Character rendering broken with varying word lengths combined with wrapping about neovim-gtk

[Lyude]

Heh, moments after filing this issue I happened to notice something else: it's not just word wrapping, the problem seems to happen if there's any non-ASCII glyphs being displayed on the same line ("→foo ba foo" by itself exhibits the same issue):

[theHamsta]

Possible duplicate of #254 . I have the same issue since updating to Ubuntu 20.10 and thus to a newer pango version. Would really love having this solved.

[Lyude]

Hm, ironically I had just finished teaching myself rust (I've done plenty of C programming, but rust is new to me!) and was about to start debugging this and come up with a fix, and then I noticed after updating my system today I'm not seeing the issue anymore. It looks like maybe this was a regression with pango or something? Unfortunately I'm not quite sure what updated to fix this, fwiw: I'm now on pango 1.48.0-1.fc33, gtk3 3.24.24-1.fc33.

@theHamsta btw ^

[Lyude]

Ah-nevermind, just managed to reproduce it. Looking to see if I can figure out the fix for this

[theHamsta]

😄 Just recompiled with latest master of pango, and I'm also still seeing this issue.

[Lyude]

Also dear neovim-gtk maintainer - if you can get to this first I'd recommend it, I'm definitely not that familiar with this codebase (and don't have a whole ton of time on my hands) so it might take me a while to figure out the problem here.

I have figured out one thing at least, which is that it was 279bd5256b17ed68d50fbaaf7df60f189de33c96 ("itemize: Work around gtk2 brokenness") in pango that caused this breakage

[theHamsta]

Btw. I am not a maintainer. But your info may be interesting for @daa84