[perl] Experimental keys on scalar is now forbidden 的問題解決
出錯提示為：
# Experimental keys on scalar is now forbidden at /xxx/.cpanm/work/1468479049.21281/....../blib/script/convert line 106.
$perl -v
This is perl 5, version 24, subversion 0 (v5.24.0) built for x86_64-linux
(with 1 registered patch, see perl -V for more detail)
解決方法：
printf( "read \%i entries\n", int keys $entries );
修改為
printf( "read \%i entries\n", int keys %$entries );
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