When I try to compile this:

public class TestEnum
{
  private static String[] numerals =
      {"einz", "zwei", "drei", "vier"};
 
  static
  {
    for (String n : numerals)
    {
      // doesn't matter what's in here
    }
  }
 
  public static void main(String[] args)
  {
  }
}

I get this exception:

An exception has occurred in the compiler (1.4.2-beta).
java.lang.NullPointerException
    at com.sun.tools.javac.comp.Lower.visitArrayForeachLoop(Lower.java:2269)
    at com.sun.tools.javac.comp.Lower.visitForeachLoop(Lower.java:2242)
    at com.sun.tools.javac.tree.Tree$ForeachLoop.accept(Tree.java:559)
    at com.sun.tools.javac.comp.Lower.translate(Lower.java:1580)
    at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:51)
    at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:131)
    at com.sun.tools.javac.tree.Tree$Block.accept(Tree.java:497)
    at com.sun.tools.javac.comp.Lower.translate(Lower.java:1580)
    at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:1645)
    at com.sun.tools.javac.tree.Tree$ClassDef.accept(Tree.java:409)
    at com.sun.tools.javac.comp.Lower.translate(Lower.java:1580)
    at com.sun.tools.javac.comp.Lower.translate(Lower.java:1594)
    at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:2438)
    at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:408)
    at com.sun.tools.javac.main.Main.compile(Main.java:523)
    at com.sun.tools.javac.Main.compile(Main.java:41)
    at com.sun.tools.javac.Main.main(Main.java:32)

The same thing happens if I use foreach with a Collection instead an array. If I use an old-style for loop or Iterator in the static block, it compiles fine. I can also put the foreach loop in the main method, and it works. Is this a known bug?

 

 

You guys rock. Thanks for finding this problem. I'll get it fixed.