ScalaDoc for Scala 3 breaks multi-module build #18732
Description
Expected Behavior
$ ./gradlew scaladoc should work even if Scala 3 is used and even if the project has multiple subprojects.
Current Behavior
ScalaDoc is not generated; build fails.
Steps to Reproduce
$ git clone https://github.com/opentorah/opentorah.git
...
$ cd opentorah
$ ./gradlew scaladoc
...
> Task :opentorah-calendar:scaladoc
-- Error: ... undefined ... at readTasty ... cannot take signature of MethodType(...) ...
the classfile defining the type might be missing from the classpath while compiling ...
> Task :opentorah-calendar:scaladoc FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':opentorah-calendar:scaladoc'.
> A failure occurred while executing org.gradle.api.tasks.scala.internal.GenerateScaladoc
> Could not generate scaladoc
Your Environment
Scala: 3.1.1-RC1
Gradle: 7.3-rc-1