fix top level attr spans

src/libsyntax/parse/attr.rs

@@ -125,8 +125,8 @@ impl<'a> Parser<'a> {
 
                 self.expect(&token::OpenDelim(token::Bracket))?;
                 let meta_item = self.parse_meta_item()?;
-                let hi = self.last_span.hi;
                 self.expect(&token::CloseDelim(token::Bracket))?;
+                let hi = self.last_span.hi;
 
                 (mk_sp(lo, hi), meta_item, style)
             }

src/test/ui/span/issue-36530.rs

@@ -0,0 +1,14 @@
+// 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.
+
+#[foo]
+mod foo {
+    #![foo]
+}

src/test/ui/span/issue-36530.stderr

@@ -0,0 +1,18 @@
+error: The attribute `foo` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
+  --> $DIR/issue-36530.rs:11:1
+   |
+11 | #[foo]
+   | ^^^^^^
+   |
+   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+
+error: The attribute `foo` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
+  --> $DIR/issue-36530.rs:13:5
+   |
+13 |     #![foo]
+   |     ^^^^^^^
+   |
+   = help: add #![feature(custom_attribute)] to the crate attributes to enable
+
+error: aborting due to 2 previous errors
+