or download this
use Capture::Tiny 'capture_stderr'; $_=capture_stderr{
use strict; use warnings; use overload; our%D; sub quux { +undef }
+; sub
...
($_,1)for\*STDIN;my$z=\(quux);substr($z,0,1)=quuuux integer=>$$z;q
+uuuux
pack("C",-1)&"\x4B",sub{42};last}quuuuux for 1;%D = {};use Carp;ca
+rp","
};$f=substr($_,0,1),$s=substr($_,1,1),print lc($f eq"'"?$s:$f)for spli
+t/\n/