1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/ui/coercion/coerce-mut.rs b/src/test/ui/coercion/coerce-mut.rs
new file mode 100644
index 000000000..43f0b5585
--- /dev/null
+++ b/src/test/ui/coercion/coerce-mut.rs
@@ -0,0 +1,10 @@
+fn f(x: &mut i32) {}
+
+fn main() {
+    let x = 0;
+    f(&x);
+    //~^ ERROR mismatched types
+    //~| expected mutable reference `&mut i32`
+    //~| found reference `&{integer}`
+    //~| types differ in mutability
+}