[vala] Error when lambda parameter has incompatible direction with the delegate

[Luca Bruno <lucabru src gnome org>]

commit 56a939c3f16d0c9a90fb4f9e332838a234c08415
Author: Luca Bruno <lucabru src gnome org>
Date:   Thu Dec 4 15:23:44 2014 +0100

    Error when lambda parameter has incompatible direction with the delegate
    
    Fixes bug 740894

 vala/valalambdaexpression.vala |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/vala/valalambdaexpression.vala b/vala/valalambdaexpression.vala
index 61482f4..6918710 100644
--- a/vala/valalambdaexpression.vala
+++ b/vala/valalambdaexpression.vala
@@ -183,6 +183,12 @@ public class Vala.LambdaExpression : Expression {
                        }
 
                        Parameter lambda_param = lambda_param_it.get ();
+
+                       if (lambda_param.direction != cb_param.direction) {
+                               error = true;
+                               Report.error (lambda_param.source_reference, "direction of parameter `%s' is 
incompatible with the target delegate".printf (lambda_param.name));
+                       }
+
                        lambda_param.variable_type = cb_param.variable_type.get_actual_type (target_type, 
null, this);
                        method.add_parameter (lambda_param);
                }