The following (incorrect) program:
----------------------------------------------------------------
public class TmpTest {
    public static void main(String[] args) {new ThreadGroup() {};}
}
----------------------------------------------------------------
elicits the following internal error:

/u/martin/ws/ueh/build/solaris-sparc/j2sdk-image/bin/javac -source 1.5 TmpTest.java
TmpTest.java:2: cannot find symbol
symbol : constructor ThreadGroup()
location: class java.lang.ThreadGroup
    public static void main(String[] args) {new ThreadGroup() {};}
                                            ^
TmpTest.java:2: cannot find symbol
symbol : constructor ThreadGroup()
location: class java.lang.ThreadGroup
    public static void main(String[] args) {new ThreadGroup() {};}
                                                              ^
An exception has occurred in the compiler (1.5.0-internal). Please file a bug at the Java Developer Connection (http://java.sun.com/cgi-bin/bugreport.cgi) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.AssertionError
at com.sun.tools.javac.comp.Attr.visitNewClass(Attr.java:1331)
at com.sun.tools.javac.tree.Tree$NewClass.accept(Tree.java:840)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:256)
at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:278)
at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:865)
at com.sun.tools.javac.tree.Tree$Exec.accept(Tree.java:734)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:256)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:291)
at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:307)
at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:572)
at com.sun.tools.javac.tree.Tree$Block.accept(Tree.java:540)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:256)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:291)
at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:510)
at com.sun.tools.javac.tree.Tree$MethodDef.accept(Tree.java:482)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:256)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:291)
at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:2337)
at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2270)
at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2221)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:410)
at com.sun.tools.javac.main.Main.compile(Main.java:586)
at com.sun.tools.javac.main.Main.compile(Main.java:538)
at com.sun.tools.javac.Main.compile(Main.java:44)
at com.sun.tools.javac.Main.main(Main.java:35)

Surprisingly, when run out of a developer's build tree, it acts differently,
and more reasonably:

/u/martin/ws/ueh/build/solaris-sparc/bin/javac -source 1.5 TmpTest.java
TmpTest.java:2: cannot find symbol
symbol : constructor ThreadGroup()
location: class java.lang.ThreadGroup
    public static void main(String[] args) {new ThreadGroup() {};}
                                            ^
TmpTest.java:2: cannot find symbol
symbol : constructor ThreadGroup()
location: class java.lang.ThreadGroup
    public static void main(String[] args) {new ThreadGroup() {};}
                                                              ^
2 errors

###@###.### 2004-03-06