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knownDirectSubclasses of <class> observed before subclass <class> registered

See original GitHub issue

In: https://github.com/joan38/orchestra/tree/6d2c170f37040f2179479c6126292e030808ed08

Just rename: orchestra/src/main/scala/com/goyeau/orchestra/ARunStatus.scala to: orchestra/src/main/scala/com/goyeau/orchestra/RunStatus.scala

And enjoy:

[error] knownDirectSubclasses of RunStatus observed before subclass Running registered
[error] knownDirectSubclasses of RunStatus observed before subclass Success registered
[error] two errors found
[error] (orchestraJVM/compile:compileIncremental) Compilation failed

Using: Scala 2.12.2 Circe 0.8.0

Issue Analytics

State:
Created 6 years ago
Comments:9 (9 by maintainers)

Top GitHub Comments

3reactions

ngbinhcommented, May 22, 2017

@lloydmeta @joan38 putting the extending classes and objects inside the companion object of the sealed trait will cause knownDirectSubclasses (sometimes can be intermittently due to incremental compiling).

2reactions

ngbinhcommented, May 22, 2017

right after upgrading to 2.12.0 (which contains this https://github.com/scala/scala/pull/5284 ), we’ve seen a lot more cases of knownDirectSubclasses in incremental compile. Move the direct subclasses outside of the sealed trait companion object definitely help in our case. But #434 looks scary! 😦

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