1 files changed, 8 insertions, 0 deletions
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-missing-mut.rs b/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-missing-mut.rs
new file mode 100644
index 000000000..5c0ceb23d
--- /dev/null
+++ b/src/test/ui/unboxed-closures/unboxed-closures-infer-fnmut-missing-mut.rs
@@ -0,0 +1,8 @@
+// Test that we are able to infer a suitable kind for this closure
+// that is just called (`FnMut`).
+
+fn main() {
+    let mut counter = 0;
+    let tick = || counter += 1;
+    tick(); //~ ERROR cannot borrow `tick` as mutable, as it is not declared as mutable
+}