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 46b407f26c)

languages/cpp/cppcodecompletion.cpp

@@ -2050,14 +2050,13 @@ void CppCodeCompletion::needRecoveryPoints() {
 
   if ( this->d->recoveryPoints.isEmpty() ) {
     kdDebug( 9007 ) << "missing recovery-points for file " << m_activeFileName << " they have to be computed now" << endl;
-    m_pSupport->backgroundParser() ->lock ()
-    ;
+    m_pSupport->backgroundParser() ->lock();
 
     std::vector<CppCodeCompletion> vec;
 
-	  TranslationUnitAST * ast = *m_pSupport->backgroundParser() ->translationUnit( m_activeFileName );
+	  ParsedFilePointer pTransUnit = m_pSupport->backgroundParser() ->translationUnit( m_activeFileName );
     m_pSupport->backgroundParser() ->unlock();
-    if ( !ast ) {
+    if ( !pTransUnit ) {
       kdDebug( 9007 ) << "background-parser is missing the translation-unit. The file needs to be reparsed." << endl;
 	    m_pSupport->parseFileAndDependencies( m_activeFileName, true );
 // 	    m_pSupport->mainWindow() ->statusBar() ->message( i18n( "Background-parser is missing the necessary translation-unit. It will be computed, but this completion will fail." ).arg( m_activeFileName ), 2000 );
@@ -2684,7 +2683,10 @@ void CppCodeCompletion::completeText( bool invokedOnDemand /*= false*/ ) {
 
 	///@todo is all this necessary?
   if ( !recoveredDecl.get() && !recoveredTypeSpec.get() ) {
-    TranslationUnitAST * ast = *m_pSupport->backgroundParser() ->translationUnit( m_activeFileName );
+    ParsedFilePointer pTransUnit = m_pSupport->backgroundParser() ->translationUnit(m_activeFileName);
+    if (pTransUnit)
+    {
+      TranslationUnitAST *ast = *pTransUnit;
       if ( AST * node = findNodeAt( ast, line, column ) ) {
         kdDebug( 9007 ) << "------------------- AST FOUND --------------------" << endl;
         kdDebug( 9007 ) << "node-kind = " << nodeTypeToString( node->nodeType() ) << endl;
@@ -2751,6 +2753,7 @@ void CppCodeCompletion::completeText( bool invokedOnDemand /*= false*/ ) {
         }
       }
     }
+  }
 
   if ( !ctx )
     return ;

languages/cpp/cppsupportpart.cpp

@@ -1699,7 +1699,10 @@ void CppSupportPart::slotNeedTextHint( int line, int column, TQString& textHint
 		return ;
 
 	m_backgroundParser->lock();
-	TranslationUnitAST* ast = *m_backgroundParser->translationUnit( m_activeFileName );
+	ParsedFilePointer pTransUnit = m_backgroundParser->translationUnit(m_activeFileName);
+	if (pTransUnit)
+	{
+		TranslationUnitAST* ast = *pTransUnit;
 		AST* node = 0;
 		if ( ast && ( node = findNodeAt( ast, line, column ) ) )
 		{
@@ -1720,6 +1723,7 @@ void CppSupportPart::slotNeedTextHint( int line, int column, TQString& textHint
 					textHint = m_activeEditor->textLine( startLine ).simplifyWhiteSpace();
 			}
 		}
+	}
 	m_backgroundParser->unlock();
 }