1683776 - Assertion failure: mLastContentProcessedEvent <= mLastAPZProcessedEvent, at FocusState.cpp:38

Status: RESOLVED FIXED

(Core :: Panning and Zooming, defect, P3)

Description

[Hiroyuki Ikezoe (:hiro)]

I do quite often see this assertion while I am trying to do something with extension's popup window such as bug 1683612. But I haven't found reliable STRs yet.

Comment 1

[Daniel Holbert [:dholbert]]

I caught it in rr and uploaded a trace to pernosco. I'll post the pernosco link here when I get it.

Comment 2

[Daniel Holbert [:dholbert]]

Pernosco link: https://pernos.co/debug/vvw1wCg80bm-silqlnSeQA/index.html

(this was when testing a Temporary Add-On with just a toolbar button that opens a popup, similar to Hiro in comment 0. I don't recall what had precisely happened when I hit the assertion here, but I was mostly just clicking around to open/dismiss the popup notification.)

Comment 3

[Daniel Holbert [:dholbert]]

In my pernosco session, mLastContentProcessedEvent is 2274 whereas mLastAPZProcessedEvent is 2226 (so, a difference of 48, with the "wrong one" being larger from the perspective of the assertion).

Comment 4

[Botond Ballo [:botond]]

A couple of pointers for working on this:

• We have a few other bugs listed in the "See Also" field which are about this same assertion. Some of these bugs, such as bug 1659439, have steps to reproduce the assertion.
• Bug 1760618 comment 14 has what looks like a potential diagnosis for this bug; at least it should provide a starting point for a place in the code to dig around.

Comment 5

[Alex Jakobi [:ajakobi]]

I can reproduce the issue using the steps described in Bug 1659439 comment 0 with macOS 13.5.2.

Comment 6

[Alex Jakobi [:ajakobi]]

Attachment: Bug 1683776 - Reset focus state when adopting child tab from other window. r?dlrobertson,botond,hiro

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/3c4183506834
Reset focus state when adopting child tab from other window. r=botond

Comment 8

[Norisz Fay [:noriszfay]]

https://hg.mozilla.org/mozilla-central/rev/3c4183506834