Add separate debug symobls test for real

[drbrain]

82 got merged before I added the test

I wanted to separate the refactor from adding the test, but started writing them on macOS before I moved over to linux to run the actual test which meant I didn't get all my cleanups in before completing the test.

🙇🏻‍♂️

[kornelski]

Please don't change formatting of unrelated lines. Don't use editors that force rustfmt. I deliberately don't use rustfmt in any of my projects, because it causes too much useless vertical sprawl.

[drbrain]

I removed my changes to formatting and force-pushed for cleaner history.

[kornelski]

Thank you