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-rw-r--r--compiler/rustc_passes/src/liveness.rs4
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/rustc_passes/src/liveness.rs b/compiler/rustc_passes/src/liveness.rs
index 1f65cc8b609..bfbe65b5bfc 100644
--- a/compiler/rustc_passes/src/liveness.rs
+++ b/compiler/rustc_passes/src/liveness.rs
@@ -108,14 +108,14 @@ use std::rc::Rc;
 mod rwu_table;
 
 rustc_index::newtype_index! {
+    #[debug_format = "v({})"]
     pub struct Variable {
-        DEBUG_FORMAT = "v({})",
     }
 }
 
 rustc_index::newtype_index! {
+    #[debug_format = "ln({})"]
     pub struct LiveNode {
-        DEBUG_FORMAT = "ln({})",
     }
 }