.data() exception on jquery 2.0 beta2 when .data() isn't set

[anonymous]

Hi,

Just put in jquery 2.0 b2 in my script and I get an exception.

$('#SomeElement').data('d');

This line breaks if there's no data set for that element. Can't create s jsfiddle because their library options only support beta1 and beta2 was just released a few hours ago.

Sylvain.

[anonymous]

Replying to anonymous:

Hi,

Just put in jquery 2.0 b2 in my script and I get an exception.

$('#SomeElement').data('d');

This line breaks if there's no data set for that element. Can't create a jsfiddle because their library options only support up to beta1, and beta2 was just released a few hours ago.

Sylvain Crx.

[Rick Waldron]

I'll look at this tomorrow

[m_gol]

You can create the jsFiddle, just choose "No-Library (pure JS)" in Frameworks and add an external dependency to jQuery.

Anyway, I can't reproduce the problem, it works fine here: ​http://jsfiddle.net/m_gol/tZy7G/

[Rick Waldron]

Thanks m_gol!

Sylvain, can you take a look at m_gol's fiddle?

[anonymous]

@m_gol: I can see that it works in your jsfiddle but it wasn't working in my code when I made the switch to beta2. I changed my code around to avoid the problem but what I can say is that everything worked fine except that line. My code is about 15,000 lines with a call to jquery every other line long so it's pretty involved.

[sylvain courcoux]

Ok, I got to repro. The problem was occurring because the element hadn't been generated at the time the code was running when the page was initiating.

Here's your jsfidde with beta2 ​http://jsfiddle.net/tZy7G/4/

Here's the jsfiddle with beta1 ​http://jsfiddle.net/2Qbhv/1/

As you can see, in beta1 it doesn't throw the exception but in beta2 it does.

[Rick Waldron]

Just a heads up...

$('#some_element).data('d')

That throws in the beta2 example, because it's syntactically invalid—missing the closing quote at the end of "#some_element"

After correcting that, the issue you reported is confirmed. Patch to follow

[Rick Waldron]

Fixes #13551. Guard against illegal data access by undefined elem-owner

Signed-off-by: Rick Waldron <waldron.rick@…>

Changeset: 692afbcc5f719392c729997eacb234c07d2a6c78

[sylvain courcoux]

@Rick: indeed, I forgot the closing quote in the jsfiddle but overall, thank you for fixing the underlying issue so quickly. Great job!

[Rick Waldron]

Of course and thanks for the report!

[Rick Waldron]

#13564 is a duplicate of this ticket.