From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/tools/clippy/tests/ui/mut_mut.rs | 59 ++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/tools/clippy/tests/ui/mut_mut.rs

(limited to 'src/tools/clippy/tests/ui/mut_mut.rs')

diff --git a/src/tools/clippy/tests/ui/mut_mut.rs b/src/tools/clippy/tests/ui/mut_mut.rs
new file mode 100644
index 000000000..be854d941
--- /dev/null
+++ b/src/tools/clippy/tests/ui/mut_mut.rs
@@ -0,0 +1,59 @@
+// aux-build:macro_rules.rs
+
+#![allow(unused, clippy::no_effect, clippy::unnecessary_operation)]
+#![warn(clippy::mut_mut)]
+
+#[macro_use]
+extern crate macro_rules;
+
+fn fun(x: &mut &mut u32) -> bool {
+    **x > 0
+}
+
+fn less_fun(x: *mut *mut u32) {
+    let y = x;
+}
+
+macro_rules! mut_ptr {
+    ($p:expr) => {
+        &mut $p
+    };
+}
+
+#[allow(unused_mut, unused_variables)]
+fn main() {
+    let mut x = &mut &mut 1u32;
+    {
+        let mut y = &mut x;
+    }
+
+    if fun(x) {
+        let y: &mut &mut u32 = &mut &mut 2;
+        **y + **x;
+    }
+
+    if fun(x) {
+        let y: &mut &mut &mut u32 = &mut &mut &mut 2;
+        ***y + **x;
+    }
+
+    let mut z = mut_ptr!(&mut 3u32);
+}
+
+fn issue939() {
+    let array = [5, 6, 7, 8, 9];
+    let mut args = array.iter().skip(2);
+    for &arg in &mut args {
+        println!("{}", arg);
+    }
+
+    let args = &mut args;
+    for arg in args {
+        println!(":{}", arg);
+    }
+}
+
+fn issue6922() {
+    // do not lint from an external macro
+    mut_mut!();
+}
-- 
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