1 warning: unused `Result` that must be used
2 --> $DIR/must-use-in-macro-55516.rs:9:5
4 LL | write!(&mut example, "{}", 42);
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
7 = note: `-W unused-must-use` implied by `-W unused`
8 = note: this `Result` may be an `Err` variant, which should be handled
9 = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
11 warning: 1 warning emitted