1 files changed, 4 insertions, 2 deletions
diff --git a/compiler/rustc_borrowck/src/region_infer/values.rs b/compiler/rustc_borrowck/src/region_infer/values.rs
index 7498ddccf..c3dfeedc2 100644
--- a/compiler/rustc_borrowck/src/region_infer/values.rs
+++ b/compiler/rustc_borrowck/src/region_infer/values.rs
@@ -90,12 +90,14 @@ impl RegionValueElements {
 rustc_index::newtype_index! {
     /// A single integer representing a `Location` in the MIR control-flow
     /// graph. Constructed efficiently from `RegionValueElements`.
-    pub struct PointIndex { DEBUG_FORMAT = "PointIndex({})" }
+    #[debug_format = "PointIndex({})"]
+    pub struct PointIndex {}
 }
 
 rustc_index::newtype_index! {
     /// A single integer representing a `ty::Placeholder`.
-    pub struct PlaceholderIndex { DEBUG_FORMAT = "PlaceholderIndex({})" }
+    #[debug_format = "PlaceholderIndex({})"]
+    pub struct PlaceholderIndex {}
 }
 
 /// An individual element in a region value -- the value of a