1 files changed, 12 insertions, 0 deletions
diff --git a/tests/ui/fn/fn-closure-mutable-capture.rs b/tests/ui/fn/fn-closure-mutable-capture.rs
new file mode 100644
index 00000000000..97141886fe7
--- /dev/null
+++ b/tests/ui/fn/fn-closure-mutable-capture.rs
@@ -0,0 +1,12 @@
+pub fn bar<F: Fn()>(_f: F) {} //~ NOTE change this to accept `FnMut` instead of `Fn`
+
+pub fn foo() {
+    let mut x = 0;
+    bar(move || x = 1);
+    //~^ ERROR cannot assign to `x`, as it is a captured variable in a `Fn` closure
+    //~| NOTE cannot assign
+    //~| NOTE expects `Fn` instead of `FnMut`
+    //~| NOTE in this closure
+}
+
+fn main() {}