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load(libdir + "asserts.js");
var g = newGlobal({ newCompartment: true });
var dbg = new Debugger();
dbg.addDebuggee(g);
const seen = {};
g.eval(
"" +
function unaliased() {
using x = { [Symbol.dispose]() {} };
assertEq(typeof x, "object");
}
);
g.eval(
"" +
function aliased() {
using x = { [Symbol.dispose]() {} };
assertEq(typeof x, "object");
return () => x;
}
);
dbg.onEnterFrame = frame => {
frame.onStep = () => {
if (typeof frame.environment.getVariable("x") === "object") {
assertThrowsInstanceOf(
() => frame.environment.setVariable("x", 99),
TypeError
);
assertEq(typeof frame.environment.getVariable("x"), "object");
seen[frame.callee.name] = true;
}
};
};
g.unaliased();
g.aliased();
assertEq(Object.keys(seen).length, 2);