Fix SEGV when hovering on symbols after creating a new project. This resolves issue #40.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 46b407f26cf98c494f646609a37d03be4c41e11a)

1 files changed, 19 insertions, 15 deletions

diff --git a/languages/cpp/cppsupportpart.cpp b/languages/cpp/cppsupportpart.cpp
index 01b34a43..c94539de 100644
--- a/languages/cpp/cppsupportpart.cpp
+++ b/languages/cpp/cppsupportpart.cpp
@@ -1699,25 +1699,29 @@ void CppSupportPart::slotNeedTextHint( int line, int column, TQString& textHint
 		return ;
 
 	m_backgroundParser->lock();
-	TranslationUnitAST* ast = *m_backgroundParser->translationUnit( m_activeFileName );
-	AST* node = 0;
-	if ( ast && ( node = findNodeAt( ast, line, column ) ) )
+	ParsedFilePointer pTransUnit = m_backgroundParser->translationUnit(m_activeFileName);
+	if (pTransUnit)
 	{
+		TranslationUnitAST* ast = *pTransUnit;
+		AST* node = 0;
+		if ( ast && ( node = findNodeAt( ast, line, column ) ) )
+		{
 
-		while ( node && node->nodeType() != NodeType_FunctionDefinition )
-			node = node->parent();
+			while ( node && node->nodeType() != NodeType_FunctionDefinition )
+				node = node->parent();
 
-		if ( node )
-		{
-			int startLine, startColumn;
-			int endLine, endColumn;
-			node->getStartPosition( &startLine, &startColumn );
-			node->getEndPosition( &endLine, &endColumn );
+			if ( node )
+			{
+				int startLine, startColumn;
+				int endLine, endColumn;
+				node->getStartPosition( &startLine, &startColumn );
+				node->getEndPosition( &endLine, &endColumn );
 
-			if ( !node->text().isNull() )
-				textHint = node->text();
-			else
-				textHint = m_activeEditor->textLine( startLine ).simplifyWhiteSpace();
+				if ( !node->text().isNull() )
+					textHint = node->text();
+				else
+					textHint = m_activeEditor->textLine( startLine ).simplifyWhiteSpace();
+			}
 		}
 	}
 	m_backgroundParser->unlock();