1365984 - Assert Failure APZCTreeManager.cpp:1919

Status: RESOLVED FIXED

(Core :: Panning and Zooming, defect)

Description

[Chris H-C :chutten]

Attachment: layer dump and Assertion failure line

STR:

1) Build debug Nightly off of latest m-c (2017-05-18, on Linux x64)
2) Go to about:telemetry, expand "Histograms"
3) Click on the select in the "Histograms" section (it says "parent")

This is when my mouse stops working very well throughout the OS, so I need to alt+tab to my terminal and kill `mach run` which is awaiting gdb to attach.


The assert that's failing is:
1916       AsyncPanZoomController* result = GetTargetApzcForNode(resultNode);
1917       if (!result) {
1918         result = FindRootApzcForLayersId(resultNode->GetLayersId());
1919         MOZ_ASSERT(result);
1920         APZCTM_LOG("Found target %p using root lookup\n", result);
1921       }

Please find the layer dump attached.

Comment 1

[Botond Ballo [:botond]]

(In reply to Chris H-C :chutten from comment #0)
> This is when my mouse stops working very well throughout the OS, so I need
> to alt+tab to my terminal and kill `mach run` which is awaiting gdb to
> attach.

Whoa, that's messed up! It makes it hard to debug this, too, since regaining proper use of your mouse requires killing the program you want to debug...

I'll investigate.

Comment 2

[Botond Ballo [:botond]]

This is actually fixed in the latest m-c tip.

It was regressed by bug 1353060, and fixed by bug 1365660.