From 52c3b56b9d8fe3814895b543288d05118b56d9f7 Mon Sep 17 00:00:00 2001
From: Philippe-Cholet <phcholet@orange.fr>
Date: Fri, 27 Oct 2023 08:51:09 +0200
Subject: [PATCH] `Tuple*Combination::fold`: avoid `unwrap`

---
 src/adaptors/mod.rs | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/adaptors/mod.rs b/src/adaptors/mod.rs
index 802256542..b3d307a2a 100644
--- a/src/adaptors/mod.rs
+++ b/src/adaptors/mod.rs
@@ -767,12 +767,11 @@ macro_rules! impl_tuple_combination {
                 F: FnMut(B, Self::Item) -> B,
             {
                 let Self { c, item, mut iter } = self;
-                init = c
-                    .map(|($($X),*,)| {
-                        let z = item.clone().unwrap();
-                        (z, $($X),*)
-                    })
-                    .fold(init, &mut f);
+                if let Some(z) = item.as_ref() {
+                    init = c
+                        .map(|($($X),*,)| (z.clone(), $($X),*))
+                        .fold(init, &mut f);
+                }
                 while let Some(z) = iter.next() {
                     let c: $P<I> = iter.clone().into();
                     init = c