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-rw-r--r--compiler/rustc_middle/src/lint.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/lint.rs b/compiler/rustc_middle/src/lint.rs
index 8d9e0dfd869..086582e60a3 100644
--- a/compiler/rustc_middle/src/lint.rs
+++ b/compiler/rustc_middle/src/lint.rs
@@ -4,6 +4,7 @@ use rustc_data_structures::fx::FxIndexMap;
 use rustc_data_structures::sorted_map::SortedMap;
 use rustc_errors::{Diag, DiagMessage, MultiSpan};
 use rustc_hir::{HirId, ItemLocalId};
+use rustc_macros::HashStable;
 use rustc_session::lint::{
     builtin::{self, FORBIDDEN_LINT_GROUPS},
     FutureIncompatibilityReason, Level, Lint, LintId,