Conditional Operator in ExpressionAnimation causing system crashing error about windowscompositionsamples

[tomzorz]

Can confirm, same happens here. (Tested on Lumia 950, latest stable (not-insider) OS version.)

[pgills]

Thanks @JustinXinLiu @tomzorz. We'll get some folks to take a look at it.

Just to clarify:

Found on build(s): 10586, 14527
Repo Steps:

1. Create an ExpressionAnimation with Conditional Operator Expression without parenthesis (like you have above)
2. Play the ExpressionAnimation on a Visual

Expected Results:
ExpressionAnimation runs conditionally.

Actual Results:
Screen goes black and feels like a video card failure.

[JustinXinLiu]

Yes that's right thanks @pgills!

[patsiu]

Hey @JustinXinLiu!

Sorry for the delay on getting back to you on this. We have a hunch on what you're running into - to verify, can you try the following out for us: In your ternary operator, remove the parentheses you added in to make it work and add in your condition portion a sequence of nested 0's such as [...] + (0 + (0 + (0 + (0 + (0+0))))). (The more complex your "if true" and "if false" portions are, increase the number of nested 0's in the condition)

So in your example above, it will look like A < 0 + (0 + (0 + (0 + (0 + (0+0))))) ? B + C: B + D.

Let us know what happens. Thanks!

[JustinXinLiu]

@patsiu you guys must have found the issue! After I added (0 + (0 + (0 + (0 + (0 + 0))))) to all the conditional portions both my phone and PC are working. 👍

[patsiu]

Awesome - thanks for verifying @JustinXinLiu !

We have a fix for this issue, which will come in a future insider build. Until then, use the nested 0's model as a temporary workaround (especially with more complex ternary operators).

[JustinXinLiu]

Sure thanks guys! I will close the issue once the new build comes out.

[JustinXinLiu]

Hey guys looks like the issue has been fixed in build 14267? I just updated my PC and it no longer crashes. So I am closing it now.

[pgills]

Thanks @JustinXinLiu.