diff options
Diffstat (limited to 'src/libsyntax/ext/pipes/check.rs')
| -rw-r--r-- | src/libsyntax/ext/pipes/check.rs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libsyntax/ext/pipes/check.rs b/src/libsyntax/ext/pipes/check.rs index 30e7e832db1..29c9e86ec62 100644 --- a/src/libsyntax/ext/pipes/check.rs +++ b/src/libsyntax/ext/pipes/check.rs @@ -41,7 +41,8 @@ impl proto::visitor<(), (), ()> for @ext_ctxt { fn visit_proto(&self, _proto: protocol, _states: &[()]) { } fn visit_state(&self, state: state, _m: &[()]) { - if state.messages.len() == 0 { + let messages = &*state.messages; + if messages.len() == 0 { self.span_warn( state.span, // use a real span! fmt!("state %s contains no messages, \ |