FULL PRODUCT VERSION :
java version "1.7.0_04-ea"
Java(TM) SE Runtime Environment (build 1.7.0_04-ea-b06)
Java HotSpot(TM) Server VM (build 23.0-b09, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux 2.3.5

A DESCRIPTION OF THE PROBLEM :
When compiling OpenJDK8 with jdk7, I got the following Exception:

make[4]: Entering directory `/home/ce/jdk/make/mkdemo/applets/ArcTest'
/bin/mkdir -p ../../../../build/linux-i586/democlasses/demo/applets/ArcTest/jar_image
/opt/Programme/jdk7/bin/javac -J-XX:ThreadStackSize=768 -J-XX:-PrintVMOptions -J-XX:+UnlockDiagnosticVMOptions -J-XX:-LogVMOutput -J-client -J-Xmx512m -J-Xms512m -J-XX:PermSize=32m -J-XX:MaxPermSize=160m -Xlint:-path -source 7 -target 7 -encoding ascii "-Xbootclasspath:../../../../build/linux-i586/classes" -d ../../../../build/linux-i586/democlasses/demo/applets/ArcTest/jar_image -sourcepath ../../../../build/linux-i586/democlasses/demo/applets/ArcTest/src @../../../../build/linux-i586/democlasses/demo/applets/ArcTest/javac_input.txt
An exception has occurred in the compiler (1.7.0_04-ea). 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.
java.lang.NullPointerException
at com.sun.tools.javac.code.Type$ClassType.isErroneous(Type.java:678)
at com.sun.tools.javac.code.Symbol.isInheritedIn(Symbol.java:383)
at com.sun.tools.javac.code.Symbol.isMemberOf(Symbol.java:323)
at com.sun.tools.javac.comp.TransTypes.addBridgeIfNeeded(TransTypes.java:282)
at com.sun.tools.javac.comp.TransTypes.addBridges(TransTypes.java:389)
at com.sun.tools.javac.comp.TransTypes.addBridges(TransTypes.java:403)
at com.sun.tools.javac.comp.TransTypes.translateClass(TransTypes.java:878)
at com.sun.tools.javac.comp.TransTypes.visitClassDef(TransTypes.java:446)
at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:591)
at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:425)
at com.sun.tools.javac.comp.TransTypes.translateTopLevelClass(TransTypes.java:898)
at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1375)
at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1271)
at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:870)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:829)
at com.sun.tools.javac.main.Main.compile(Main.java:419)
at com.sun.tools.javac.main.Main.compile(Main.java:333)
at com.sun.tools.javac.main.Main.compile(Main.java:324)
at com.sun.tools.javac.Main.compile(Main.java:76)
at com.sun.tools.javac.Main.main(Main.java:61)



REPRODUCIBILITY :
This bug can be reproduced often.