bug in perl formline in automake

[Stepan Kasal]

Hello,
"automake --help" contains this:

Files which are automatically distributed, if found:
Use of uninitialized value in formline at /usr/bin/automake line 8334.
  ABOUT-GNU           README              config.rpath ltcf-gcj.sh
  ABOUT-NLS           THANKS              config.sub ltconfig

The error line comes to the terminal through stderr, not stdin.

Does any of the readers here understand perl formlines?

Thanks for any hint,
        Stepan