1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/suggestions/fn-or-tuple-struct-with-underscore-args.rs b/src/test/ui/suggestions/fn-or-tuple-struct-with-underscore-args.rs
new file mode 100644
index 000000000..ae1dbfeea
--- /dev/null
+++ b/src/test/ui/suggestions/fn-or-tuple-struct-with-underscore-args.rs
@@ -0,0 +1,19 @@
+fn foo(a: usize, b: usize) -> usize { a }
+
+struct S(usize, usize);
+
+trait T {
+    fn baz(x: usize, y: usize) -> usize { x }
+}
+
+fn main() {
+    let _: usize = foo(_, _);
+    //~^ ERROR `_` can only be used on the left-hand side of an assignment
+    //~| ERROR `_` can only be used on the left-hand side of an assignment
+    let _: S = S(_, _);
+    //~^ ERROR `_` can only be used on the left-hand side of an assignment
+    //~| ERROR `_` can only be used on the left-hand side of an assignment
+    let _: usize = T::baz(_, _);
+    //~^ ERROR `_` can only be used on the left-hand side of an assignment
+    //~| ERROR `_` can only be used on the left-hand side of an assignment
+}