diff options
| -rw-r--r-- | src/librustc/ty/mod.rs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustc/ty/mod.rs b/src/librustc/ty/mod.rs index c9bdf22ca8e..a54bf5079ca 100644 --- a/src/librustc/ty/mod.rs +++ b/src/librustc/ty/mod.rs @@ -1589,8 +1589,8 @@ rustc_index::newtype_index! { /// declared, but a type name in a non-zero universe is a placeholder /// type -- an idealized representative of "types in general" that we /// use for checking generic functions. - #[derive(HashStable)] pub struct UniverseIndex { + derive [HashStable] DEBUG_FORMAT = "U{}", } } |