---

yaml
---
r: 3551
b: refs/heads/master
c: a4421cc
h: refs/heads/master
i:
  3549: 83e10a7
  3547: 5d82f9d
  3543: 9511681
  3535: 4bc32d0
  3519: e34a593
v: v3

Author: jdm

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7c8ee712be3680bf9a0ad5bed6b2d348df674857
+refs/heads/master: a4421cc4e8fae4514dc948271f89c21fa69bacee

trunk/src/comp/front/parser.rs

@@ -955,6 +955,9 @@ fn parse_syntax_ext(&parser p) -> @ast::expr {
 
 fn parse_syntax_ext_naked(&parser p, uint lo) -> @ast::expr {
     auto pth = parse_path(p);
+    if (vec::len(pth.node.idents) == 0u) {
+        p.fatal("expected a syntax expander name");
+    }
     auto es = parse_seq(token::LPAREN, token::RPAREN,
                         some(token::COMMA), parse_expr, p);
     auto hi = es.span.hi;

trunk/src/test/compile-fail/ext-noname.rs

@@ -0,0 +1,5 @@
+// error-pattern:expected a syntax expander name
+
+fn main() {
+  #();
+}