in reply to More on "IO object version does not match bootstrap parameter" error

I just hit this (with IO, too) - sigh! - so am leaving this one-liner here, for future me: 
for i in $(perl -E 'say for @INC'); do find $i -type d -perm 700 -exec
+ chmod 755 {} \;;done

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In Section Seekers of Perl Wisdom