[Ur] Javascript alerts

[Saulo Araujo]

Hi,

I have developed a GUI with a lot of push pin buttons that are associated
to boolean sources. When the button is pushed, it sets its source to true.
When the button is released, it sets its source to false. The problem I am
facing is that after pressing those buttons some times, the JavaScript
runtime is showing alerts saying:

cannot read properties _sources of null
cannot read property c of undefined

Is this a bug in the JavaScript runtime?

I did not have time to try to isolate the code that trigger the alerts yet.
In any case, the complete code is available in
https://github.com/saulo2/timesheet-ur/blob/master/timesheet.ur

Sincerely,
Saulo
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