Cannot read property 'constructor' of null

[sheldon-sminq]

We use this plugin extensively, recently updated to the latest 1.3.3 version to support HTML5 elements too.

While loading the form with the json data if one of the properties has a null value then we get this issue. Never occurred with the older version.

Uncaught TypeError: Cannot read property 'constructor' of null
   at h (jquery.loadJSON.min.js:18)
   at h (jquery.loadJSON.min.js:18)
   at HTMLFormElement.<anonymous> (jquery.loadJSON.min.js:18)

[kevindb]

What specific version of the jQuery library you're using?
What browsers (and versions) have you tested in?
Please include a link to a JSFiddle or CodePen example of the error so that others can reproduce the issue you're seeing.

[sheldon-sminq]

Jquery Version: 2.1.4
Browsers : Chrome 58.0.3029
https://jsfiddle.net/91715o1j/ sample test

[fvarg00]

Suggested fix for this issue under

341004c