public class UpLevel {

    class Inner {

void foo() throws Exception {
final int xx = 12345;

class Local {
Local() { System.out.println("init Local()"); }
Local(int dummy) {
// This line crashes the compiler.
this();
System.out.println("init Local(int)");
}
void baz() throws Exception {
System.out.println(xx);
if (xx != 12345) {
throw new Exception("error");
}
}
}

Local o1 = new Local(1);
Local o2 = new Local();

o1.baz();
o2.baz();
}
    }

    public static void main(String[] args) throws Exception {
UpLevel o1 = new UpLevel();
Inner o2 = o1.new Inner();
o2.foo();
    }

}

Compiling with javac from JDK 1.2beta3 results in a compiler error:

ERROR: sun.tools.java.CompilerError: stack under flow: 12: invokespecial UpLevel. 1$Local(int) = -1
-- listing --
$9:
12: aload 0
12: invokespecial UpLevel. 1$Local(int)
13: getstatic java.io.PrintStream out
13: ldc "init Local(int)"
13: invokevirtual void println(java.lang.String)
10: return
sun.tools.java.CompilerError: stack under flow: 12: invokespecial UpLevel. 1$Local(int) = -1
at sun.tools.asm.Assembler.balance(Assembler.java:246)
at sun.tools.asm.Assembler.write(Assembler.java:378)
at sun.tools.javac.SourceClass.compileClass(SourceClass.java:1969)
at sun.tools.javac.SourceClass.compile(SourceClass.java:1690)
at sun.tools.javac.Main.compile(Main.java:408)
at sun.tools.javac.Main.main(Main.java:571)
error: An error has occurred in the compiler; please file a bug report (http://java.sun.com/cgi-bin/bugreport.cgi).
1 error

william.maddox@Eng 1998-05-05