ClassCastException in com.sun.tools.javac.comp.Annotate.enterAttributeValue

FULL PRODUCT VERSION :
java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
Java HotSpot(TM) Client VM (build 16.3-b01, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
init.typedefs:
 
init:
 
build:
      [apt] [web.content.root]|[/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/WebContent]
      [apt] [web.source.roots]|[/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/src]
      [apt] Compiling 1 source file to /apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/build/classes
      [apt] An exception has occurred in apt (1.6.0_05). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
      [apt] java.lang.ClassCastException: com.sun.tools.javac.tree.JCTree$JCErroneous
      [apt] at com.sun.tools.javac.comp.Annotate.enterAttributeValue(Annotate.java:205)
      [apt] at com.sun.tools.javac.comp.Annotate.enterAttributeValue(Annotate.java:219)
      [apt] at com.sun.tools.javac.comp.Annotate.enterAnnotation(Annotate.java:167)
      [apt] at com.sun.tools.javac.comp.MemberEnter.enterAnnotations(MemberEnter.java:743)
      [apt] at com.sun.tools.javac.comp.MemberEnter.access$300(MemberEnter.java:42)
      [apt] at com.sun.tools.javac.comp.MemberEnter$5.enterAnnotation(MemberEnter.java:711)
      [apt] at com.sun.tools.javac.comp.Annotate.flush(Annotate.java:95)
      [apt] at com.sun.tools.javac.comp.Annotate.enterDone(Annotate.java:87)
      [apt] at com.sun.tools.javac.comp.Enter.complete(Enter.java:472)
      [apt] at com.sun.tools.javac.comp.Enter.main(Enter.java:429)
      [apt] at com.sun.tools.apt.main.JavaCompiler.compile(JavaCompiler.java:250)
      [apt] at com.sun.tools.apt.main.Main.compile(Main.java:1102)
      [apt] at com.sun.tools.apt.main.Main.compile(Main.java:964)
      [apt] at com.sun.tools.apt.Main.processing(Main.java:95)
      [apt] at com.sun.tools.apt.Main.process(Main.java:43)
      [apt] at com.sun.tools.apt.Main.main(Main.java:34)
 
BUILD FAILED
/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildApp/build.xml:88: The following error occurred while executing this line:
jar:file:/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/workshop-lib/workshop-antlib.jar!/com/bea/workshop/cmdline/antlib/antlib.xml:115: The following error occurred while executing this line:
/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildApp/build.xml:98: The following error occurred while executing this line:
/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/build.xml:103: The following error occurred while executing this line:
jar:file:/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/workshop-lib/workshop-antlib.jar!/com/bea/workshop/cmdline/antlib/antlib.xml:54: The following error occurred while executing this line:
/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/build.xml:127: Compile failed; see the compiler error output for details.



ERROR MESSAGES/STACK TRACES THAT OCCUR :
init.typedefs:
 
init:
 
build:
      [apt] [web.content.root]|[/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/WebContent]
      [apt] [web.source.roots]|[/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/src]
      [apt] Compiling 1 source file to /apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/build/classes
      [apt] An exception has occurred in apt (1.6.0_05). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
      [apt] java.lang.ClassCastException: com.sun.tools.javac.tree.JCTree$JCErroneous
      [apt] at com.sun.tools.javac.comp.Annotate.enterAttributeValue(Annotate.java:205)
      [apt] at com.sun.tools.javac.comp.Annotate.enterAttributeValue(Annotate.java:219)
      [apt] at com.sun.tools.javac.comp.Annotate.enterAnnotation(Annotate.java:167)
      [apt] at com.sun.tools.javac.comp.MemberEnter.enterAnnotations(MemberEnter.java:743)
      [apt] at com.sun.tools.javac.comp.MemberEnter.access$300(MemberEnter.java:42)
      [apt] at com.sun.tools.javac.comp.MemberEnter$5.enterAnnotation(MemberEnter.java:711)
      [apt] at com.sun.tools.javac.comp.Annotate.flush(Annotate.java:95)
      [apt] at com.sun.tools.javac.comp.Annotate.enterDone(Annotate.java:87)
      [apt] at com.sun.tools.javac.comp.Enter.complete(Enter.java:472)
      [apt] at com.sun.tools.javac.comp.Enter.main(Enter.java:429)
      [apt] at com.sun.tools.apt.main.JavaCompiler.compile(JavaCompiler.java:250)
      [apt] at com.sun.tools.apt.main.Main.compile(Main.java:1102)
      [apt] at com.sun.tools.apt.main.Main.compile(Main.java:964)
      [apt] at com.sun.tools.apt.Main.processing(Main.java:95)
      [apt] at com.sun.tools.apt.Main.process(Main.java:43)
      [apt] at com.sun.tools.apt.Main.main(Main.java:34)
 
BUILD FAILED
/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildApp/build.xml:88: The following error occurred while executing this line:
jar:file:/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/workshop-lib/workshop-antlib.jar!/com/bea/workshop/cmdline/antlib/antlib.xml:115: The following error occurred while executing this line:
/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildApp/build.xml:98: The following error occurred while executing this line:
/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/build.xml:103: The following error occurred while executing this line:
jar:file:/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/workshop-lib/workshop-antlib.jar!/com/bea/workshop/cmdline/antlib/antlib.xml:54: The following error occurred while executing this line:
/apps/opt/vbuild/code/rashmi/Workshop_10/vbuild/vbuildWeb/build.xml:127: Compile failed; see the compiler error output for details.


REPRODUCIBILITY :
This bug can be reproduced always.

SUPPORT :
YES