error: Undefined Behavior: `ctlz_nonzero` called on 0 --> $DIR/ctlz_nonzero.rs:LL:CC | LL | ctlz_nonzero(0u8); | ^^^^^^^^^^^^^^^^^ `ctlz_nonzero` called on 0 | = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information = note: BACKTRACE: = note: inside `main` at $DIR/ctlz_nonzero.rs:LL:CC note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace error: aborting due to previous error