From 1d29966d3bf89a6b05f49005551def3b32987155 Mon Sep 17 00:00:00 2001
From: Michael Hewson <michael@michaelhewson.ca>
Date: Tue, 7 Nov 2017 14:32:59 -0500
Subject: [PATCH] wrap error code in DiagnosticId::Error so it compiles

---
 src/librustc_typeck/check/wfcheck.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/librustc_typeck/check/wfcheck.rs b/src/librustc_typeck/check/wfcheck.rs
index a75f35be1f3..89dbd20b699 100644
--- a/src/librustc_typeck/check/wfcheck.rs
+++ b/src/librustc_typeck/check/wfcheck.rs
@@ -22,7 +22,7 @@ use rustc::middle::lang_items;
 use syntax::ast;
 use syntax::feature_gate::{self, GateIssue};
 use syntax_pos::Span;
-use errors::DiagnosticBuilder;
+use errors::{DiagnosticBuilder, DiagnosticId};
 
 use rustc::hir::intravisit::{self, Visitor, NestedVisitorMap};
 use rustc::hir;
@@ -489,7 +489,7 @@ impl<'a, 'gcx> CheckTypeWellFormedVisitor<'a, 'gcx> {
                 fcx.tcx.sess.diagnostic().mut_span_err(span, &format!("invalid `self` type: {:?}", self_arg_ty))
                 .note(&format!("type must be `{:?}` or a type that dereferences to it`", self_ty))
                 .help("consider changing to `self`, `&self`, `&mut self`, or `self: Box<Self>`")
-                .code("E0307".into())
+                .code(DiagnosticId::Error("E0307".into()))
                 .emit();
                 break
             }