Thank you. I've checked and this works with Python2 too without problems, so I've updated the patch to incorporate these fixes.

In D21306#467715, @beischer wrote:

I'm on Arch Linux and '/usr/bin/python' is version 3.7.3. I don't know how the python version is determined in scripts run through 'perf script', unfortunately. Could be that they invoke /usr/bin/python (through #!/usr/bin/python?).

How do you test it with python3? The script must be run using perf and here on openSUSE 15.0 that uses python2.

In D5164#98160, @luebking wrote:

In D5164#98159, @lunakl wrote:

No need for anything so hackish. Pending queued signals are discarded if the receiver of the signal gets deleted. But, as I said, one way or another I don't see a valid reason for a delayed signal here.

Afaiu it's not a sender/receiver, but a parameter (the effect window) that gets deleted interim. Otherwise there should have been no problem itfp, yesno? Effects fires, ScriptedEffect receives, does some w/ the window and falls flat bc. the EffectWindow is meanwhile gone.

In D5164#97342, @graesslin wrote:

Given that it might introduce graphical issues (assuming that there was a good reason for the delaying) only in master please.