Godot reports error that does not exist

[Torguen]

Godot version

v3.4.2.stable.official [45eaa2d]

System information

w10 64

Issue description

With autosave after 1 second option activated
When the code is changed while the editor is running an instance, when it is run again godot reports an error that does not exist.

Watch this video (I use two monitors, in the video you will only see godot).
The first run reports an error.
I change the code.
The next run reports an error that does not exist.

2022-01-04.10-45-55.mp4

Steps to reproduce

See the video

Minimal reproduction project

...

[KoBeWi]

Seems like the script didn't refresh in time and the game ran with part of the text that you deleted.

[Calinou]

Seems like the script didn't refresh in time and the game ran with part of the text that you deleted.

Maybe this is related to #55145?

[Torguen]

This may be related to the autosave option, I have it set to 1 second and it behaves strangely.

It seems that what happened is that the file was saved automatically (option autosave) when "len" was still written and not deleted, so the code was executed and then the file was automatically saved again (saved automatically when execution), but the code that was used for execution had the "len" error.

In other words, the editor confused the "autosave" of the "autosave" option with the save that the editor does when executing ?. this is only an assumption.

[Torguen]

There is definitely a bug with autosave (I have it activated every 3 seconds), many times it autosaves in the middle of writing code, then runs and reports errors that don't exist.
This happens because the autosave was done in the middle of writing a code and when executing the scene (F6) it was executed with the incomplete code, this reports an error that does not exist.

The autosave should not be activated until 1 (for example) second after the last keyboard entry.
If a new pulse occurs in that period, then the timer will be restarted.