diff --git a/projects/Closure/42/com/google/javascript/jscomp/parsing/IRFactory.java b/projects/Closure/42/com/google/javascript/jscomp/parsing/IRFactory.java
index 1a95aa2..c6b70c5 100644
--- a/projects/Closure/42/com/google/javascript/jscomp/parsing/IRFactory.java
+++ b/projects/Closure/42/com/google/javascript/jscomp/parsing/IRFactory.java
@@ -565,8 +565,15 @@ Node processExpressionStatement(ExpressionStatement statementNode) {
 
     @Override
     Node processForInLoop(ForInLoop loopNode) {
+      if (loopNode.isForEach()) {
+        errorReporter.error(
+            "unsupported language extension: for each",
+            sourceName,
+            loopNode.getLineno(), "", 0);
 
         // Return the bare minimum to put the AST in a valid state.
+        return newNode(Token.EXPR_RESULT, Node.newNumber(0));
+      }
       return newNode(
           Token.FOR,
           transform(loopNode.getIterator()),