// frame.offset works in async fns. load(libdir + "asserts.js"); var g = newGlobal({ newCompartment: true }); var dbg = new Debugger(g); g.eval(` async function f() { await Promise.resolve(); } `); const ranges = []; let script; let frame; dbg.onEnterFrame = function(f) { if (frame) { assertEq(f, frame); assertEq(f.script, script); } else { frame = f; script = f.script; assertEq(frame instanceof Debugger.Frame, true); assertEq(script instanceof Debugger.Script, true); } const range = [script.getOffsetMetadata(frame.offset).lineNumber, null]; ranges.push(range); f.onPop = () => { range[1] = script.getOffsetMetadata(frame.offset).lineNumber; }; }; (async () => { const promise = g.f(); assertEq(ranges.length, 1); assertEq(ranges[0][0], 2); assertEq(ranges[0][1], 3); assertEq(script.getOffsetMetadata(frame.offset).lineNumber, 3); await promise; assertEq(ranges.length, 2); assertEq(ranges[1][0], 3); assertEq(ranges[1][1], 3); // The frame has finished evaluating, so the callee is no longer accessible. assertThrowsInstanceOf(() => frame.offset, Error); })();