avoid trying to replace a node with itself, antipattern!

src/babel/transformation/modules/_default.js

@@ -8,7 +8,8 @@ import * as t from "../../types";
 var remapVisitor = {
   enter(node, parent, scope, formatter) {
     var remap = formatter.internalRemap[node.name];
-    if (this.isReferencedIdentifier() && remap) {
+
+    if (this.isReferencedIdentifier() && remap && node !== remap) {
       if (!scope.hasBinding(node.name) || scope.bindingIdentifierEquals(node.name, formatter.localImports[node.name])) {
         return remap;
       }

src/babel/transformation/transformers/es6/arrow-functions.js

@@ -8,6 +8,4 @@ export function ArrowFunctionExpression(node) {
   node.expression = false;
   node.type = "FunctionExpression";
   node.shadow = true;
-
-  return node;
 }

src/babel/transformation/transformers/es6/destructuring.js

@@ -82,7 +82,7 @@ exports.Function = function (node, parent, scope, file) {
 
   var block = node.body;
   block.body = nodes.concat(block.body);
-  return node;
+  this.checkSelf();
 };
 
 export function CatchClause(node, parent, scope, file) {

src/babel/transformation/transformers/es6/parameters.default.js

@@ -97,5 +97,5 @@ exports.Function = function (node, parent, scope, file) {
     node.body.body = body.concat(node.body.body);
   }
 
-  return node;
+  this.checkSelf();
 };

src/babel/transformation/transformers/es6/parameters.rest.js

@@ -96,7 +96,8 @@ exports.Function = function (node, parent, scope, file) {
       candidate.replaceWith(argsId);
       optimizeMemberExpression(candidate.parent, node.params.length);
     }
-    return node;
+    this.checkSelf();
+    return;
   }
 
   //
@@ -137,5 +138,5 @@ exports.Function = function (node, parent, scope, file) {
   });
   loop._blockHoist = node.params.length + 1;
   node.body.body.unshift(loop);
-  return node;
+  this.checkSelf();
 };

src/babel/traversal/path/index.js

@@ -510,7 +510,7 @@ export default class TraversalPath {
     }
 
     if (this.node === replacement) {
-      throw new Error("You're trying to replace a node with itself which isn't allowed. If you're trying to do a transformer recache then use `this.checkSelf()`");
+      throw new Error("You're trying to replace a node with itself which doesn't make any sense. If you're trying to do a transformer recache then use `this.checkSelf()`");
     }
 
     // normalise inserting an entire AST