Undefined index: enabled in menu_edit_item_submit()

Breaking off from #1913794: Menu items only showing <view> vs. items from view.

Confirmed: Error message occurs when creating a new menu view item after clicking submit.

robbt originally reported:

Error message
Notice: Undefined index: enabled in menu_edit_item_submit() (line 422 of /var/www/modules/menu/menu.admin.inc).

sportel reported:

I'm also having the same error. I noticed that when adding a new link to a menu, and setting it to "view" and checking "Enabled" and hit "Save", this new menu link (view) isn't set to Enabled. This is when the error is shown. Once I check "Enabled" on the menu links page (admin/structure/menu/manage/main-menu), the error disappeared and didn't come back. But, the newly made Menu View has .../ as a path, like this issues title says.

It's all easily recreated: just go to the sandbox demo-page (link on module-page) and create a view of some articles. And than add a Menu View to the main menu.

I hope this helps solving the problems.

Mike.