SUMMARY:
    Baloo typically excludes source code via Mimetype exclusion, cf: C++ source
    with mimetype "text/x-c++src" is excluded. Rust source is not excluded
    and is therefore indexed (when you have enabled content indexing).

STEPS TO REPRODUCE:
1...
    Enable Baloo content indexing

2...
    Run:

        $ balooctl6 monitor

    (as seems to be the case, you might need to type "balooctl" or "balooctl6")

3...
    Create a Rust file (something.rs) or download a Rust project...

4...
    Watch to see the indexing happen on the monitor and/or check what has been
    indexed with:

        $ balooshow6 -x something.rs

OBSERVED RESULT:
    Baloo will notice the new/unpacked .rs files and content index them. You will see
    the internal search terms for the filename after a "File Name Terms:" and the
    indexed content after a "Plain Test Terms:" when you run balooshow

EXPECTED RESULT:
    Maybe this is not what was wanted and differs from the behaviour with C or
    C++ code which is not content indexed by default.

SOFTWARE/OS VERSIONS:
    Neon Unstable
    Plasma: 6.1.90
    Frameworks: 6.7.0
    Qt: 6.7.2