ladybird/Libraries/LibJS/Tests/async-this-value.js

test("this value in async function", () => {
    function X() {
        this.boog = async () => {
            this.f = await null;
        };
    }
    new X().boog();
});
LibJS: Don't overwrite cached `this` value on async/generator reentry When resuming execution of a suspended function, we must not overwrite any cached `this` value with something from the ExecutionContext. This was causing an empty JS::Value to leak into the VM when resuming an async arrow function, since the "this mode" for such functions is lexical and thus ExecutionContext will have an empty `this`. It became a problem due to the bytecode optimization where we allow ourselves to assume that `this` remains cached after we've executed a ResolveThisBinding in this (or the first) basic block of the executable. Fixes https://github.com/LadybirdBrowser/ladybird/issues/138 2024-06-20 09:51:06 +02:00			`test("this value in async function", () => {`
			`function X() {`
			`this.boog = async () => {`
			`this.f = await null;`
			`};`
			`}`
			`new X().boog();`
			`});`