---

yaml
---
r: 227641
b: refs/heads/try
c: 6471dcc
h: refs/heads/master
i:
  227639: d69a2d8
v: v3

Author: GuillaumeGomez

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: aca2057ed5fb7af3f8905b2bc01f72fa001c35c8
 refs/heads/snap-stage3: 1af31d4974e33027a68126fa5a5a3c2c6491824f
-refs/heads/try: 8c5572fc2114fa2e8156c89cda89c799c9c3e9e0
+refs/heads/try: 6471dccd3b3a5b83b4fccecffc94047e1086ca2f
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try/src/librustc/diagnostics.rs

@@ -256,6 +256,21 @@ See [RFC 911] for more details on the design of `const fn`s.
 [RFC 911]: https://github.com/rust-lang/rfcs/blob/master/text/0911-const-fn.md
 "##,
 
+E0016: r##"
+Blocks in constants may only contain items (such as constant, function
+definition, etc...) and a tail expression. Example:
+
+```
+const FOO: i32 = { let x = 0; x }; // 'x' isn't an item!
+```
+
+To avoid it, you have to replace the non-item object:
+
+```
+const FOO: i32 = { const X : i32 = 0; X };
+```
+"##,
+
 E0018: r##"
 The value of static and const variables must be known at compile time. You
 can't cast a pointer as an integer because we can't know what value the