diff --git a/plugins/groovy/src/org/jetbrains/plugins/groovy/formatter/GroovyBlock.java b/plugins/groovy/src/org/jetbrains/plugins/groovy/formatter/GroovyBlock.java
index 32184b90452c..8225b524b6c5 100644
--- a/plugins/groovy/src/org/jetbrains/plugins/groovy/formatter/GroovyBlock.java
+++ b/plugins/groovy/src/org/jetbrains/plugins/groovy/formatter/GroovyBlock.java
@@ -111,6 +111,10 @@ public class GroovyBlock implements Block, GroovyElementTypes, ASTBlock {
       try {
         mySubBlocks = new GroovyBlockGenerator(this).generateSubBlocks();
       }
+      catch (AssertionError e) {
+        final PsiFile file = myNode.getPsi().getContainingFile();
+        LogMessageEx.error(LOG, "Formatting failed for file " + file.getName(), file.getText());
+      }
       catch (RuntimeException e) {
         final PsiFile file = myNode.getPsi().getContainingFile();
         LogMessageEx.error(LOG, "Formatting failed for file " + file.getName(), file.getText());