diff options
| -rw-r--r-- | src/librustc/traits/error_reporting.rs | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/src/librustc/traits/error_reporting.rs b/src/librustc/traits/error_reporting.rs index 411e986f62d..a9f3c54bd73 100644 --- a/src/librustc/traits/error_reporting.rs +++ b/src/librustc/traits/error_reporting.rs @@ -535,14 +535,10 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> { return; } else { let trait_ref = trait_predicate.to_poly_trait_ref(); - let (post_message, pre_message) = match self.get_parent_trait_ref( - &obligation.cause.code) - { - Some(t) => { - (format!(" in `{}`", t), format!("within `{}`, ", t)) - } - None => (String::new(), String::new()), - }; + let (post_message, pre_message) = + self.get_parent_trait_ref(&obligation.cause.code) + .map(|t| (format!(" in `{}`", t), format!("within `{}`, ", t))) + .unwrap_or((String::new(), String::new())); let mut err = struct_span_err!( self.tcx.sess, span, |