Two changes, one a refactoring and one that affects V8's JS semantics....

test/mjsunit/invalid-lhs.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Test that we get exceptions for invalid left-hand sides.  Also
-// tests that if the invalid left-hand side is a function call, the
-// exception is delayed until runtime.
+// Test that we get exceptions for invalid left-hand sides.  The
+// exceptions are delayed until runtime.
 
 // Normal assignments:
 assertThrows("12 = 12");
 assertThrows("x++ = 12");
 assertThrows("eval('var x') = 12");
 assertDoesNotThrow("if (false) eval('var x') = 12");
 
 // Pre- and post-fix operations:
 assertThrows("12++");
 assertThrows("12--");
 assertThrows("--12");
 assertThrows("++12");
 assertThrows("++(eval('12'))");
 assertThrows("(eval('12'))++");
 assertDoesNotThrow("if (false) ++(eval('12'))");
 assertDoesNotThrow("if (false) (eval('12'))++");
 
 // For in:
 assertThrows("for (12 in [1]) print(12);");
 assertThrows("for (eval('var x') in [1]) print(12);");
 assertDoesNotThrow("if (false) for (eval('var x') in [1]) print(12);");
 
 // For:
 assertThrows("for (12 = 1;;) print(12);");
 assertThrows("for (eval('var x') = 1;;) print(12);");
 assertDoesNotThrow("if (false) for (eval('var x') = 1;;) print(12);");
 
 // Assignments to 'this'.
 assertThrows("this = 42");
-assertThrows("function f() { this = 12; }");
-assertThrows("for (this in Array) ;");
+assertDoesNotThrow("function f() { this = 12; }");
+assertThrows("for (this in {x:3, y:4, z:5}) ;");
 assertThrows("for (this = 0;;) ;");
 assertThrows("this++");
 assertThrows("++this");
 assertThrows("this--");
 assertThrows("--this");
-
-