This crash is reproducible with the following test case:
------------------------------------------------
import java.awt.*;

public class Test {
    public static void main(String[] args) {
        final Frame f = new Frame();
        final FileDialog fd = new FileDialog(f);
        fd.setVisible(true);
    }
}
------------------------------------------------
Run the test case. A FileDialog will appear. Press 'Cancel' button in
the FileDialog. The app will crash. I investigated the crash with the
debug build of the current merlin workspace on Intel/Solaris 2.7.


Reproducible on Merlin b72.