Use diagnostic method for diagnostics

Author: oli-obk

compiler/rustc_hir_typeck/src/callee.rs

@@ -637,7 +637,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 return;
             };
 
-            let pick = self.confirm_method(
+            let pick = self.confirm_method_for_diagnostic(
                 call_expr.span,
                 callee_expr,
                 call_expr,