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Nothing but a newline is printed here (FreeBSD 12.1-STABLE r358002, perl 5.30.3, /bin/sh & zsh) for ...
I get the same output -- 6.81 -- for both of ...
... without any error messages. For me $ENV{ENV} is undefined in both shells; I have not explicitly (un)set it myself. After explicitly making ENV an environment variable for the exercise, error messages are certainly reproducible. So something is stuffing ENV for you and possibly for OP. Wait ... Ah. I see I did set ENV to shell configuration file path in long unused profile for Bourne shell (sh) & in bash{rc,_profile} for bash. In reply to Re^2: Date::Manip and taint mode
by parv
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