"cannot call methods on dialog prior to initialization" logged when resizing after closing a modal

When using Drupal modal dialog system there is an error that are log to the console of the browser :

Uncaught Error: cannot call methods on dialog prior to initialization; attempted to call method 'option'

This problem is not blocking, is just annoying.

Steps to reproduce

• Go to a page containing a modal dialog like /admin/structure/block
• Click on the link opening the modal (on /admin/structure/block page click on the "Place block" button)
• Close the modal
• Resize the page

Technical steps

• Resizing the window call the Drupal.displace function (misc/displace.js line 56)
• displace trigger a drupalViewportOffsetChange event (line 81)
• This event trigger the resetSize function for dialog (misc/dialog/dialog.position.js line 34)
• Which try to call the dialog method (but dialog has been closed)

Proposed solution

See patch