[Sharlin]

I’m sure default effects could handle this, just as Rust has some auto traits and default trait bounds. It doesn’t even have to be the full console i/o effect, it can be a specific debug effect that outputs to console in a dev build and to a file or devnull or whatever in release builds, or you could disable it in release builds and the compiler ensures there aren’t stray debug calls left, without needing a specific lint for that.

(Rust does have a similar problem in that debug printing requires the Debug trait bound which can be really annoying when writing generic code. Would be nice if there were a sprinkle of RTTI involved.)