linuxmint / linuxmint/mint-themes

GTK2 Theme Error: Syntax error in Mint-L-Dark-Aqua causes Steam crash

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CSS
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Description

Steam fails to launch when using the Mint-L-Dark-Aqua theme on Linux Mint 22.3. The crash is caused by a syntax error in the GTK2 resource file.

Error Log:
/usr/share/themes/Mint-L-Dark-Aqua/gtk-2.0/main.rc:1085: error: unexpected identifier 'direction', expected character '}'

Steps to Reproduce:
1)Set system theme to Mint-L-Dark-Aqua.
2)Attempt to launch Steam from terminal or menu.
3)Steam process terminates immediately after initializing logging.

Environment:
OS: Linux Mint 22.3
Desktop Environment: Cinnamon
Theme: Mint-L-Dark-Aqua

Current Workaround:
Launching Steam with a different GTK2 theme bypasses the crash:
GTK2_RC_FILES=/usr/share/themes/Adwaita/gtk-2.0/gtkrc steam

Debug session and context can be found here: https://gemini.google.com/share/92b08a6f9d8d

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with gtk-2.0/main.rc at line 1085 and inspect the syntax reported in the error log. Reproduce using the Mint-L-Dark-Aqua theme and Steam; done means the theme parses without the reported error and Steam launches without requiring the Adwaita workaround.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux
Domain
desktop
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
55/100

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