OtiBlog

I’d surprised when i saw this error updating my servers:

>>> Emerging (1 of 5) perl-core/IO-Compress-2.021
>>> Installing (1 of 5) perl-core/IO-Compress-2.021
>>> Failed to install perl-core/IO-Compress-2.021, Log file:
>>>  '/var/tmp/portage/perl-core/IO-Compress-2.021/temp/build.log'
...

 * This package will overwrite one or more files that may belong to other
 * packages (see list below).
 * perl-core/IO-Compress-Zlib-2.015
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Adapter/Deflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Adapter/Identity.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Deflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Gzip.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Gzip/Constants.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/RawDeflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Zip.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Zip/Constants.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Zlib/Constants.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Zlib/Extra.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Adapter/Identity.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Adapter/Inflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/AnyInflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Gunzip.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Inflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/RawInflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Unzip.pm
 *
 * perl-core/Compress-Zlib-2.015
 * 	/usr/lib/perl5/vendor_perl/5.8.8/Compress/Zlib.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/auto/Compress/Zlib/autosplit.ix
 *
 * perl-core/IO-Compress-Bzip2-2.015
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Adapter/Bzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Bzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Adapter/Bunzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Bunzip2.pm
 *
 * perl-core/IO-Compress-Base-2.015
 * 	/usr/lib/perl5/vendor_perl/5.8.8/File/GlobMapper.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Base.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Base/Common.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/AnyUncompress.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Base.pm
 * Searching all installed packages for file collisions...
 *
 * Press Ctrl-C to Stop
 *  * Detected file collision(s):
 *
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Bunzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Adapter/Bunzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Bzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Adapter/Bzip2.pm
 *
 * Searching all installed packages for file collisions...
 *
 * Press Ctrl-C to Stop
 *
* perl-core/IO-Compress-Zlib-2.015
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Adapter/Deflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Adapter/Identity.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Deflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Gzip.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Gzip/Constants.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/RawDeflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Zip.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Zip/Constants.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Zlib/Constants.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Zlib/Extra.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Adapter/Identity.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Adapter/Inflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/AnyInflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Gunzip.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Inflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/RawInflate.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Unzip.pm
 *
 * perl-core/Compress-Zlib-2.015
 * 	/usr/lib/perl5/vendor_perl/5.8.8/Compress/Zlib.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/auto/Compress/Zlib/autosplit.ix
 *
 * perl-core/IO-Compress-Bzip2-2.015
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Adapter/Bzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Bzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Adapter/Bunzip2.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Bunzip2.pm
 *
 * perl-core/IO-Compress-Base-2.015
 * 	/usr/lib/perl5/vendor_perl/5.8.8/File/GlobMapper.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Base.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Compress/Base/Common.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/AnyUncompress.pm
 * 	/usr/lib/perl5/vendor_perl/5.8.8/IO/Uncompress/Base.pm
 *
 * Package 'perl-core/IO-Compress-2.021' NOT merged due to file
 * collisions. If necessary, refer to your elog messages for the whole
 * content of the above message.

Well, i couldn’t find solution for this error, but bad-practises could be used for this kind of work 

I tried to unmerge IO-Compress-Base, IO-Compress-Bzip2 and IO-Compress-Zlib:

emerge -C IO-Compress-Base IO-Compress-Bzip2 IO-Compress-Zlib

And later, reinstall IO-Compress lib:

emerge -q IO-Compress