Destroying a date picker breaks another one

[mme]

What I did:

• Wrote code: ​https://jsfiddle.net/x85hfnxr/1/
• Executed code (second date picker gets destroyed)
• Hovered over first date picker

Result:

• Error on console: "TypeError: datepicker_instActive is null"

Expectation:

• First date picker continues to work

Tested with Firefox 40.0.3 on Windows 7 Pro SP1

[mme]

• similar to ticket 10698
• maybe caused by ticket 10668

[mme]

The error does not occur with the following patch:

5769c5769
< 	if (!$.datepicker._isDisabledDatepicker( datepicker_instActive.inline? datepicker_instActive.dpDiv.parent()[0] : datepicker_instActive.input[0])) {
---
> 	if (!datepicker_instActive || !$.datepicker._isDisabledDatepicker( datepicker_instActive.inline? datepicker_instActive.dpDiv.parent()[0] : datepicker_instActive.input[0])) {

[ktowen]

Any news with this?