818379 - Interface objects should have an own length property even when we're faking the function

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, defect)

Description

[Boris Zbarsky [:bzbarsky]]

This matters for Document, which is the first thing with a real constructor we've had to fake.

Spec says:

Interface objects for interfaces MUST have a property named “length” with
attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: false } whose value is a Number.

For us I believe that means JSPROP_READONLY | JSPROP_PERMANENT.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Attachment: Make sure interface objects have a 'length' property even if they're not real function objects.

Comment 2

[Boris Zbarsky [:bzbarsky]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/53b604b60d25

Comment 3

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/mozilla-central/rev/53b604b60d25