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-rw-r--r--compiler/rustc_middle/src/traits/specialization_graph.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/traits/specialization_graph.rs b/compiler/rustc_middle/src/traits/specialization_graph.rs
index ba29d4040a1..ff5d51bcb66 100644
--- a/compiler/rustc_middle/src/traits/specialization_graph.rs
+++ b/compiler/rustc_middle/src/traits/specialization_graph.rs
@@ -5,6 +5,7 @@ use crate::ty::{self, TyCtxt};
 use rustc_data_structures::fx::FxIndexMap;
 use rustc_errors::ErrorGuaranteed;
 use rustc_hir::def_id::{DefId, DefIdMap};
+use rustc_macros::{HashStable, TyDecodable, TyEncodable};
 use rustc_span::symbol::sym;
 
 /// A per-trait graph of impls in specialization order. At the moment, this