From 9abd785543710c382b99a8346a1e360aa539da13 Mon Sep 17 00:00:00 2001
From: est31 <MTest31@outlook.com>
Date: Wed, 23 Nov 2022 13:54:48 +0100
Subject: [PATCH] Add regression test for issue 99938

That issue was a dupe of 99852, but it's always better to
have multiple regression tests rather than one.
---
 .../ui/rfc-2497-if-let-chains/issue-99938.rs  | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 src/test/ui/rfc-2497-if-let-chains/issue-99938.rs

diff --git a/src/test/ui/rfc-2497-if-let-chains/issue-99938.rs b/src/test/ui/rfc-2497-if-let-chains/issue-99938.rs
new file mode 100644
index 0000000000000..bd81ce0b19c06
--- /dev/null
+++ b/src/test/ui/rfc-2497-if-let-chains/issue-99938.rs
@@ -0,0 +1,31 @@
+// compile-flags: -Zvalidate-mir -C opt-level=3
+// build-pass
+#![feature(let_chains)]
+struct TupleIter<T, I: Iterator<Item = T>> {
+    inner: I,
+}
+
+impl<T, I: Iterator<Item = T>> Iterator for TupleIter<T, I> {
+    type Item = (T, T, T);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let inner = &mut self.inner;
+
+        if let Some(first) = inner.next()
+            && let Some(second) = inner.next()
+            && let Some(third) = inner.next()
+        {
+            Some((first, second, third))
+        } else {
+            None
+        }
+    }
+}
+
+fn main() {
+    let vec: Vec<u8> = Vec::new();
+    let mut tup_iter = TupleIter {
+        inner: vec.into_iter(),
+    };
+    tup_iter.next();
+}