diff --git a/platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/InjectedFileViewProvider.java b/platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/InjectedFileViewProvider.java
index 886eb2f81ffe..79d46cefb692 100644
--- a/platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/InjectedFileViewProvider.java
+++ b/platform/lang-impl/src/com/intellij/psi/impl/source/tree/injected/InjectedFileViewProvider.java
@@ -166,4 +166,9 @@ public class InjectedFileViewProvider extends SingleRootFileViewProvider {
       }
     }
   }
+
+  @Override
+  public String toString() {
+    return "Injected file '"+getVirtualFile().getName()+"' " + (isValid() ? "" : " invalid") + (physical ? "" : " nonphysical");
+  }
 }
diff --git a/platform/platform-impl/src/com/intellij/openapi/editor/impl/RedBlackTree.java b/platform/platform-impl/src/com/intellij/openapi/editor/impl/RedBlackTree.java
index a0ced136790a..2e337d355a48 100644
--- a/platform/platform-impl/src/com/intellij/openapi/editor/impl/RedBlackTree.java
+++ b/platform/platform-impl/src/com/intellij/openapi/editor/impl/RedBlackTree.java
@@ -144,7 +144,7 @@ public abstract class RedBlackTree<K> {
 
     Node<K> e = n;
     while (e.getParent() != null) e = e.getParent();
-    assert e == root; // assert the node belongs to our tree
+    assert e == root : e; // assert the node belongs to our tree
 
     if (n.getLeft() != null && n.getRight() != null) {
       // Copy key/value from predecessor and then delete it instead