Fix duplicate error code

src/librustc_typeck/check/wfcheck.rs

@@ -300,11 +300,11 @@ impl<'ccx, 'gcx> CheckTypeWellFormedVisitor<'ccx, 'gcx> {
         if !items.is_empty() {
             error_380(self.ccx, span);
         } else if has_ty_params {
-            err = Some(struct_span_err!(self.tcx().sess, span, E0566,
+            err = Some(struct_span_err!(self.tcx().sess, span, E0567,
                 "traits with auto impls (`e.g. impl \
                     Trait for ..`) can not have type parameters"));
         } else if has_predicates {
-            err = Some(struct_span_err!(self.tcx().sess, span, E0565,
+            err = Some(struct_span_err!(self.tcx().sess, span, E0568,
                 "traits with auto impls (`e.g. impl \
                     Trait for ..`) cannot have predicates"));
         }

src/librustc_typeck/diagnostics.rs

@@ -4072,6 +4072,6 @@ register_diagnostics! {
     E0563, // cannot determine a type for this `impl Trait`: {}
     E0564, // only named lifetimes are allowed in `impl Trait`,
            // but `{}` was found in the type `{}`
-    E0565, // auto-traits can not have predicates,
-    E0566, // auto traits can not have type parameters
+    E0567, // auto traits can not have type parameters
+    E0568, // auto-traits can not have predicates,
 }

src/test/compile-fail/traits-inductive-overflow-supertrait-oibit.rs

@@ -14,7 +14,7 @@
 
 #![feature(optin_builtin_traits)]
 
-trait Magic: Copy {} //~ ERROR E0565
+trait Magic: Copy {} //~ ERROR E0568
 impl Magic for .. {}
 
 fn copy<T: Magic>(x: T) -> (T, T) { (x, x) }

src/test/compile-fail/typeck-auto-trait-no-supertraits-2.rs

@@ -10,8 +10,8 @@
 
 #![feature(optin_builtin_traits)]
 
-trait Magic : Sized where Option<Self> : Magic {} //~ ERROR E0565
-impl Magic for .. {} 
+trait Magic : Sized where Option<Self> : Magic {} //~ ERROR E0568
+impl Magic for .. {}
 impl<T:Magic> Magic for T {}
 
 fn copy<T: Magic>(x: T) -> (T, T) { (x, x) }

src/test/compile-fail/typeck-auto-trait-no-supertraits.rs

@@ -23,7 +23,7 @@
 // type that contains a mutable reference, enabling
 // mutable aliasing.
 //
-// You can imagine an even more dangerous test, 
+// You can imagine an even more dangerous test,
 // which currently compiles on nightly.
 //
 // fn main() {
@@ -34,8 +34,8 @@
 
 #![feature(optin_builtin_traits)]
 
-trait Magic: Copy {} //~ ERROR E0565
-impl Magic for .. {} 
+trait Magic: Copy {} //~ ERROR E0568
+impl Magic for .. {}
 impl<T:Magic> Magic for T {}
 
 fn copy<T: Magic>(x: T) -> (T, T) { (x, x) }

src/test/compile-fail/typeck-auto-trait-no-typeparams.rs

@@ -10,5 +10,5 @@
 
 #![feature(optin_builtin_traits)]
 
-trait Magic<T> {} //~ ERROR E0566
+trait Magic<T> {} //~ ERROR E0567
 impl Magic<isize> for .. {}