fixes #114896

2 files changed, 18 insertions, 0 deletions

diff --git a/tests/ui/pattern/issue-114896.rs b/tests/ui/pattern/issue-114896.rs
new file mode 100644
index 00000000000..cde37f658d6
--- /dev/null
+++ b/tests/ui/pattern/issue-114896.rs
@@ -0,0 +1,7 @@
+fn main() {
+    fn x(a: &char) {
+        let &b = a;
+        b.make_ascii_uppercase();
+//~^ cannot borrow `b` as mutable, as it is not declared as mutable
+    }
+}
diff --git a/tests/ui/pattern/issue-114896.stderr b/tests/ui/pattern/issue-114896.stderr
new file mode 100644
index 00000000000..ffeb7bc1365
--- /dev/null
+++ b/tests/ui/pattern/issue-114896.stderr
@@ -0,0 +1,11 @@
+error[E0596]: cannot borrow `b` as mutable, as it is not declared as mutable
+  --> $DIR/issue-114896.rs:4:9
+   |
+LL |         let &b = a;
+   |             -- help: consider changing this to be mutable: `&(mut b)`
+LL |         b.make_ascii_uppercase();
+   |         ^ cannot borrow as mutable
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0596`.