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-rw-r--r--compiler/rustc_infer/src/infer/freshen.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_infer/src/infer/freshen.rs b/compiler/rustc_infer/src/infer/freshen.rs
index ef9c407acef..b2d89523ea8 100644
--- a/compiler/rustc_infer/src/infer/freshen.rs
+++ b/compiler/rustc_infer/src/infer/freshen.rs
@@ -32,6 +32,7 @@
 //! inferencer knows "so far".
 use super::InferCtxt;
 use rustc_data_structures::fx::FxHashMap;
+use rustc_middle::bug;
 use rustc_middle::infer::unify_key::ToType;
 use rustc_middle::ty::fold::TypeFolder;
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeFoldable, TypeSuperFoldable, TypeVisitableExt};