Choose another error code

src/librustc/diagnostics.rs

@@ -2026,5 +2026,5 @@ fn foo<'a>(x: &'a i32, y: &i32) -> &'a i32 {
     E0495, // cannot infer an appropriate lifetime due to conflicting requirements
     E0566, // conflicting representation hints
     E0623, // lifetime mismatch where both parameters are anonymous regions
-    E0625, // generators cannot have explicit arguments
+    E0628, // generators cannot have explicit arguments
 }

src/librustc/hir/lowering.rs

@@ -1980,7 +1980,7 @@ fn lower_expr(&mut self, e: &Expr) -> hir::Expr {
                             e
                         });
                         if is_generator && !decl.inputs.is_empty() {
-                            span_err!(this.sess, fn_decl_span, E0625,
+                            span_err!(this.sess, fn_decl_span, E0628,
                                       "generators cannot have explicit arguments");
                             this.sess.abort_if_errors();
                         }

src/test/ui/generator/no-arguments-on-generators.stderr

@@ -1,4 +1,4 @@
-error[E0625]: generators cannot have explicit arguments
+error[E0628]: generators cannot have explicit arguments
   --> $DIR/no-arguments-on-generators.rs:14:15
    |
 14 |     let gen = |start| { //~ ERROR generators cannot have explicit arguments