Announcing Scala 3.0.0-M3: developer's preview before RC1

We are happy to announce the release of Scala 3.0.0-M3. This release is intended to contain all the features meant for RC1 which is tentatively planned for January 2021. The purpose of M3 is to give the community a chance to try out all the features and give us feedback before sealing them in RC1. In this release, we had a bunch of final syntactic polishings. We have also tied up the remaining loose ends so that the only thing to do before the RC1 and 3.0.0 stable releases is to collect feedback and properly address it.

You can read more about the M3 release in the blog article:


There’s a little issue : it says Matchable does not have any method but it has getClass and isInstanceOf.

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