diff options
| -rw-r--r-- | src/librustc/middle/typeck/collect.rs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/librustc/middle/typeck/collect.rs b/src/librustc/middle/typeck/collect.rs index 8356b06e8a6..398e0fd4ac7 100644 --- a/src/librustc/middle/typeck/collect.rs +++ b/src/librustc/middle/typeck/collect.rs @@ -503,10 +503,11 @@ pub fn compare_impl_method(tcx: ty::ctxt, if vec::len(impl_m.fty.sig.inputs) != vec::len(trait_m.fty.sig.inputs) { tcx.sess.span_err( cm.span, - fmt!("method `%s` has %u parameters \ + fmt!("method `%s` has %u parameter%s \ but the trait has %u", *tcx.sess.str_of(trait_m.ident), vec::len(impl_m.fty.sig.inputs), + if vec::len(impl_m.fty.sig.inputs) == 1 { "" } else { "s" }, vec::len(trait_m.fty.sig.inputs))); return; } |