The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/js/src/jit-test/tests/parser/bug-888002-3.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,18 @@
     1.4 +// Constant folding doesn't affect strict delete either.
     1.5 +// In particular, it doesn't affect whether |delete x| is a strict error.
     1.6 +
     1.7 +load(libdir + "asserts.js");
     1.8 +
     1.9 +(function (x) {
    1.10 +    "use strict";
    1.11 +
    1.12 +    // These senseless delete-expressions are legal even in strict mode.
    1.13 +    // Per ES5.1 11.4.1 step 2, each one does nothing and returns true.
    1.14 +    assertEq(delete (1 ? x : x), true);
    1.15 +    assertEq(delete (0 || x), true);
    1.16 +    assertEq(delete (1 && x), true);
    1.17 +
    1.18 +    // Plain `delete x` is a SyntaxError though.
    1.19 +    assertThrowsInstanceOf(() => eval('delete x'), SyntaxError);
    1.20 +    assertThrowsInstanceOf(() => Function('"use strict"; delete x'), SyntaxError);
    1.21 +}());