The problem of installing the Rust compiler

Most of the time Linux “just works,” but sometimes all the pieces don’t play together nicely. After installing the Rust compiler, I couldn’t get it to run without typing out the full path to the program. If you are coming from the Windows world, this is the expected behavior because Windows is a brain-damaged OS, but in the Linux/UNIX world we expect commands to work everywhere without including the path. So I filed a bug report with the LightDM display manager and with the Rust compiler to ask them to set the PATH correctly:
https://bugs.launchpad.net/lightdm/+bug/1671026
https://github.com/rust-lang/rust/issues/40354
My prediction is that LightDM will ignore my bug report (since it is developed by Ubuntu which tends to ignore bug reports) and the people at Mozilla who develop Rust will say, “It’s not our problem if LightDM doesn’t want to conform to the convention of putting session configuration in $HOME/.profile.”
And I will get annoyed that I just wasted an hour of my time tracking down this bug and reporting it, rather than getting some extra sleep that would make me a much happier camper tomorrow.

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