scalaJavaAbstractBug

AbstractFoo.scala

package bug

abstract class AbstractFoo {
  def bar: String
}

build.sbt

scalaVersion := "2.12.3"

name := "scalaBug"

Foo.java

package bug;

abstract class Foo extends AbstractFoo {
  String bar = "abc";

  public String baz() {
    return bar();
  }
}

Main.scala

package bug

object Main extends App {
  val f = new Foo() { }
  println(f.baz)
}

sbt-out.txt

[info] Loading project definition from /Users/rgg284/IdeaProjects/scratch/scalaBug/project
[info] Loading settings from build.sbt ...
[info] Set current project to scalaBug (in build file:/Users/rgg284/IdeaProjects/scratch/scalaBug/)
[info] Running bug.Main 
[debug] Waiting for threads to exit or System.exit to be called.
[debug]   Classpath:
[debug] 	/var/folders/68/w07y5fl166xg29544twmpz3rs3h0zr/T/sbt_c7cf7439/job-1/target/73718f77/scalabug_2.12-0.1-SNAPSHOT.jar
[debug] 	/var/folders/68/w07y5fl166xg29544twmpz3rs3h0zr/T/sbt_c7cf7439/target/f2e496f2/scala-library.jar
[debug] Waiting for thread run-main-0 to terminate.
[error] (run-main-0) java.lang.AbstractMethodError: bug.Foo.bar()Ljava/lang/String;
[error] java.lang.AbstractMethodError: bug.Foo.bar()Ljava/lang/String;
[error] 	at bug.Foo.baz(Foo.java:7)
[error] 	at bug.Main$.delayedEndpoint$bug$Main$1(Main.scala:5)
[error] 	at bug.Main$delayedInit$body.apply(Main.scala:3)
[error] 	at scala.Function0.apply$mcV$sp(Function0.scala:34)
[error] 	at scala.Function0.apply$mcV$sp$(Function0.scala:34)
[error] 	at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
[error] 	at scala.App.$anonfun$main$1$adapted(App.scala:76)
[error] 	at scala.collection.immutable.List.foreach(List.scala:389)
[error] 	at scala.App.main(App.scala:76)
[error] 	at scala.App.main$(App.scala:74)
[error] 	at bug.Main$.main(Main.scala:3)
[error] 	at bug.Main.main(Main.scala)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[error] 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] 	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
[error] 	at sbt.Run.invokeMain(Run.scala:89)
[error] 	at sbt.Run.run0(Run.scala:83)
[error] 	at sbt.Run.execute$1(Run.scala:61)
[error] 	at sbt.Run.$anonfun$run$4(Run.scala:73)
[error] 	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
[error] 	at sbt.util.InterfaceUtil$$anon$1.get(InterfaceUtil.scala:10)
[error] 	at sbt.TrapExit$App.run(TrapExit.scala:252)
[error] 	at java.base/java.lang.Thread.run(Thread.java:844)
[error] java.lang.RuntimeException: Nonzero exit code: 1
[error] 	at sbt.Run$.executeTrapExit(Run.scala:120)
[error] 	at sbt.Run.run(Run.scala:73)
[error] 	at sbt.Defaults$.$anonfun$bgRunTask$5(Defaults.scala:1155)
[error] 	at sbt.Defaults$.$anonfun$bgRunTask$5$adapted(Defaults.scala:1150)
[error] 	at sbt.internal.BackgroundThreadPool.$anonfun$run$1(DefaultBackgroundJobService.scala:331)
[error] 	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
[error] 	at scala.util.Try$.apply(Try.scala:209)
[error] 	at sbt.internal.BackgroundThreadPool$BackgroundRunnable.run(DefaultBackgroundJobService.scala:254)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
[error] 	at java.base/java.lang.Thread.run(Thread.java:844)
[error] (compile:run) Nonzero exit code: 1
[error] Total time: 1 s, completed Sep 29, 2017, 11:35:21 AM