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That sounds pretty conclusively like a bug in Ur/Web itself
somewhere, if you aren't using the FFI! However, I see that your
application <i>is</i> using the FFI. ;-)<br>
<br>
It would be very helpful if you could try to isolate the problem to
a test case that doesn't use the FFI.<br>
<br>
<div class="moz-cite-prefix">On 08/02/2016 10:43 AM, Saulo Araujo
wrote:<br>
</div>
<blockquote
cite="mid:CA+ckhoSmOoJCGcowaVtfRVMCmk_FBZ=bX+Cbh=6WbRC_nZ=3nA@mail.gmail.com"
type="cite">
<div dir="ltr">Hi,
<div><br>
</div>
<div>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:</div>
<div><br>
</div>
<div>
<div>cannot read properties _sources of null</div>
<div>cannot read property c of undefined</div>
</div>
<div><br>
</div>
<div>Is this a bug in the JavaScript runtime?</div>
<div><br>
</div>
<div>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 <a moz-do-not-send="true"
href="https://github.com/saulo2/timesheet-ur/blob/master/timesheet.ur">https://github.com/saulo2/timesheet-ur/blob/master/timesheet.ur</a></div>
<div><br>
</div>
<div>Sincerely,</div>
<div>Saulo</div>
</div>
</blockquote>
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