1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/closures/issue-82438-mut-without-upvar.rs b/src/test/ui/closures/issue-82438-mut-without-upvar.rs
new file mode 100644
index 000000000..5d88e1e77
--- /dev/null
+++ b/src/test/ui/closures/issue-82438-mut-without-upvar.rs
@@ -0,0 +1,28 @@
+use std::error::Error;
+struct A {
+}
+
+impl A {
+    pub fn new() -> A {
+        A {
+        }
+    }
+
+    pub fn f<'a>(
+        &'a self,
+        team_name: &'a str,
+        c: &'a mut dyn FnMut(String, String, u64, u64)
+    ) -> Result<(), Box<dyn Error>> {
+        Ok(())
+    }
+}
+
+
+fn main() {
+    let A = A::new();
+    let participant_name = "A";
+
+    let c = |a, b, c, d| {};
+
+    A.f(participant_name, &mut c); //~ ERROR cannot borrow
+}