-- (gcd.pl:18)
die sprintf "Need two integer arguments, got %d", scalar(@ARGV) unless 
*** You must alias to a command name, and 'foo' isn't one.
New alias 'yy' for command string 'step' created.
New alias 'evd' for command string 'set evaldisplay' created.
Eval result display style is dumper.
evd: set evaldisplay
*** Command 'set evaldisplay' needs at least 1 argument(s); got 0.
Eval result display style is dumper.
Alias 'evd' for command string 'set evaldisplay dumper' replaced old alias for 'set evaldisplay'.