StubSymbol for annotations absent from the classpath became crasier in 2.10.4

[scabug]

scala-hash v2.10.4 -deprecation -nc -classpath /Users/jason/.ivy2/cache/org.reflections/reflections/jars/reflections-0.9.8.jar:action/jta/jars/jta-1.1.jar:/Users/jason/.ivy2/cache/com.jolbox/bonecp/bundles/bonecp-0.7.1.RELEASE.jar:/Users/jason/.ivy2/cache/com.google.guava/guava/bundles/guava-14.0.1.jar
Welcome to Scala version 2.10.4-20140209-180020-b66a39653b (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_65).
Type in expressions to have them evaluated.
Type :help for more information.

scala> new org.reflections.Store().get(null)
...
uncaught exception during compilation: java.lang.AssertionError
java.lang.AssertionError: assertion failed: javax.annotation.Nullable
	at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1212)
	at scala.reflect.internal.Symbols$TypeSymbol.isNonBottomSubClass(Symbols.scala:2821)
	at scala.reflect.internal.AnnotationInfos$AnnotationInfo.matches(AnnotationInfos.scala:295)
	at scala.reflect.internal.AnnotationInfos$Annotatable$class.dropOtherAnnotations(AnnotationInfos.scala:65)
	at scala.reflect.internal.AnnotationInfos$Annotatable$class.hasAnnotation(AnnotationInfos.scala:50)
	at scala.reflect.internal.Symbols$Symbol.hasAnnotation(Symbols.scala:112)
	at scala.reflect.internal.Symbols$Symbol.isDeprecated(Symbols.scala:723)

% scala-hash v2.11.0-RC3 -deprecation -nc -classpath /Users/jason/.ivy2/cache/org.reflections/reflections/jars/reflections-0.9.8.jar:action/jta/jars/jta-1.1.jar:/Users/jason/.ivy2/cache/com.jolbox/bonecp/bundles/bonecp-0.7.1.RELEASE.jar:/Users/jason/.ivy2/cache/com.google.guava/guava/bundles/guava-14.0.1.jar
Welcome to Scala version 2.11.0-20140318-174310-bcf24ec9ba (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_65).
Type in expressions to have them evaluated.
Type :help for more information.

scala> (s: org.reflections.Store) => s.get(null)
warning: Class javax.annotation.Nullable not found - continuing with a stub.
java.lang.AssertionError: assertion failed: javax.annotation.Nullable
	at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1410)
	at scala.reflect.internal.Symbols$TypeSymbol.isNonBottomSubClass(Symbols.scala:3040)
	at scala.reflect.internal.AnnotationInfos$AnnotationInfo.matches(AnnotationInfos.scala:305)
	at scala.reflect.internal.AnnotationInfos$Annotatable$class.dropOtherAnnotations(AnnotationInfos.scala:68)
	at scala.reflect.internal.AnnotationInfos$Annotatable$class.hasAnnotation(AnnotationInfos.scala:53)
	at scala.reflect.internal.Symbols$Symbol.hasAnnotation(Symbols.scala:174)
	at scala.tools.nsc.typechecker.Infer$class.improves$1(Infer.scala:61)

Adding the Nullable annotation to the compiler's classpath works around the crash:

scala-hash v2.11.0-RC3 -deprecation -nc -classpath /Users/jason/.ivy2/cache/org.reflections/reflections/jars/reflections-0.9.8.jar:action/jta/jars/jta-1.1.jar:/Users/jason/.ivy2/cache/com.jolbox/bonecp/bundles/bonecp-0.7.1.RELEASE.jar:/Users/jason/.ivy2/cache/com.google.guava/guava/bundles/guava-14.0.1.jar:/Users/jason/.ivy2/cache/com.google.code.findbugs/jsr305/jars/jsr305-2.0.1.jar
Welcome to Scala version 2.11.0-20140318-174310-bcf24ec9ba (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_65).
Type in expressions to have them evaluated.
Type :help for more information.

scala> (s: org.reflections.Store) => s.get(null)
res0: org.reflections.Store => com.google.common.collect.Multimap[String,String] = <function1>

Where Store.get is defined as:

    /** return the multimap store of the given scanner class. not immutable */
    @Nullable public Multimap<String, String> get(Class<? extends Scanner> scannerClass) {
        return storeMap.get(scannerClass.getSimpleName());
    }

Regressed in 2.10.4, specifically in scala/scala@8d74fa024262

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-8442?orig=1
Reporter: @retronym
Affected Versions: 2.10.4, 2.11.0-RC3
Other Milestones: 2.11.1
See #7439

[scabug]

@retronym said (edited on Mar 25, 2014 12:53:50 PM UTC):
Here's a standalone test case:

% tail test/files/run/t8442/*
==> test/files/run/t8442/A_1.java <==
@java.lang.annotation.Retention(java.lang.annotation.RetentionPolicy.RUNTIME)
public @interface A_1 {

}
==> test/files/run/t8442/B_1.java <==
public class B_1 {
	@A_1 public String get() { return ""; }
}

==> test/files/run/t8442/C_2.scala <==
class C_2 {
  def foo(b: B_1) {
    b.get()
  }
}

% javac -d /tmp test/files/run/t8442/{A,B}_1.java &&  qbin/scalac -classpath /tmp -d /tmp test/files/run/t8442/C_2.scala && (rm /tmp/A_1.class; true) && qbin/scalac -classpath /tmp -d /tmp test/files/run/t8442/C_2.scala
warning: Class A_1 not found - continuing with a stub.
...
uncaught exception during compilation: java.lang.AssertionError
error: java.lang.AssertionError: assertion failed: A_1
	at scala.Predef$.assert(Predef.scala:179)
	at scala.reflect.internal.Symbols$Symbol.info(Symbols.scala:1212)
	at scala.reflect.internal.Symbols$TypeSymbol.isNonBottomSubClass(Symbols.scala:2821)
	at scala.reflect.internal.AnnotationInfos$AnnotationInfo.matches(AnnotationInfos.scala:295)
	at scala.reflect.internal.AnnotationInfos$Annotatable$class.dropOtherAnnotations(AnnotationInfos.scala:65)
	at scala.reflect.internal.AnnotationInfos$Annotatable$class.hasAnnotation(AnnotationInfos.scala:50)
	at scala.reflect.internal.Symbols$Symbol.hasAnnotation(Symbols.scala:112)
	at scala.reflect.internal.Symbols$Symbol.isDeprecated(Symbols.scala:723)

[scabug]

@retronym said:
scala/scala#3655