Hello, a few days ago I wanted to try out upgrading to Sublime Text 4. Pretty soon after downloading it, I tried to change the colorscheme with Preferences > Select Color Scheme and my computer started locking up. I found that the same thing happened with Preferences > Select Theme, and that if I watched htop I could see the resident set size increasing by about a gigabyte per second, until it reached 12 Gb and my laptop started swapping.
I am on Arch Linux. I downloaded different versions of the .pkg.tar.xz files on the Downloads page and could reproduce it with any Sublime Text 4 version, but never in ST3.
By creating a new user, I saw that the issue didn’t appear with a clean $HOME.
I used strace() to find out which files were being opened, and copied them to a /tmp/subl directory that I could set my HOME variable to. Then I started removing subdirectories in /tmp/subl until the problem went away. The culprit turned out to be this configuration file:
~/.config/fontconfig/fonts.conf
with the following contents:
<fontconfig>
<alias>
<family>monospace</family>
<prefer>
<family>Fira Mono</family>
<family>Noto Sans Mono</family>
</prefer>
</alias>
<match target="font">
<test name="family" compare="eq">
<string>Fira Mono</string>
</test>
<edit name="pixelsize">
<double>18</double>
</edit>
</match>
</fontconfig>
Hopefully this bug can be fixed? (If my fontconfig file is technically invalid, I’d love to know that too.)