don't crash on missing type arguments, fixes bug 464699

2007-08-08  Juerg Billeter  <j@bitron.ch>

	* vala/valasemanticanalyzer.vala: don't crash on missing type arguments,
	  fixes bug 464699

svn path=/trunk/; revision=450

ChangeLog

+2007-08-08  Jürg Billeter  <j@bitron.ch>
+
+	* vala/valasemanticanalyzer.vala: don't crash on missing type arguments,
+	  fixes bug 464699
+
 2007-08-08  Mathias Hasselmann  <mathias.hasselmann@gmx.de>
 
 	* vapi/glib-2.0.vala: fix spelling of OptionFlags.FILENAME

vala/valasemanticanalyzer.vala

@@ -1534,7 +1534,11 @@ public class Vala.SemanticAnalyzer : CodeVisitor {
 			node_reference.error = true;
 			return null;
 		}
-		var actual_type = (TypeReference) instance_type.get_type_arguments ().get (param_index);
+
+		TypeReference actual_type = null;
+		if (param_index < instance_type.get_type_arguments ().size) {
+			actual_type = (TypeReference) instance_type.get_type_arguments ().get (param_index);
+		}
 		if (actual_type == null) {
 			Report.error (node_reference.source_reference, "internal error: no actual argument found for type parameter %s".printf (generic_type.type_parameter.name));
 			node_reference.error = true;
@@ -1906,6 +1910,9 @@ public class Vala.SemanticAnalyzer : CodeVisitor {
 			/* if type resolving didn't succeed, skip this check */
 			return;
 		}
+		if (expr.inner.error) {
+			return;
+		}
 
 		// FIXME: check whether cast is allowed