Re: Bisecting display bugs

[Óscar Fuentes]

Clément Pit--Claudel <address@hidden> writes:

> I've written up notes while bisecting a display bug (#23938) on
> master. Since it didn't seem easy to identify the problem
> automatically from Elisp, I used a small `git bisect run' script that
> automatically captured, cropped, and compared screenshots of Emacs
> against a known-good reference. All in all, things worked nicely: git
> bisect took 4 hours to complete, but it didn't require any interaction
> after starting.
>
> I attached my notes.  Is there interest in including them in admin/notes/?

Speaking as someone who painfully bisected Emacs many times (read:
having to visually check good/bad result on each iteration), the part
about comparing the display's image against a good sample is highly
interesting, and not only for hunting display bugs.