lt;/frame&gt;&lt;html b=c&gt;&lt;frame&gt;&lt;/frame&gt;&lt;/template&gt;
-Got:
-| &lt;html&gt;
-|   a=&quot;b&quot;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;frame&gt;
-|         &lt;frame&gt;
-|   &lt;body&gt;
-Expected:
-| &lt;html&gt;
-|   a=&quot;b&quot;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|   &lt;body&gt;
-
-Test 94 of 108 in ../resources/template.dat failed. Input:
-&lt;template&gt;&lt;template&gt;&lt;frame&gt;
-Got:
-| &lt;html&gt;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;template&gt;
-|           content
-|             &lt;frame&gt;
-|   &lt;body&gt;
-Expected:
-| &lt;html&gt;
-|   &lt;head&gt;
-|     &lt;template&gt;
-|       content
-|         &lt;template&gt;
-|           content
-|   &lt;body&gt;
</del><ins>+../resources/template.dat: PASS
</ins></span></pre></div>
<a id="trunkLayoutTestsimportedw3cChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/imported/w3c/ChangeLog (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/imported/w3c/ChangeLog        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/LayoutTests/imported/w3c/ChangeLog        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -1,3 +1,16 @@
</span><ins>+2016-04-26  Ryosuke Niwa  &lt;rniwa@webkit.org&gt;
+
+        ASSERTION FAILED: m_templateInsertionModes.isEmpty() in WebCore::HTMLTreeBuilder::finished
+        https://bugs.webkit.org/show_bug.cgi?id=143519
+
+        Reviewed by Darin Adler.
+
+        Rebaselined the tests.
+
+        * web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-as-a-descendant-expected.txt:
+        * web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-descendant-frameset-expected.txt:
+        * web-platform-tests/html/syntax/parsing/template/additions-to-the-in-frameset-insertion-mode/end-tag-frameset-expected.txt:
+
</ins><span class="cx"> 2016-04-25  Ryosuke Niwa  &lt;rniwa@webkit.org&gt;
</span><span class="cx"> 
</span><span class="cx">         Update template element tests
</span></span></pre></div>
<a id="trunkLayoutTestsimportedw3cwebplatformtestshtmlsemanticsscripting1thetemplateelementtemplateelementtemplateasadescendantexpectedtxt"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-as-a-descendant-expected.txt (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-as-a-descendant-expected.txt        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/LayoutTests/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-as-a-descendant-expected.txt        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -1,10 +1,10 @@
</span><span class="cx"> 
</span><span class="cx"> PASS Template element as a descendant of the BODY element. Template element is created by innerHTML 
</span><span class="cx"> PASS Template element as a descendant of the HEAD element. Template element is created by innerHTML 
</span><del>-PASS Template element as a descendant of the FRAMESET element. Template element is created by innerHTML 
</del><ins>+FAIL Template element as a descendant of the FRAMESET element. Template element is created by innerHTML assert_not_equals: Template element should be a descendant of the FRAMESET element got disallowed value null
</ins><span class="cx"> PASS Template element as an indirect descendant of the BODY element. Template element is created by innerHTML 
</span><span class="cx"> PASS Template element as an indirect descendant of the HEAD element. Template element is created by innerHTML 
</span><del>-PASS Template element as an indirect descendant of the FRAMESET element. Template element is created by innerHTML 
</del><ins>+FAIL Template element as an indirect descendant of the FRAMESET element. Template element is created by innerHTML assert_not_equals: Template element should be a descendant of the FRAMESET element got disallowed value null
</ins><span class="cx"> PASS Template element as a descendant of the BODY element. Template element is appended by appendChild() 
</span><span class="cx"> PASS Template element as a descendant of the HEAD element. Template element is appended by appendChild() 
</span><span class="cx"> PASS Template element as a descendant of the FRAMESET element. Template element is  appended by appendChild() 
</span></span></pre></div>
<a id="trunkLayoutTestsimportedw3cwebplatformtestshtmlsemanticsscripting1thetemplateelementtemplateelementtemplatedescendantframesetexpectedtxt"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-descendant-frameset-expected.txt (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-descendant-frameset-expected.txt        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/LayoutTests/imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-descendant-frameset-expected.txt        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -1,7 +1,5 @@
</span><span class="cx"> 
</span><del>-FAIL Template element as a descendant of the frameset element. Test loading from a file assert_equals: Template element should not be a descendant of the frameset element expected null but got Element node &lt;template&gt;
-        &lt;div&gt;Hello, template&lt;/div&gt;
-    &lt;/templ...
-FAIL Template element as a descendant of the frameset element. Test template element is assigned to frameset's innerHTML) assert_equals: Template element should not be a descendant of the frameset element expected null but got Element node &lt;template&gt;some text&lt;/template&gt;
-FAIL Template element as a descendant of the frameset element. Test template element appended to frameset by appendChild() assert_equals: Template element should be a descendant of the frameset element expected 1 but got 2
</del><ins>+PASS Template element as a descendant of the frameset element. Test loading from a file 
+PASS Template element as a descendant of the frameset element. Test template element is assigned to frameset's innerHTML) 
+PASS Template element as a descendant of the frameset element. Test template element appended to frameset by appendChild() 
</ins><span class="cx"> 
</span></span></pre></div>
<a id="trunkLayoutTestsimportedw3cwebplatformtestshtmlsyntaxparsingtemplateadditionstotheinframesetinsertionmodeendtagframesetexpectedtxt"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/imported/w3c/web-platform-tests/html/syntax/parsing/template/additions-to-the-in-frameset-insertion-mode/end-tag-frameset-expected.txt (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/imported/w3c/web-platform-tests/html/syntax/parsing/template/additions-to-the-in-frameset-insertion-mode/end-tag-frameset-expected.txt        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/LayoutTests/imported/w3c/web-platform-tests/html/syntax/parsing/template/additions-to-the-in-frameset-insertion-mode/end-tag-frameset-expected.txt        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -1,3 +1,3 @@
</span><span class="cx"> 
</span><del>-FAIL &lt;template&gt; tag should be ignored in &quot;in frameset&quot; insertion mode assert_equals: Wrong number of frameset children elements expected 0 but got 1
</del><ins>+PASS &lt;template&gt; tag should be ignored in &quot;in frameset&quot; insertion mode 
</ins><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/Source/WebCore/ChangeLog        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -1,3 +1,32 @@
</span><ins>+2016-04-26  Ryosuke Niwa  &lt;rniwa@webkit.org&gt;
+
+        ASSERTION FAILED: m_templateInsertionModes.isEmpty() in WebCore::HTMLTreeBuilder::finished
+        https://bugs.webkit.org/show_bug.cgi?id=143519
+
+        Reviewed by Darin Adler.
