:new: :kotlinnew: Hi everyone! Kotlin 1.5.30 has b...

# announcements

[Alina Dolgikh [JB]]

🆕 K
Hi everyone! Kotlin 1.5.30 has been released.

It includes:
• Sealed when statements
• Support for suspend functions as supertypes
• JS IR compiler in Beta
• Native support for Apple silicon
• And more
Learn more in the blog post.

[serebit]

This release appears to contain backwards-incompatible changes to Kotlin syntax checking and compiler analysis (namely sealed when statements). Why release this change now, rather than in Kotlin 1.6?

[Zac Sweers]

per the docs linked in the post - only if you enable the -progressive flag, which is exactly why they added that flag for early adopters

[serebit]

Gotcha. That makes me feel better.

[Johnjake Talledo]

can someone enlighten me on why do I need to extend my class to suspend -> Unit() ? Thanks

[aidanvii]

Another new feature of 1.5.30 is the ability to return an inline value class from a suspend function that has default parameters without weird class cast exceptions at runtime. This issue stung me quite badly for a week after migrating to Result as a return type. https://youtrack.jetbrains.com/issue/KT-47206