From 65bd8f3f3c2b25c4b3086c44d241069033555aae Mon Sep 17 00:00:00 2001
From: "igor%mir2.org" <igor%mir2.org>
Date: Wed, 12 Jan 2005 14:21:06 +0000
Subject: [PATCH] Fixing bug 277935: now parser throws syntax error on
 assignments to descendants like x..y = 1

---
 js/rhino/src/org/mozilla/javascript/IRFactory.java | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/js/rhino/src/org/mozilla/javascript/IRFactory.java b/js/rhino/src/org/mozilla/javascript/IRFactory.java
index b378c30c119..b9a52042cec 100644
--- a/js/rhino/src/org/mozilla/javascript/IRFactory.java
+++ b/js/rhino/src/org/mozilla/javascript/IRFactory.java
@@ -1239,6 +1239,7 @@ final class IRFactory
           }
           case Token.GET_REF: {
             Node ref = left.getFirstChild();
+            checkMutableReference(ref);
             return new Node(Token.SET_REF, ref, right);
           }
         }
@@ -1246,6 +1247,14 @@ final class IRFactory
         throw Kit.codeBug();
     }
 
+    private void checkMutableReference(Node n)
+    {
+        int memberTypeFlags = n.getIntProp(Node.MEMBER_TYPE_PROP, 0);
+        if ((memberTypeFlags & Node.DESCENDANTS_FLAG) != 0) {
+            parser.reportError("msg.bad.assign.left");
+        }
+    }
+
     Node createAssignment(int assignType, Node left, Node right)
     {
         left = makeReference(left);
@@ -1297,6 +1306,7 @@ final class IRFactory
           }
           case Token.GET_REF: {
             Node ref = left.getFirstChild();
+            checkMutableReference(ref);
             Node opLeft = new Node(Token.USE_STACK);
             Node op = new Node(assignOp, opLeft, right);
             return new Node(Token.SET_REF_OP, ref, op);