NPE in parser->getDOMImplementation() with CNI

[Mark Wielaard]

On Sun, 2009-06-21 at 16:46 +0100, Andrew Haley wrote:
> Sam Ruby wrote:
> > I'm trying to develop a JAXP implementation using CNI, but I get a
> > NullPointerException when I try to get a DOMImplementation.  I've
> > attached a small script (tested on Ubuntu 9.04) which demonstrates the
> > problem.
> > 
> > Any help would be appreciated.
> 
> Congratulations on this excellent test case.  Next time I want to tell
> people how to do it right, I'll point them at your posting.
> 
> However, I get
> 
>  $ sh ~/testdomimpl.sh
> gnu.xml.dom.DomDocumentBuilderFactory@160ecdad
> gnu.xml.dom.DomDocumentBuilder@15ffbc45
> gnu.xml.dom.DomImpl@15ef0ee5
> 
> gnu.xml.dom.DomDocumentBuilderFactory@2df0bea7
> gnu.xml.dom.DomDocumentBuilder@2de03d5f
> gnu.xml.dom.DomImpl@2dd0bfdf
>  $ gcj --version
> gcj (GCC) 4.4.0 20090307 (Red Hat 4.4.0-0.23)

I get the same with that version of gcj.
But on an older gcj installation:
gcj (Debian 4.3.2-2) 4.3.2

gnu.xml.dom.DomDocumentBuilderFactory@6992f029
gnu.xml.dom.DomDocumentBuilder@647a3539
gnu.xml.dom.DomImpl@64826fa9

gnu.xml.dom.DomDocumentBuilderFactory@17d5dffb
gnu.xml.dom.DomDocumentBuilder@12bcf52b
java.lang.NullPointerException
   at java.io.PrintStream.println(PrintStream.java:473)

That is somewhat strange since that method seems fine:
  public void println (Object obj)
  {
    print(obj == null ? "null" : obj.toString(), true);
  }

So maybe just upgrading to a newer Fedora and gcc 4.4 will be the
solution, although I don't completely get what goes wrong on the old
install.

Cheers,

Mark