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HeartSaVioR · Feb 21, 2020 · 7ef04fc · 7ef04fc
1 parent ac886bc
commit 7ef04fc
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/janino/src/main/java/org/codehaus/janino/StackMap.java b/janino/src/main/java/org/codehaus/janino/StackMap.java
@@ -27,6 +27,7 @@
 
 import java.util.Arrays;
 
+import org.codehaus.commons.compiler.InternalCompilerException;
 import org.codehaus.commons.nullanalysis.Nullable;
 import org.codehaus.janino.util.ClassFile.StackMapTableAttribute.VerificationTypeInfo;
 
@@ -89,7 +90,10 @@ class StackMap {
      * @return The top element of the operand stack
      */
     VerificationTypeInfo
-    peekOperand() { return this.operands[this.operands.length - 1]; }
+    peekOperand() {
+        if (this.operands.length == 0) throw new InternalCompilerException("Operand stack underflow");
+        return this.operands[this.operands.length - 1];
+    }
 
     VerificationTypeInfo[]
     operands() { return (VerificationTypeInfo[]) this.operands.clone(); }