Async transformation causes this access before super() call

[magic-akari]

Input code

new (class Foo extends class { } {
	constructor() {
		let x = 1;
		(async () => {
			console.log("before super", x);  // (1) Sync phase
			await 1;
			console.log("after super", x);   // (2) Async phase
		})();
		super();
		x = 2;
	}
})();

Esbuild playground

https://esbuild.github.io/try/#dAAwLjI1LjIALS10YXJnZXQ9ZXMyMDE2AG5ldyAoY2xhc3MgRm9vIGV4dGVuZHMgY2xhc3MgeyB9IHsKCWNvbnN0cnVjdG9yKCkgewoJCWxldCB4ID0gMTsKCQkoYXN5bmMgKCkgPT4gewoJCQljb25zb2xlLmxvZygiYmVmb3JlIHN1cGVyIiwgeCk7CgkJCWF3YWl0IDE7CgkJCWNvbnNvbGUubG9nKCJhZnRlciBzdXBlciIsIHgpOwoJCX0pKCk7CgkJc3VwZXIoKTsKCQl4ID0gMjsKCX0KfSkoKTsK

Expected Behavior

The code should output:

before super 1
after super 2

Actual Behavior

Throws a reference error:

Uncaught ReferenceError: Must call super constructor in derived class before accessing 'this' or returning from derived constructor