--- /dev/null
+error[E0277]: `NotDebug` doesn't implement `std::fmt::Debug`
+ --> $DIR/dbg-macro-requires-debug.rs:8:23
+ |
+LL | let _: NotDebug = dbg!(NotDebug);
+ | ^^^^^^^^^^^^^^ `NotDebug` cannot be formatted using `{:?}`
+ |
+ = help: the trait `std::fmt::Debug` is not implemented for `NotDebug`
+ = note: add `#[derive(Debug)]` or manually implement `std::fmt::Debug`
+ = note: required because of the requirements on the impl of `std::fmt::Debug` for `&NotDebug`
+ = note: required by `std::fmt::Debug::fmt`
+ = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.