IssueTracker

Component used: Navigation

Version used: 2.4.0-alpha01

Devices/Android versions reproduced on: Huawei P30 pro, os 11.0.0

After updating the navigation to 2.4.0-alpha01 in a project that uses safeArgs the app is crashing at compile time (compileDebugKotlin) with the:

Class 'ActionXtoYFragment' is not abstract and does not implement abstract member public abstract val actionId: Int defined in androidx.navigation.NavDirections

'getActionId' overrides nothing

'getArguments' overrides nothing

The plugin is applied for kotlin:

plugins {
 id 'androidx.navigation.safeargs.kotlin'
}

However, switching to java seems to fix the issue:

plugins {
 id "androidx.navigation.safeargs"
}