buildbot failure in MacPorts on buildports-lion-x86_64

[Andrea D'Amore]

On Sun, Nov 4, 2012 at 9:14 PM,  <noreply at macports.org> wrote:
> The Buildbot has detected a failed build on builder buildports-lion-x86_64 while building MacPorts.
> Full details are available at:
>  http://build.macports.org/builders/buildports-lion-x86_64/builds/5656

The port was putting its html doc in $prefix/share/doc thus getting:

DEBUG: Backtrace: Image error: /opt/local/share/doc/index.html already
exists and does not belong to a registered port.  Unable to activate
port fish. Use 'port -f activate fish' to force the activation.

But I wonder where could the existing /opt/local/share/doc/index.html
file be from, any hint?

--
Andrea