=== modified file 'gobject/valaccodegenerator.vala'
--- gobject/valaccodegenerator.vala	2008-05-26 05:00:43 +0000
+++ gobject/valaccodegenerator.vala	2008-05-26 07:19:59 +0000
@@ -1559,7 +1559,7 @@
 			var ccond = new CCodeBinaryExpression (CCodeBinaryOperator.INEQUALITY, new CCodeIdentifier ("inner_error"), new CCodeConstant ("NULL"));
 
 			cfrag.append (new CCodeIfStatement (ccond, cerror_block));
-		} else if (current_method != null && current_method.get_error_types ().size > 0) {
+		} else if (current_method != null && current_method.tree_can_fail) {
 			// current method can fail, propagate error
 			// TODO ensure one of the error domains matches
 
@@ -3511,7 +3511,7 @@
 
 		}
 
-		if (m.get_error_types ().size > 0) {
+		if (m.tree_can_fail) {
 			var cparam = new CCodeFormalParameter ("error", "GError**");
 			cparam_map.set (get_param_pos (-1), cparam);
 		}
@@ -3573,7 +3573,7 @@
 			i++;
 		}
 
-		if (m.get_error_types ().size > 0) {
+		if (m.tree_can_fail) {
 			carg_map.set (get_param_pos (-1), new CCodeIdentifier ("error"));
 		}
 

=== modified file 'gobject/valaccodemethodbinding.vala'
--- gobject/valaccodemethodbinding.vala	2008-05-26 05:00:43 +0000
+++ gobject/valaccodemethodbinding.vala	2008-05-26 07:19:13 +0000
@@ -452,7 +452,7 @@
 				}
 			}
 
-			if (m.get_error_types ().size > 0) {
+			if (m.tree_can_fail) {
 				var cparam = new CCodeFormalParameter ("error", "GError**");
 				cparam_map.set (codegen.get_param_pos (-1), cparam);
 				carg_map.set (codegen.get_param_pos (-1), new CCodeIdentifier (cparam.name));
@@ -635,7 +635,7 @@
 			}
 		}
 
-		if (m.get_error_types ().size > 0) {
+		if (m.tree_can_fail) {
 			var cparam = new CCodeFormalParameter ("error", "GError**");
 			cparam_map.set (codegen.get_param_pos (-1), cparam);
 		}

=== modified file 'gobject/valaccodeobjecttypesymbolbinding.vala'
--- gobject/valaccodeobjecttypesymbolbinding.vala	2008-05-26 05:00:43 +0000
+++ gobject/valaccodeobjecttypesymbolbinding.vala	2008-05-26 07:15:58 +0000
@@ -238,7 +238,7 @@
 			ccall.add_argument (new CCodeIdentifier (param.name));
 		}
 
-		if (m.get_error_types ().size > 0) {
+		if (m.tree_can_fail) {
 			ccall.add_argument (new CCodeIdentifier ("error"));
 		}