Sorry, can't reproduce on Linux / v5.20 / IO::All v0.85. So I'll just throw out a couple more debugging guesses...

If you replace my $io = io $0; with my $io = [qw/foo bar/]; (and perhaps drop the use IO::All;) I hope it works?

Have you tried opening something other than $0?

In reply to Re^3: Why doesn't this print when i omit the newline? by Anonymous Monk
in thread Why doesn't this print when i omit the newline? by karlgoethebier

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