diff --git a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/code/cfg/ControlFlowGraph.java b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/code/cfg/ControlFlowGraph.java
index 44c58f04e196..13658580fe4e 100644
--- a/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/code/cfg/ControlFlowGraph.java
+++ b/plugins/java-decompiler/engine/src/org/jetbrains/java/decompiler/code/cfg/ControlFlowGraph.java
@@ -82,6 +82,7 @@ public class ControlFlowGraph implements CodeConstants {
   }
 
   public String toString() {
+    if (blocks == null) return "Empty";
 
     String new_line_separator = DecompilerContext.getNewLineSeparator();