DB<12> use strict;print  @$b
Can't use an undefined value as an ARRAY reference at (eval 39)[/data/data/com.termux/files/usr/lib/perl5/5.28.2/perl5db.pl:738] line 2.

  DB<13> use strict;print  @$b=(1..3)
123
  DB<14> p $b
ARRAY(0xb0a92180)
  DB<15>