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-rw-r--r--compiler/rustc_middle/src/ty/structural_impls.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/ty/structural_impls.rs b/compiler/rustc_middle/src/ty/structural_impls.rs
index f14ca7ae4b7..a62379def53 100644
--- a/compiler/rustc_middle/src/ty/structural_impls.rs
+++ b/compiler/rustc_middle/src/ty/structural_impls.rs
@@ -402,6 +402,7 @@ TrivialTypeTraversalImpls! {
     ::rustc_span::symbol::Symbol,
     ::rustc_hir::def::Res,
     ::rustc_hir::def_id::LocalDefId,
+    ::rustc_hir::ByRef,
     ::rustc_hir::HirId,
     ::rustc_hir::MatchSource,
     ::rustc_target::asm::InlineAsmRegOrRegClass,