I think that IO::Uncompress::Gunzip only understands ->binmode() and not ->binmode(':utf8');. The documentation (now that I read it ...) even says:

This is a noop provided for completeness.

If you are able to install PerlIO::gzip, that one should work with stacking other decoding mechanisms on top of it.

If you have a gzip binary available, you can use that to decompress:

my $in;
if( $filename =~ /\.gz$/ ) {
    open $fh, "gzip -cd "$filename" |'
        or die "Can't read from gzip $filename: $!/$?";
} else {
    open $in, '<:raw', $filename or die "Can't read $filename: $!\n";
};
binmode $fh, ':utf8';

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In reply to Re^3: Lost in compressed encodings by Corion
in thread Lost in compressed encodings by Skeeve

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