1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_hir_analysis/src/variance/constraints.rs b/compiler/rustc_hir_analysis/src/variance/constraints.rs
index 4fb7a02f8c9..415b23d812b 100644
--- a/compiler/rustc_hir_analysis/src/variance/constraints.rs
+++ b/compiler/rustc_hir_analysis/src/variance/constraints.rs
@@ -8,6 +8,7 @@ use rustc_hir as hir;
 use rustc_hir::def::DefKind;
 use rustc_middle::ty::{self, GenericArgKind, GenericArgsRef, Ty, TyCtxt};
 use rustc_middle::{bug, span_bug};
+use tracing::{debug, instrument};
 
 use super::terms::VarianceTerm::*;
 use super::terms::*;