Bug 220558

Summary:

[ESNext] super accesses broken on arrow functions defined as class field

Product:

WebKit

Reporter:

Caio Lima <ticaiolima>

Component:

JavaScriptCore

Assignee:

Caio Lima <ticaiolima>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

darin, ews-watchlist, keith_miller, mark.lam, msaboff, saam, tzagallo, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

WebKit Nightly Build

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Patch	none

Description Caio Lima 2021-01-12 12:28:29 PST

The following program is throwing TypeError, but it should run sucessfully:

```
class C {
    func = () => {
        super.prop = "foo";
        return this.prop;
    };
}

let c = new C;
assert(c.func(), "foo");

```

The result we are getting is: `TypeError: undefined is not an object (evaluating 'super.prop = "foo"')`. We are missing proper `super` binding there.

Comment 1 Caio Lima 2021-01-12 12:32:23 PST

Created attachment 417480 [details]
Patch

Comment 2 Caio Lima 2021-01-12 16:02:43 PST

Comment on attachment 417480 [details]
Patch

Thanks for the quick review!

Comment 3 EWS 2021-01-12 16:06:00 PST

Committed r271420: <https://trac.webkit.org/changeset/271420>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 417480 [details].

Comment 4 Radar WebKit Bug Importer 2021-01-12 16:08:18 PST

<rdar://problem/73085036>