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-rw-r--r--compiler/rustc_middle/src/ty/fold.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/ty/fold.rs b/compiler/rustc_middle/src/ty/fold.rs
index 203e16bea..25890eb15 100644
--- a/compiler/rustc_middle/src/ty/fold.rs
+++ b/compiler/rustc_middle/src/ty/fold.rs
@@ -37,7 +37,8 @@ where
}
fn fold_region(&mut self, r: ty::Region<'tcx>) -> ty::Region<'tcx> {
- let r = r.super_fold_with(self);
+ // This one is a little different, because `super_fold_with` is not
+ // implemented on non-recursive `Region`.
(self.lt_op)(r)
}