From 20f1ddc9da0fcf33523eccd3669b5a5c636a9a12 Mon Sep 17 00:00:00 2001
From: "Natalia.Ukhorskaya" <natalia.ukhorskaya@jetbrains.com>
Date: Tue, 18 Sep 2012 13:16:15 +0400
Subject: [PATCH] EA-36817: add message for assert for clarify cause of
 exception

---
 .../jetbrains/jet/lang/descriptors/ClassDescriptorBase.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/ClassDescriptorBase.java b/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/ClassDescriptorBase.java
index f0f55b92c9a..ac146f295af 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/ClassDescriptorBase.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/ClassDescriptorBase.java
@@ -36,7 +36,9 @@ public abstract class ClassDescriptorBase implements ClassDescriptor {
     @NotNull
     @Override
     public JetScope getMemberScope(List<TypeProjection> typeArguments) {
-        assert typeArguments.size() == getTypeConstructor().getParameters().size();
+        assert typeArguments.size() == getTypeConstructor().getParameters().size() : "Illegal number of type arguments: expected " 
+                                                                                     + getTypeConstructor().getParameters().size() + " but was " + typeArguments.size() 
+                                                                                     + " for " + getTypeConstructor() + " " + getTypeConstructor().getParameters();
         if (typeArguments.isEmpty()) return getScopeForMemberLookup();
 
         List<TypeParameterDescriptor> typeParameters = getTypeConstructor().getParameters();