don't touch function name containers when remapping modules - fixes #1160

src/babel/transformation/helpers/name-method.js

@@ -27,6 +27,7 @@ var wrap = function (state, method, id, scope) {
       FUNCTION_ID: id,
       FUNCTION_KEY: scope.generateUidIdentifier(id.name)
     });
+    template.callee._skipModulesRemap = true;
 
     // shim in dummy params to retain function arity, if you try to read the
     // source then you'll get the original since it's proxied so it's all good

src/babel/transformation/modules/_default.js

@@ -46,6 +46,10 @@ var remapVisitor = {
       }
     }
 
+    if (node._skipModulesRemap) {
+      return this.skip();
+    }
+
     if (t.isAssignmentExpression(node) && !node._ignoreModulesRemap) {
       var exported = formatter.getExport(node.left, scope);
       if (exported) {