1318646 - Promise.prototype should be an ordinary object

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, defect, P3)

Description

[Tom S [:evilpie]]

Promise.prototype already isn't a Promise instance, but the class name is set to "PromiseProto", we should change that to "Object" so it looks like an ordinary object to JS.

Please fix adjust jit-test/tests/basic/plain-object-prototypes[-error].js accordingly afterwards.

Comment 1

[Tom S [:evilpie]]

We can't really make our prototype objects "plain objects", because that wouldn't work with JSXray and ClassSpec. However this is now basically unboservable since we removed the Object.prototype.toString fallback in bug 1277801. Only in error messages will expose this like the test in bug 1637078, but that seems like a good thing instead of just using "Object".