From 70a6d7b012822576ca299b07f612392ca1e0fb91 Mon Sep 17 00:00:00 2001
From: Jason Newcomb <jsnewcomb@pm.me>
Date: Sat, 15 Jan 2022 00:15:25 -0500
Subject: [PATCH] Erase late bound regions in `iter_not_returning_iterator`

---
 clippy_lints/src/iter_not_returning_iterator.rs | 2 +-
 tests/ui/iter_not_returning_iterator.rs         | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/clippy_lints/src/iter_not_returning_iterator.rs b/clippy_lints/src/iter_not_returning_iterator.rs
index d3bdc819a9f2..b56d87c5348c 100644
--- a/clippy_lints/src/iter_not_returning_iterator.rs
+++ b/clippy_lints/src/iter_not_returning_iterator.rs
@@ -66,7 +66,7 @@ impl<'tcx> LateLintPass<'tcx> for IterNotReturningIterator {
 
 fn check_sig(cx: &LateContext<'_>, name: &str, sig: &FnSig<'_>, fn_id: LocalDefId) {
     if sig.decl.implicit_self.has_implicit_self() {
-        let ret_ty = cx.tcx.fn_sig(fn_id).skip_binder().output();
+        let ret_ty = cx.tcx.erase_late_bound_regions(cx.tcx.fn_sig(fn_id).output());
         let ret_ty = cx
             .tcx
             .try_normalize_erasing_regions(cx.param_env, ret_ty)
diff --git a/tests/ui/iter_not_returning_iterator.rs b/tests/ui/iter_not_returning_iterator.rs
index 2c91e02e8422..cce216fc649b 100644
--- a/tests/ui/iter_not_returning_iterator.rs
+++ b/tests/ui/iter_not_returning_iterator.rs
@@ -64,4 +64,11 @@ impl S {
     }
 }
 
+struct S2([u8]);
+impl S2 {
+    fn iter(&self) -> core::slice::Iter<u8> {
+        self.0.iter()
+    }
+}
+
 fn main() {}