Why is the compiler asking me for an `else` branch when I have covered all of the possible subclasse...

# getting-started

[Arnab]

Why is the compiler asking me for an else branch when I have covered all of the possible subclasses of Foo (sealed class) ? Was it always like this? I remember not having to implement an else branch before.

[Rahul Rawat]

No it wasn’t recently I faced the same with enums as well

[Arnab]

Apparently: https://youtrack.jetbrains.com/issue/KT-50421

[Klitos Kyriacou]

Your code sample compiles and runs just fine.

[Arnab]

You can see in my screenshot that it doesn’t.

[Klitos Kyriacou]

What version of Kotlin are you using? The code works in both 1.5.31, 1.6.0 and 1.6.10.
Also, you can see it working here: https://pl.kotl.in/ELzXUsA6I