1417548 - stylo: Different CSS error is reported when a declaration block is nested

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, defect, P3)

Description

[Xidorn Quan [:xidorn] UTC+11]

For the following piece of code from ua.css:
> div:-moz-native-anonymous.moz-accessiblecaret.right > #image {
> }
> 
> div:-moz-native-anonymous.moz-accessiblecaret.none {
> }
> 
> @media (min-resolution: 1.5dppx) {
>   div:-moz-native-anonymous.moz-accessiblecaret.normal > #image {
>   }
> }

Stylo reports
> Unknown pseudo-class or pseudo-element ‘-moz-native-anonymous’.  Ruleset ignored due to bad selector.
for the two rules outside @media, but it reports just
> Declaration dropped.
for the rule inside the @media.

This causes browser/base/content/test/static/browser_parsable_css.js to fail because "Declaration dropped." is not in the whitelist, and it shouldn't either.

Comment 1

[Xidorn Quan [:xidorn] UTC+11]

Attachment: Servo PR

Comment 2

[Xidorn Quan [:xidorn] UTC+11]

https://hg.mozilla.org/integration/autoland/rev/f8dfa355526c

Comment 3

[Xidorn Quan [:xidorn] UTC+11]

https://hg.mozilla.org/mozilla-central/rev/f8dfa355526c