---

yaml
---
r: 226205
b: refs/heads/snap-stage3
c: c8b9e83
h: refs/heads/master
i:
  226203: e03ab7f
v: v3

Author: GuillaumeGomez

[refs]

@@ -1,6 +1,6 @@
 ---
 refs/heads/master: e5d90d98402475b6e154ce216f9efcb80da1a747
-refs/heads/snap-stage3: 9e1ea5e5ee6369128e2a3005bb78edc059fa9195
+refs/heads/snap-stage3: c8b9e8363a15c0476040869d2e6749018ae4a6b3
 refs/heads/try: b53c0f93eedcdedd4fd89bccc5a3a09d1c5cd23e
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596

branches/snap-stage3/src/librustc_resolve/diagnostics.rs

@@ -457,6 +457,25 @@ impl Foo {
 ```
 "##,
 
+E0426: r##"
+An undeclared label was used. Example of erroneous code:
+
+```
+loop {
+    break 'a; // error: use of undeclared label `'a`
+}
+```
+
+Please verify you didn't misspell the label name or you did declare
+it. Example:
+
+```
+'a: loop {
+    break 'a; // ok!
+}
+```
+"##,
+
 E0428: r##"
 A type or module has been defined more than once. Example of erroneous
 code:
@@ -563,7 +582,6 @@ register_diagnostics! {
     E0423, // is a struct variant name, but this expression uses it like a
            // function name
     E0425, // unresolved name
-    E0426, // use of undeclared label
     E0427, // cannot use `ref` binding mode with ...
     E0429, // `self` imports are only allowed within a { } list
     E0434, // can't capture dynamic environment in a fn item