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Fix obscure compilation error

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This commit is contained in:
Masood Malekghassemi 2016-04-13 07:48:53 -07:00
parent e45c7955e9
commit de82fc4dc6
4 changed files with 16 additions and 9 deletions
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2
src/librustc/diagnostics.rs
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@ -1544,5 +1544,5 @@ register_diagnostics! {
E0490, // a value of type `..` is borrowed for too long
E0491, // in type `..`, reference has a longer lifetime than the data it...
E0495, // cannot infer an appropriate lifetime due to conflicting requirements
E0524, // the closure implements `..` but not `..`
E0524, // expected a closure that implements `..` but this closure only implements `..`
}

7
src/librustc/traits/error_reporting.rs
View file

@ -471,9 +471,10 @@ pub fn report_selection_error<'a, 'tcx>(infcx: &InferCtxt<'a, 'tcx>,
let closure_span = infcx.tcx.map.span_if_local(closure_def_id).unwrap();
let mut err = struct_span_err!(
infcx.tcx.sess, closure_span, E0524,
"the closure implements `{}` but not `{}`",
found_kind,
kind);
"expected a closure that implements the `{}` trait, but this closure \
only implements `{}`",
kind,
found_kind);
err.span_note(
obligation.cause.span,
&format!("the requirement to implement `{}` derives from here", kind));