DB<3> use strict; my $x=3; if (my $x =1) { print $x }
1
  DB<4> use strict; if (my $x =1) { print $x }; print $x
Global symbol "$x" requires explicit package name (did you forget to declare "my $x"?) at (eval 13)[C:/Perl_524/lib/perl5db.pl:737] line 2.

  DB<5>