From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:03 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 tests/ui/pattern/issue-52240.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 tests/ui/pattern/issue-52240.rs

(limited to 'tests/ui/pattern/issue-52240.rs')

diff --git a/tests/ui/pattern/issue-52240.rs b/tests/ui/pattern/issue-52240.rs
new file mode 100644
index 000000000..5def55778
--- /dev/null
+++ b/tests/ui/pattern/issue-52240.rs
@@ -0,0 +1,16 @@
+// issue-52240: Can turn immutable into mut with `ref mut`
+
+enum Foo {
+    Bar(i32),
+}
+
+fn main() {
+    let arr = vec!(Foo::Bar(0));
+    if let (Some(Foo::Bar(ref mut val)), _) = (&arr.get(0), 0) {
+        //~^ ERROR cannot borrow data in a `&` reference as mutable
+        *val = 9001;
+    }
+    match arr[0] {
+        Foo::Bar(ref s) => println!("{}", s)
+    }
+}
-- 
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