Insert the error message block when stopping parsing and an error occurred

Source/core/xml/parser/XMLDocumentParser.cpp

Index: Source/core/xml/parser/XMLDocumentParser.cpp
diff --git a/Source/core/xml/parser/XMLDocumentParser.cpp b/Source/core/xml/parser/XMLDocumentParser.cpp
index 91b1a131bf96777a588c3b31d6ad116a376824fd..966f25045593e368fdbcd2b574477cb84fef3933 100644
--- a/Source/core/xml/parser/XMLDocumentParser.cpp
+++ b/Source/core/xml/parser/XMLDocumentParser.cpp
@@ -422,7 +422,9 @@ void XMLDocumentParser::end()
     if (m_parserPaused)
         return;
 
-    if (m_sawError) {
+    // stopParsing() calls insertErrorMessageBlock() if there was a parsing
+    // error. Avoid showing the error message block twice.
+    if (m_sawError && !isStopped()) {
         insertErrorMessageBlock();

[Erik Dahlström (inactive), 2015/01/14 13:35:41]

Under which circumstances would the parser be stopped when we reach here?

     } else {
         exitText();
@@ -1532,6 +1534,8 @@ TextPosition XMLDocumentParser::textPosition() const
 
 void XMLDocumentParser::stopParsing()
 {
+    if (!m_parsingFragment && m_sawError && !isStopped())

[Erik Dahlström (inactive), 2015/01/14 13:35:41]

What about (m_parsingFragment && m_sawError && !isStopped())? How is that
handled wrt parsing errors?

+        insertErrorMessageBlock();
     DocumentParser::stopParsing();
     if (context())
         xmlStopParser(context());