Protontricks crashes if two accounts are sharing the same library folder but do not both own all games / game was installed on Windows

[thelabcat]

Describe the bug
Me and a housemate use the same computer. Our Steam accounts are both set to install games on the same non-OS drive. Maybe this in and of itself is problematic, but assuming it isn't I continue. I have also been running a dual-boot setup with Windows, and have that same library shared between OSes. He has Apex Legends in his account, and installed it via Windows. I do not own Apex Legends. After he made this install, when I tried to launch Protontricks, it crashed, and the log shows it was looking for a file related to Apex Legends but didn't find it.

To Reproduce
Steps to reproduce the behavior:

1. Have a dual-boot setup with Windows and Linux.
2. Have a separate storage drive set as a Steam library in both OSes (I mainly used this tutorial to set that up).
3. Have two Steam accounts with different game libraries (although we are in a family share), set to both use that same library.
4. Have one account install a free-to-play on Windows.
5. Attempt to launch Protontricks from the other account on Linux.
6. Crash.

Here is the console log:

protontricks (WARNING): Steam library folder /media/wilbur/SteamLibrary/SteamLibrary not found. Protontricks might not have access to the directory. ## Note added by me to the log: This is in relation to the library having been also used in Ubuntu-based distros. It has appeared before I set up this dual account thing, and Protontricks worked fine.
Traceback (most recent call last):
  File "/home/wilbur/.local/bin/protontricks", line 8, in <module>
    sys.exit(cli())
             ~~~^^
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/cli/main.py", line 32, in cli
    main(args)
    ~~~~^^^^^^
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/cli/util.py", line 175, in wrapper
    return cli_func(self, *args, **kwargs)
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/cli/main.py", line 298, in main
    steam_apps = get_steam_apps(
        steam_root=steam_root, steam_path=steam_path,
        steam_lib_paths=steam_lib_paths
    )
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/steam.py", line 1435, in get_steam_apps
    steam_app = SteamApp.from_appmanifest(
        manifest_path, steam_lib_paths=steam_lib_paths,
        steam_path=steam_path
    )
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/steam.py", line 210, in from_appmanifest
    content = path.read_text(encoding="utf-8")
  File "/usr/lib64/python3.13/pathlib/_local.py", line 546, in read_text
    return PathBase.read_text(self, encoding, errors, newline)
           ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/pathlib/_abc.py", line 632, in read_text
    with self.open(mode='r', encoding=encoding, errors=errors, newline=newline) as f:
         ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/pathlib/_local.py", line 537, in open
    return io.open(self, mode, buffering, encoding, errors, newline)
           ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/run/media/wilbur/SteamLibrary/SteamLibrary/steamapps/appmanifest_1172470.acf'
(base) wilbur@wilbur-G5-5000:~$ protontricks
Traceback (most recent call last):
  File "/home/wilbur/.local/bin/protontricks", line 8, in <module>
    sys.exit(cli())
             ~~~^^
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/cli/main.py", line 32, in cli
    main(args)
    ~~~~^^^^^^
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/cli/util.py", line 175, in wrapper
    return cli_func(self, *args, **kwargs)
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/cli/main.py", line 298, in main
    steam_apps = get_steam_apps(
        steam_root=steam_root, steam_path=steam_path,
        steam_lib_paths=steam_lib_paths
    )
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/steam.py", line 1435, in get_steam_apps
    steam_app = SteamApp.from_appmanifest(
        manifest_path, steam_lib_paths=steam_lib_paths,
        steam_path=steam_path
    )
  File "/home/wilbur/.local/lib/python3.13/site-packages/protontricks/steam.py", line 210, in from_appmanifest
    content = path.read_text(encoding="utf-8")
  File "/usr/lib64/python3.13/pathlib/_local.py", line 546, in read_text
    return PathBase.read_text(self, encoding, errors, newline)
           ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/pathlib/_abc.py", line 632, in read_text
    with self.open(mode='r', encoding=encoding, errors=errors, newline=newline) as f:
         ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.13/pathlib/_local.py", line 537, in open
    return io.open(self, mode, buffering, encoding, errors, newline)
           ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/run/media/wilbur/SteamLibrary/SteamLibrary/steamapps/appmanifest_1172470.acf'

Expected behavior
Protontricks might warn me that the compatdata folder or something for one of the apps was missing, but would still hopefully launch.

System (please complete the following information):

• Distro: Fedora 42 KDE Plasma Edition x86 64-bit
• Protontricks installation method: pip
• Protontricks version: 1.12.1
• Steam version: No beta chosen, using RPM package.

Additional context
Ye, I know this is kind of convoluted and very much an edge case (if it was supposed to work at all), but I figured I'd report it anyway just in case.

Right now, I've added Apex Legends to my account and am attempting to install it from Linux as a workaround (I know it won't run).

[Matoking]

Protontricks first looks for files with file names appmanifest_<appid>.acf in the Steam library folders. It then tries to read them one-by-one. It's the second one that's failing here, with Protontricks trying to read a file that was just listed in the directory but doesn't actually seem to exist.

I suspect it could be a symlink pointing to a nonexistent location under Linux. What is the result if you try running the following commands?

ls -lh /media/wilbur/SteamLibrary/SteamLibrary/steamapps
ls -lh /run/media/wilbur/SteamLibrary/SteamLibrary/steamapps

For example, the commands might list symlinks like this:

❯ ls -lh /bin/sh
lrwxrwxrwx 1 root root 4 May  7 18:46 /bin/sh -> bash*

Also, like the wiki article states, the whole "NTFS disk shared under Linux and Windows" business is unsupported by Steam, so I wouldn't put it past Steam to accidentally break itself and cause an issue like this. Still, it would be good to know what the cause is.

[thelabcat]

I've already kind of patched it up by owning the game on both accounts, so it'll take me awhile to get back to you.