sbt stage fails when sbt compile succeeds

[arjundhawan-tomtom]

Expected behaviour

sbt stage should successfully compile a project (involving macros), whenever sbt compile successfully compiles a project.

Actual behaviour

sbt stage fails on compilation, whereas sbt compile succeeds. The problem seems to lie with macros, in particular the zio.macros.accessible annotation (https://zio.dev/docs/howto/howto_macros#description).

I have annotated an object like so:

@accessible
object Foo {

Which is generating the function in the object Foo: Foo.functionA.
When running sbt stage, compilation fails however with error:

[error] /***/Main.scala:54:30: value functionA is not a member of object foo.Foo
[error]   val program = Foo.functionA

Note that sbt compile, or sbt assembly (using the sbt-assembly plugin) work fine.

Information

• What sbt-native-packager are you using: 1.7.4, 1.7.5
• What sbt version: 1.3.10, 1.3.13
• scala version: 2.13.3
• What is your build system: Ubuntu 18.04.5 LTS
• What package are you building: JavaServerAppPackaging

[muuki88]

Hi @arjundhawan-tomtom

Thanks for the detailed description.

This sounds very odd to me. My first intuition this is an issue with the scala docs generation, because

• it is triggered during stage IIRC
• it is not triggered during compile or assembly
• it is a separate scalac instance with different settings

Can you try turning off docs generation? I think this may work

Compile / doc / sources := Seq.empty

Source: https://www.playframework.com/documentation/2.8.x/sbtCookbook

[arjundhawan-tomtom]

@muuki88 wow, great intuition! Indeed it scaladoc is the culprit here. The issue seems to be a 7 years (!) old bug: https://stackoverflow.com/questions/42684101/scaladoc-generation-fails-when-referencing-methods-generated-by-annotation-macro
Sorry for the inconvenience, issue closed.

[muuki88]

This is a bug in Scala, still present in 2.13.

Oh boy 😂 This will never end

Sorry for the inconvenience, issue closed.

No worries 😘