From 369472a6e2103d509049dd2247ff470c753cccb2 Mon Sep 17 00:00:00 2001
From: Alexander Udalov <Alexander.Udalov@jetbrains.com>
Date: Thu, 17 Apr 2014 19:20:19 +0400
Subject: [PATCH] Log.warn when descriptors reach TO_STRING diagnostic renderer

---
 .../jetbrains/jet/lang/diagnostics/rendering/Renderers.java  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/rendering/Renderers.java b/compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/rendering/Renderers.java
index d741dbed6fe..8d015d15142 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/rendering/Renderers.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/rendering/Renderers.java
@@ -57,6 +57,11 @@ public class Renderers {
         @NotNull
         @Override
         public String render(@NotNull Object element) {
+            if (element instanceof DeclarationDescriptor) {
+                LOG.warn("Diagnostic renderer TO_STRING was used to render an instance of DeclarationDescriptor.\n" +
+                         "This is usually a bad idea, because descriptors' toString() includes some debug information, " +
+                         "which should not be seen by the user.\nDescriptor: " + element);
+            }
             return element.toString();
         }