After Upgrading to Kotlin 2.0 and Compose 1.6.10 i...

# compose

[Vaibhav Jaiswal]

After Upgrading to Kotlin 2.0 and Compose 1.6.10
i am getting this error
> @Composable invocations can only happen from the context of a @Composable function
On this block

supportingText = {
    errors.organisation?.let(::errorText)
        ?: {
            Text(
                text = orgLabel,
                style = MaterialTheme.typography.labelSmall,
                fontStyle = FontStyle.Italic,
                color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.7f
            )
        }
},

on Text, MaterialTheme.typography and MaterialTheme.colorScheme

But this supporting text param is a Composable Lambda param

supportingText: (@Composable () -> Unit)? = null,

Android Studio also not showing it as an Error in the editor

[youssef hachicha]

deleting the entire project from locale and then clone in it again has always been my solution for this problem

[Vaibhav Jaiswal]

I just changed ?: { } to ?: run { } and it got fixed

[shikasd]

This looks like a compiler bug here, please report to Google tracker :)

[eygraber]

Does it work if you use double brackets, i.e ?: {{ }}

[shikasd]

I think you want to add @Composable before {} to fix it, but it should be inferred by the compiler

[shikasd]

Actually, looking at the snippet again, I am not sure what's the intention here

[Vaibhav Jaiswal]

It was working before upgrading to 2.0
Ill report the bug in Google Issue Tracker

[Vaibhav Jaiswal]

The intention is
Just to show an error text if there is else show a supporting text
Its designed like this because the errorText composable is reused among multiple text fields

[shikasd]

The thing is that this lambda is never executed, it seems like

[Vaibhav Jaiswal]

Couldn't understand
It is executed and is displayed correctly
The error was shown when building

[eygraber]

@shikasd is saying that it's never executed, because it's already in the supportingText lambda. So if errors.organization is null, you're just creating the orgLabel lambda, but never running it.

You probably want this (the same thing you posted but with the outer brackets removed)

supportingText = errors.organisation?.let(::errorText)
         ?: {
             Text(
                 text = orgLabel,
                 style = MaterialTheme.typography.labelSmall,
                 fontStyle = FontStyle.Italic,
                 color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.7f
             )
         }

[Vaibhav Jaiswal]

@eygraber that makes sense
There was no compile time error before but there is now,
That looks like an improvement and not a bug

Thanks for helping out

[Vaibhav Jaiswal]

I added the brackets to make it look readable not knowing that it completely changes what it does