Rollup merge of #22516 - leejunseok:nonpub_field_sugg, r=jakub-

closes #22421

src/test/compile-fail/suggest-private-fields.rs

@@ -0,0 +1,36 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// aux-build:struct-field-privacy.rs
+
+extern crate "struct-field-privacy" as xc;
+
+use xc::B;
+
+struct A {
+    pub a: u32,
+    b: u32,
+}
+
+fn main () {
+    // external crate struct
+    let k = B {
+        aa: 20, //~ ERROR structure `struct-field-privacy::B` has no field named `aa`
+        //~^ HELP did you mean `a`?
+        bb: 20, //~ ERROR structure `struct-field-privacy::B` has no field named `bb`
+    };
+    // local crate struct
+    let l = A {
+        aa: 20, //~ ERROR structure `A` has no field named `aa`
+        //~^ HELP did you mean `a`?
+        bb: 20, //~ ERROR structure `A` has no field named `bb`
+        //~^ HELP did you mean `b`?
+    };
+}