Characters aren't being drawn sometimes

[jacobmischka]

For reasons I don't fully understand (looks like something related to the error icon created by ale in the gutter on the left), characters aren't being rendered sometimes.

Notice that the line number in the gutter and the => glyphicon don't display in nvim-gtk (bottom), while they both do in gnome-terminal (top):

Technical information (please complete the following information):

• OS: Arch Linux
• Neovim version: NVIM v0.4.4
• Neovim-Gtk build version: master and 0af8952171c5375a4435cf3790e08c3b9ee29e8d (I'm extremely relieved this wasn't caused by my underline changes, ha)

[jacobmischka]

The issue does disappear when I disable ale, so I'm pretty confident that is what's causing it.

[jacobmischka]

This seems to happen whenever that character in the gutter is something more complex than ASCII. For example, if I change the icon from ⚠ to >> then it renders fine:

[pitbuster]

I can confirm that reverting to pango 1.44 solves the problem, as mentioned in #255. I wonder if this is an upstream bug in pango.

[YaLTeR]

I can confirm that reverting to pango 1.44 solves the problem, as mentioned in #255. I wonder if this is an upstream bug in pango.

Looking at other pango bug reports, they generally reply that unless it reproduces in gedit or pango-view it's likely an application issue (e.g. incorrect handling of glyph metrics).