568844 - Error pages don't show until initial paint delay expires

Status: NEW

(Core :: Layout, defect)

Description

[Boris Zbarsky [:bzbarsky]]

STEPS TO REPRODUCE:
1)  Set the "nglayout.initialpaint.delay" to 20000
2)  Load https://mozilla.org

EXPECTED RESULTS: Error page shows up

ACTUAL RESULTS:  Blank tab for 20 seconds, then error page shows up.

I haven't checked whether this is true for content XUL in general, or just error pages.

Comment 1

[Timothy Nikkel (:tnikkel)]

It happens because DocumentViewerImpl::LoadComplete never gets called for error pages, so the UnsuppressPainting call contained therein never happens so we have to wait for the paint suppression timer to fire.

Comment 2

[Boris Zbarsky [:bzbarsky]]

Ah, I was wondering whether we triggered paint unsuppression off the same codepath as onload.  OK.

We should really fix error pages to not suck that way somehow....