1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/extern-crate-visibility.rs b/src/test/ui/compile-fail-migration/extern-crate-visibility.rs
new file mode 100644
index 00000000000..6bb88e40910
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+++ b/src/test/ui/compile-fail-migration/extern-crate-visibility.rs
@@ -0,0 +1,34 @@
+// Copyright 2016 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.
+
+mod foo {
+    extern crate core;
+}
+
+// Check that private crates can be used from outside their modules, albeit with warnings
+use foo::core::cell; //~ ERROR extern crate `core` is private
+
+fn f() {
+    foo::core::cell::Cell::new(0); //~ ERROR extern crate `core` is private
+
+    use foo::*;
+    mod core {} // Check that private crates are not glob imported
+}
+
+mod bar {
+    pub extern crate core;
+}
+
+mod baz {
+    pub use bar::*;
+    use self::core::cell; // Check that public extern crates are glob imported
+}
+
+fn main() {}