Compiler bug

[Geoffrey Falk]

This code should not compile:

class CompilerBug {
 
  public static void main(String[] args) {
    final int x;
    while(true) {
      if (true) {
        break;
      }
      x = 1;
    }
    System.out.println(x);
  }
}

bash% java CompilerBug
Exception in thread "main" java.lang.VerifyError: (class: CompilerBug, method: main signature: ([Ljava/lang/String :wink: V) Accessing value from uninitialized register 1

[Christopher McCauley]

agreed, Is this a question?

[Ernest Friedman-Hill]

That's a bug, all right. Both the JDK 1.4.2 and 1.5 compilers accept this code. Jikes rejects it, however, as does Eclipse's built-in compiler. You ought to report it.

[Geoffrey Falk]

I have reported it.

Thanks