Using an `@Model` class as a parameter for a compo...

# compose

[Can]

Using an @Model class as a parameter for a compose function does not seem to work right now? 🤔

Using an `@Model` class as a parameter for a compose function does not seem to work right now? :thinking_face:

[Luca Nicoletti]

Can you post the code causing this?

[Can]

I resolved it, this seem to be caused by a race-condition somewhere

[Can]

Full stacktrace

[Can]

Model class

[Can]

Stateful List

[Can]

this should be it

[Can]

MainActivity might be relevant

[Can]

Crash is resolved when i initialize values in my model with an empty array and fill it with something meaningful later

[Luca Nicoletti]

so by calling values = currentTimestampAsArray() in the constructor?

[Luca Nicoletti]

It’s not a race-condition at all, you were just defining a non null IntArray without providing a value in the constructor of the class. That was the problem. You can also specify it as a lateinit and avoid calling currentTimestampAsArray 2 times

[Can]

Yeah - but initializing values in my constructor aka init block should be perfectly fine, shouldn’t it?

[Can]

There shouldn’t be a need to declare values as lateinit in this case since it’s never in an undefined state before my constructor finishes

[Luca Nicoletti]

if you were not doing this: values = currentTimestampAsArray() outside the launch that was the problem

[Can]

But as you can see in the code i did (it wouldn’t compile if i wouldnt have)

[Luca Nicoletti]

So this code is crashing? It was not clear.

[Can]

Yes, this code is crashing on runtime - sorry for the missing clarity

[Leland Richardson [G]]

i’m pretty sure this is just a bug

[Leland Richardson [G]]

there are some situations where @Model codegens the wrong code inside of init functions (and a few other corner cases). If you wouldn’t mind creating a bug with this code and tagging me, it would be much appreciated! - thanks

[Can]

Will do - thanks!

[Can]

@Leland Richardson [G] there you go: https://issuetracker.google.com/issues/144668818

[Can]

@Chuck Jazdzewski [G] @Leland Richardson [G] Thanks for the rapid fix! You guys are awesome!

[Leland Richardson [G]]

👍 all chuck!