Rollup merge of #56761 - estebank:path-display, r=zackmdavis

Suggest using `.display()` when trying to print a `Path`

Fix #38997.

1 files changed, 7 insertions, 2 deletions

diff --git a/src/libcore/fmt/mod.rs b/src/libcore/fmt/mod.rs
index 0c5256b981e..8e0caa5ae33 100644
--- a/src/libcore/fmt/mod.rs
+++ b/src/libcore/fmt/mod.rs
@@ -609,10 +609,15 @@ pub trait Debug {
 /// println!("The origin is: {}", origin);
 /// ```
 #[rustc_on_unimplemented(
+    on(
+        _Self="std::path::Path",
+        label="`{Self}` cannot be formatted with the default formatter; call `.display()` on it",
+        note="call `.display()` or `.to_string_lossy()` to safely print paths, \
+              as they may contain non-Unicode data"
+    ),
     message="`{Self}` doesn't implement `{Display}`",
     label="`{Self}` cannot be formatted with the default formatter",
-    note="in format strings you may be able to use `{{:?}}` \
-          (or {{:#?}} for pretty-print) instead",
+    note="in format strings you may be able to use `{{:?}}` (or {{:#?}} for pretty-print) instead",
 )]
 #[doc(alias = "{}")]
 #[stable(feature = "rust1", since = "1.0.0")]