+
+        The assertion failure was caused by our parser inconsistently following the spec. Fixed it by making our HTML parser
+        match the latest HTML5 specification. See inline comments below.
+
+        Tests: fast/dom/HTMLTemplateElement/parsing-template-with-frameset.html
+               html5lib/generated/run-template-data.html
+               html5lib/generated/run-template-write.html
+               imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-as-a-descendant.html
+               imported/w3c/web-platform-tests/html/semantics/scripting-1/the-template-element/template-element/template-descendant-frameset.html
+               imported/w3c/web-platform-tests/html/syntax/parsing/template/additions-to-the-in-frameset-insertion-mode/end-tag-frameset.html
+
+        * html/parser/HTMLTreeBuilder.cpp:
+        (WebCore::HTMLTreeBuilder::processStartTagForInBody): When parsing a template element for 'in body' insertion mode,
+        we process the token using the rules for 'in head' insertion mode, which sets the frameset-ok flag to &quot;not ok&quot;.
+        In addition, 'in template' insertion mode should not special case a start tag whose tag name is &quot;frame&quot;. Instead,
+        fallback to using 'in body' insertion mode.
+        https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody
+        (WebCore::HTMLTreeBuilder::processStartTag): 'in frameset' insertion mode should not special case a start tag whose
+        tag name is &quot;template&quot;: https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inframeset
+        (WebCore::HTMLTreeBuilder::processEndTag): Ditto for an end tag whose name is &quot;template&quot;.
+        (WebCore::HTMLTreeBuilder::processStartTagForInHead): When parsing a template element in 'in head' inserting mode,
+        we set the frameset-ok flag to &quot;not ok&quot;: https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inhead
+
</ins><span class="cx"> 2016-04-26  Filip Pizlo  &lt;fpizlo@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         WebCore on Mac ignores the user's preferred region (country) while getting the language
</span></span></pre></div>
<a id="trunkSourceWebCorehtmlparserHTMLTreeBuildercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/html/parser/HTMLTreeBuilder.cpp (200107 => 200108)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/html/parser/HTMLTreeBuilder.cpp        2016-04-26 21:47:20 UTC (rev 200107)
+++ trunk/Source/WebCore/html/parser/HTMLTreeBuilder.cpp        2016-04-26 22:07:27 UTC (rev 200108)
</span><span class="lines">@@ -896,6 +896,7 @@
</span><span class="cx">         return;
</span><span class="cx">     }
</span><span class="cx">     if (token.name() == templateTag) {
</span><ins>+        m_framesetOk = false;
</ins><span class="cx">         processTemplateStartTag(token);
</span><span class="cx">         return;
</span><span class="cx">     }
</span><span class="lines">@@ -1288,10 +1289,6 @@
</span><span class="cx">             processStartTagForInHead(token);
</span><span class="cx">             return;
</span><span class="cx">         }
</span><del>-        if (token.name() == templateTag) {
-            processTemplateStartTag(token);
-            return;
-        }
</del><span class="cx">         parseError(token);
</span><span class="cx">         break;
</span><span class="cx">     case InsertionMode::AfterFrameset:
</span><span class="lines">@@ -1393,9 +1390,7 @@
</span><span class="cx">         }
</span><span class="cx"> 
</span><span class="cx">         InsertionMode insertionMode = InsertionMode::TemplateContents;
</span><del>-        if (token.name() == frameTag)
-            insertionMode = InsertionMode::InFrameset;
-        else if (token.name() == colTag)
</del><ins>+        if (token.name() == colTag)
</ins><span class="cx">             insertionMode = InsertionMode::InColumnGroup;
</span><span class="cx">         else if (isCaptionColOrColgroupTag(token.name()) || isTableBodyContextTag(token.name()))
</span><span class="cx">             insertionMode = InsertionMode::InTable;
</span><span class="lines">@@ -2137,10 +2132,6 @@
</span><span class="cx">                 m_insertionMode = InsertionMode::AfterFrameset;
</span><span class="cx">             return;
</span><span class="cx">         }
</span><del>-        if (token.name() == templateTag) {
-            processTemplateEndTag(token);
-            return;
-        }
</del><span class="cx">         break;
</span><span class="cx">     case InsertionMode::AfterFrameset:
</span><span class="cx">         if (token.name() == htmlTag) {
</span><span class="lines">@@ -2679,6 +2670,7 @@
</span><span class="cx">         return true;
</span><span class="cx">     }
</span><span class="cx">     if (token.name() == templateTag) {
</span><ins>+        m_framesetOk = false;
</ins><span class="cx">         processTemplateStartTag(token);
</span><span class="cx">         return true;
</span><span class="cx">     }
</span></span></pre>
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