I have a code like this: <https://pl.kotl.in/5vZUg...

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[koral]

I have a code like this: https://pl.kotl.in/5vZUgXStV
I expect that it will print true . However, ClassCastException: java.lang.Long cannot be cast to DogId is thrown.
Is it a bug in kotlin? Or maybe I’m using inline classes incorrectly?

[Jakub Pi]

Known issue: https://youtrack.jetbrains.com/issue/KT-30716
More information here: https://youtrack.jetbrains.com/issue/KT-30419

[Jakub Pi]

Unless you really need it, just use a data class and trust the compiler to optimise it out. You can always come back to it if your benchmarks show it is on the hotpath