---

yaml
---
r: 224235
b: refs/heads/beta
c: 4f58db4
h: refs/heads/master
i:
  224233: 3f034ba
  224231: 1eedd83
v: v3

Author: bossmc

[refs]

@@ -23,7 +23,7 @@ refs/tags/0.9: 36870b185fc5f5486636d4515f0e22677493f225
 refs/tags/0.10: ac33f2b15782272ae348dbd7b14b8257b2148b5a
 refs/tags/0.11.0: e1247cb1d0d681be034adb4b558b5a0c0d5720f9
 refs/tags/0.12.0: f0c419429ef30723ceaf6b42f9b5a2aeb5d2e2d1
-refs/heads/beta: 610d1e312f4d8ec13755015c69d5ae410039b06a
+refs/heads/beta: 4f58db485d82a8d4d4f03f9584ba6de347f704a5
 refs/tags/1.0.0-alpha: e42bd6d93a1d3433c486200587f8f9e12590a4d7
 refs/heads/tmp: 938f5d7af401e2d8238522fed4a612943b6e77fd
 refs/tags/1.0.0-alpha.2: 4c705f6bc559886632d3871b04f58aab093bfa2f

branches/beta/src/libsyntax/ext/tt/macro_rules.rs

@@ -302,8 +302,8 @@ fn check_lhs_nt_follows(cx: &mut ExtCtxt, lhs: &NamedMatch, sp: Span) {
             tt @ &TtSequence(..) => {
                 check_matcher(cx, Some(tt).into_iter(), &Eof);
             },
-            _ => cx.span_bug(sp, "wrong-structured lhs for follow check (didn't find \
-            a TtDelimited or TtSequence)")
+            _ => cx.span_err(sp, "Invalid macro matcher; matchers must be contained \
+               in balanced delimiters or a repetition indicator")
         },
         _ => cx.span_bug(sp, "wrong-structured lhs for follow check (didn't find a \
            MatchedNonterminal)")