DefaultValues macro option ignored by Scala 3 version

[migesok]

Play JSON Version (2.5.x / etc)

2.10.6, 3.0.4, probably any in between

API (Scala / Java / Neither / Both)

Scala

Operating System (Ubuntu 15.10 / MacOS 10.10 / Windows 10)

macOS 14.7.1 M1

JDK (Oracle 1.8.0_72, OpenJDK 1.8.x, Azul Zing)

openjdk version "17.0.5" 2022-10-18
OpenJDK Runtime Environment Temurin-17.0.5+8 (build 17.0.5+8)
OpenJDK 64-Bit Server VM Temurin-17.0.5+8 (build 17.0.5+8, mixed mode)

Library Dependencies

Scala 2.13.6, Scala 3.3.5

Expected Behavior

This should behave the same way on both Scala 2.13 and Scala 3:

import play.api.libs.json.Json

final case class Data(field: Int = 1)

val reads = Json.reads[Data]

println(reads.reads(Json.obj()))

Actual Behavior

On Scala 2:

JsError(List((/field,List(JsonValidationError(List(error.path.missing),List())))))

On Scala 3:

JsSuccess(Data(1),)

Notes

It appears that DefaultValues macro option is disabled by default in the Scala 2 version but not handled at all in the Scala 3 version. At least I haven't found any code touching it the Scala 3 macro.

Such a change in behaviour could lead to unexpected bugs. I noticed it when I tried to introduce Scala 3 cross-compilation in a library and one of the JSON format tests started to fail because it had format.orElse(anotherFormat) and format never failed in Scala 3 version due to different handling of default values.