FULL PRODUCT VERSION :
java version "1.6.0_07"
Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
Java HotSpot(TM) Client VM (build 10.0-b23, mixed mode, sharing)

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

A DESCRIPTION OF THE PROBLEM :
javac on
import javax.xml.ws.Holder;

public class testclass
{

   private int CompareN( Holder<Integer> nMatch )
   {
      nMatch.value = 0;
      (nMatch.value)++ ;

return 0;
   }


}

produces
An exception has occurred in the compiler (1.6.0_07). Please file a bug at the Java Developer Connection (http://java.sun.com/webapp
s/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank
 you.
java.lang.AssertionError: (Integer)nMatch.value
        at com.sun.tools.javac.comp.Lower.abstractLval(Lower.java:1873)
        at com.sun.tools.javac.comp.Lower.lowerBoxedPostop(Lower.java:2699)
        at com.sun.tools.javac.comp.Lower.visitUnary(Lower.java:2739)
        at com.sun.tools.javac.tree.JCTree$JCUnary.accept(JCTree.java:1392)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:228)
        at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1074)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:56)
        at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:146)
        at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:2967)
        at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:739)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:130)
        at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2290)
        at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2209)
        at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:639)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2013)
        at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:575)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1921)
        at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3104)
        at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1199)
        at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1118)
        at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:765)
        at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:730)
        at com.sun.tools.javac.main.Main.compile(Main.java:353)
        at com.sun.tools.javac.main.Main.compile(Main.java:279)
        at com.sun.tools.javac.main.Main.compile(Main.java:270)
        at com.sun.tools.javac.Main.compile(Main.java:69)
        at com.sun.tools.javac.Main.main(Main.java:54)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
javac on
import javax.xml.ws.Holder;

public class testclass
{

   private int CompareN( Holder<Integer> nMatch )
   {
      nMatch.value = 0;
      (nMatch.value)++ ;

return 0;
   }


}

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Either an error indicating the problem, or successful compilation.
ACTUAL -
failure above

ERROR MESSAGES/STACK TRACES THAT OCCUR :
An exception has occurred in the compiler (1.6.0_07). Please file a bug at the Java Developer Connection (http://java.sun.com/webapp
s/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank
 you.
java.lang.AssertionError: (Integer)nMatch.value
        at com.sun.tools.javac.comp.Lower.abstractLval(Lower.java:1873)
        at com.sun.tools.javac.comp.Lower.lowerBoxedPostop(Lower.java:2699)
        at com.sun.tools.javac.comp.Lower.visitUnary(Lower.java:2739)
        at com.sun.tools.javac.tree.JCTree$JCUnary.accept(JCTree.java:1392)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:228)
        at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1074)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:56)
        at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:146)
        at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:2967)
        at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:739)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:130)
        at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2290)
        at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2209)
        at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:639)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2013)
        at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:575)
        at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1901)
        at com.sun.tools.javac.comp.Lower.translate(Lower.java:1921)
        at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3104)
        at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1199)
        at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1118)
        at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:765)
        at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:730)
        at com.sun.tools.javac.main.Main.compile(Main.java:353)
        at com.sun.tools.javac.main.Main.compile(Main.java:279)
        at com.sun.tools.javac.main.Main.compile(Main.java:270)
        at com.sun.tools.javac.Main.compile(Main.java:69)
        at com.sun.tools.javac.Main.main(Main.java:54)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class testclass
{

   private int CompareN( Holder<Integer> nMatch )
   {
      nMatch.value = 0;
      (nMatch.value)++ ;

return 0;
   }


}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
change (nMatch.value)++ ;
to nMatch.value = nMatch.value +1 ;