SI-7439 ?

readme.md

1. publish-local a
2. compile c

maybe? SI-7439

A.java

// a/src/main/java/A.java

package com.example;

public @interface A{}

B.scala

// b/src/main/scala/B.scala

@com.example.A
class B

build.properties

sbt.version=0.13.0-Beta2

build.sbt

lazy val baseSettings = seq(
  resolvers += Opts.resolver.sonatypeSnapshots,
  scalaVersion := "2.10.2"
)

baseSettings

lazy val a = project.settings(
  organization := "com.example",
  name := "a",
  version := "0.1-SNAPSHOT",
  autoScalaLibrary := false,
  crossPaths := false
).settings(baseSettings: _*)

lazy val b = project.settings(baseSettings: _*).settings(
  libraryDependencies += "com.example" % "a" % "0.1-SNAPSHOT" % "optional"
)

lazy val c = project.dependsOn(b).settings(baseSettings: _*)

C.scala

// c/src/main/scala/C.scala

object C extends App{
  println(new B())
}

error.txt

[info] Compiling 1 Scala source to /Users/user/java-annotation-bug/c/target/scala-2.10/classes...
[warn] Class com.example.A not found - continuing with a stub.
[warn] Caught: java.lang.NullPointerException while parsing annotations in /Users/user/java-annotation-bug/b/target/scala-2.10/classes/B.class
[warn] Caught: java.lang.RuntimeException: bad constant pool index: 0 at pos: 483 while parsing annotations in /Users/user/java-annotation-bug/b/target/scala-2.10/classes/B.class
[error] error while loading B, class file '/Users/user/java-annotation-bug/b/target/scala-2.10/classes/B.class' is broken
[error] (class java.lang.RuntimeException/Scala class file does not contain Scala annotation)
[error] /Users/user/java-annotation-bug/c/src/main/scala/C.scala:3: B does not have a constructor
[error]   println(new B())
[error]           ^
[warn] three warnings found
[error] two errors found
[error] (c/compile:compile) Compilation failed

Here's the output after the fix for SI-7439.

[warn] Class com.example.A not found - continuing with a stub.
[error] error while loading B, Missing dependency 'bad symbolic reference. A signature in B.class refers to term example
[error] in package com which is not available.
[error] It may be completely missing from the current classpath, or the version on
[error] the classpath might be incompatible with the version used when compiling B.class.', required by /Users/jason/code/gist/npe-5849572/b/target/scala-2.10/classes/B.class
[warn] one warning found
[error] one error found
[error] (c/compile:compile) Compilation failed
[error] Total time: 14 s, completed Jun 24, 2013 3:24:27 PM

No mention of the NullPointerException or the bad constant pool index, but something is still forcing the stub symbol. I'll take a further look.

Thanks for the great test case!