Error while upgrading to 1.0.0-stable verison

[LINGA venkatesh]

Hi All,

I am trying to upgrade CameraX version from 1.0.0-rc-04 to 1.0.0-stable and observed below error throughout our repo.

Class 'kotlin.Unit' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.5.1, expected version is 1.1.15.

The class is loaded from /Users/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.5.10/da6a904b132f0402fa4d79169a3c1770598d4702/kotlin-stdlib-1.5.10.jar!/kotlin/Unit.class

I have made only CameraX version change. 

@CameraX team:

Is there a kotlin version upgrade needed? We are at 1.3.41.

Regards,

Venkatesh.

[Scott Nien]

CameraX libraries (camera-core, camera-camera2, camera-lifecycle, camera-view) have no kotlin related dependencies.  We only have kotlin dependencies in the tests which are not included in the artifacts apps are using. 

But I am not an expert on this , maybe I missed something,  I will investigate more on this issue. 

By the way, can you try changing it back to 1.0.0-rc04 again to see if the issue disappears?  

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[Scott Nien]

HI LINGA, 

This might be something wrong in the kotlin plugin.   and there is some suggested solution in https://github.com/flutter/flutter/issues/83834.
It looks like changes ext.kotlin_version = "1.5.10" in build.gradle will fix the issue.   

Scott

[LINGA venkatesh]

By the way, can you try changing it back to 1.0.0-rc04 again to see if the issue disappears?  

Yes, the issue is from the "1.0.0-rc-05" upgrade.

Thanks after upgrading the Kotlin version to 1.5.0 we are unblocked.

Regards,

Venkatesh.