Arrow functions fail to properly capture references to super

[ChadKillingsworth]

The following code will infinitely loop and alert "Child foo" in MS Edge. All other browsers seem to handle this correctly.

class Base {
  foo() {
    alert('base foo');
  }
}

class Child extends Base {
  foo() {
    const parent = () => super.foo;
    alert('Child foo');
    parent().call(this);
  }
}

(new Child()).foo();

[rhuanjl]

I had a quick look at the repro for this - seems to relate specifically to immediately returning the property accessed from super.

Case 1:

class Base { foo() { print('base foo'); } }

class Child extends Base {
  foo() {
    const parent = () => super.foo; // note using {return super.foo;} produced same result
    parent().call(this);
  }
}
new Child().foo();

eshost output:

#### JavaScriptCore, SpiderMonkey, V8 --harmony
base foo

#### Chakra, chDev
Error: Out of stack space

Case 2:

class Base { foo() { print('base foo'); } }

class Child extends Base {
  foo() {
    const parent = () => { const bar = super.foo; return bar; }
    parent().call(this);
  }
}

(new Child()).foo();

eshost output

#### Chakra, chDev, JavaScriptCore, SpiderMonkey, V8 --harmony
base foo

[boingoing]

This has been fixed. Closing old issues.