Source code

Revision control

Copy as Markdown

Other Tools

// Any copyright is dedicated to the Public Domain.
//-----------------------------------------------------------------------------
var BUGNUMBER = 1199695;
var summary =
"Computed property names must be considered as always effectful even when " +
"the name expression isn't effectful, because calling ToPropertyKey on " +
"some non-effectful expressions has user-modifiable behavior";
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
RegExp.prototype.toString = () => { throw 42; };
assertThrowsValue(function() {
({ [/regex/]: 0 }); // ToPropertyKey(/regex/) throws 42
}, 42);
function Q() {
({ [new.target]: 0 }); // new.target will be Q, ToPropertyKey(Q) throws 17
}
Q.toString = () => { throw 17; };
assertThrowsValue(function() {
new Q;
}, 17);
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("Tests complete");