Auto merge of #28503 - marcusklaas:pub-extern, r=alexcrichton

Fixes #28472.

Author: bors

src/libsyntax/parse/parser.rs

@@ -5037,9 +5037,8 @@ impl<'a> Parser<'a> {
     }
 
     /// Parse a function declaration from a foreign module
-    fn parse_item_foreign_fn(&mut self, vis: ast::Visibility,
+    fn parse_item_foreign_fn(&mut self, vis: ast::Visibility, lo: BytePos,
                              attrs: Vec<Attribute>) -> PResult<P<ForeignItem>> {
-        let lo = self.span.lo;
         try!(self.expect_keyword(keywords::Fn));
 
         let (ident, mut generics) = try!(self.parse_fn_header());
@@ -5058,10 +5057,8 @@ impl<'a> Parser<'a> {
     }
 
     /// Parse a static item from a foreign module
-    fn parse_item_foreign_static(&mut self, vis: ast::Visibility,
+    fn parse_item_foreign_static(&mut self, vis: ast::Visibility, lo: BytePos,
                                  attrs: Vec<Attribute>) -> PResult<P<ForeignItem>> {
-        let lo = self.span.lo;
-
         try!(self.expect_keyword(keywords::Static));
         let mutbl = try!(self.eat_keyword(keywords::Mut));
 
@@ -5557,11 +5554,11 @@ impl<'a> Parser<'a> {
 
         if self.check_keyword(keywords::Static) {
             // FOREIGN STATIC ITEM
-            return Ok(Some(try!(self.parse_item_foreign_static(visibility, attrs))));
+            return Ok(Some(try!(self.parse_item_foreign_static(visibility, lo, attrs))));
         }
         if self.check_keyword(keywords::Fn) || self.check_keyword(keywords::Unsafe) {
             // FOREIGN FUNCTION ITEM
-            return Ok(Some(try!(self.parse_item_foreign_fn(visibility, attrs))));
+            return Ok(Some(try!(self.parse_item_foreign_fn(visibility, lo, attrs))));
         }
 
         // FIXME #5668: this will occur for a macro invocation:

src/test/compile-fail/issue-28472.rs

@@ -0,0 +1,24 @@
+// Copyright 2012-2015 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.
+
+// Check that the visibility modifier is included in the span of foreign items.
+
+extern {
+  fn foo();
+
+  pub //~ ERROR duplicate definition
+  fn foo();
+
+  pub //~ ERROR duplicate definition
+  static mut foo: u32;
+}
+
+fn main() {
+}