Cache can't be garbage collected

[ebonetti]

Goroutine (associated with cache worker) prevent cache from being collected. In my opinion there should be a way to stop it. Alternatively, this fact should be documented.

Keep up the good work, Enrico

[karlseguin]

Are you ok with the cache being unusable once Stop is called? Is panic'ing a little extreme or acceptable?

Consider: https://github.com/karlseguin/ccache/commit/bfa769c6b6c794afa640d7259ebc270c7da037a7

[ebonetti]

Edited: there is a big problem with "deletables" channel: goroutines waiting to pass values are blocked.. In "worker", just before exiting goroutine, the Cache should be cleared (enforcing user to stop using it) and then close "deletables". This way it panics on both channel on a send attempt, but in my opinion panicking isn't right.. Enrico