Merging upstream version 1.72.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 44 insertions, 1 deletions

diff --git a/src/tools/clippy/tests/ui/useless_conversion.rs b/src/tools/clippy/tests/ui/useless_conversion.rs
index c75a2bce4..51ba49873 100644
--- a/src/tools/clippy/tests/ui/useless_conversion.rs
+++ b/src/tools/clippy/tests/ui/useless_conversion.rs
@@ -1,7 +1,7 @@
 //@run-rustfix
 
 #![deny(clippy::useless_conversion)]
-#![allow(clippy::unnecessary_wraps)]
+#![allow(clippy::needless_if, clippy::unnecessary_wraps)]
 
 fn test_generic<T: Copy>(val: T) -> T {
     let _ = T::from(val);
@@ -155,6 +155,49 @@ fn main() {
     let _ = vec![s4, s4, s4].into_iter().into_iter();
 }
 
+#[allow(dead_code)]
+fn issue11065_fp() {
+    use std::option::IntoIter;
+    fn takes_into_iter(_: impl IntoIterator<Item = i32>) {}
+
+    macro_rules! x {
+        ($e:expr) => {
+            takes_into_iter($e);
+            let _: IntoIter<i32> = $e; // removing `.into_iter()` leads to a type error here
+        };
+    }
+    x!(Some(5).into_iter());
+}
+
+#[allow(dead_code)]
+fn explicit_into_iter_fn_arg() {
+    fn a<T>(_: T) {}
+    fn b<T: IntoIterator<Item = i32>>(_: T) {}
+    fn c(_: impl IntoIterator<Item = i32>) {}
+    fn d<T>(_: T)
+    where
+        T: IntoIterator<Item = i32>,
+    {
+    }
+    fn f(_: std::vec::IntoIter<i32>) {}
+
+    a(vec![1, 2].into_iter());
+    b(vec![1, 2].into_iter());
+    c(vec![1, 2].into_iter());
+    d(vec![1, 2].into_iter());
+    b([&1, &2, &3].into_iter().cloned());
+
+    b(vec![1, 2].into_iter().into_iter());
+    b(vec![1, 2].into_iter().into_iter().into_iter());
+
+    macro_rules! macro_generated {
+        () => {
+            vec![1, 2].into_iter()
+        };
+    }
+    b(macro_generated!());
+}
+
 #[derive(Copy, Clone)]
 struct Foo<const C: char>;