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-rw-r--r--compiler/rustc_next_trait_solver/src/solve/mod.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_next_trait_solver/src/solve/mod.rs b/compiler/rustc_next_trait_solver/src/solve/mod.rs
index afb86aaf8ab..a58caeecc33 100644
--- a/compiler/rustc_next_trait_solver/src/solve/mod.rs
+++ b/compiler/rustc_next_trait_solver/src/solve/mod.rs
@@ -381,6 +381,7 @@ where
 }
 
 /// The result of evaluating a goal.
+#[derive_where(Debug; I: Interner)]
 pub struct GoalEvaluation<I: Interner> {
     /// The goal we've evaluated. This is the input goal, but potentially with its
     /// inference variables resolved. This never applies any inference constraints