It's also worth noting that B::Deparse can't always be trusted.

The clause of the if has the same scope like the inner block ( with if (CLAUSE) {BLOCK} )

  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 d
+eclare "my $x"?) at (eval 13)[C:/Perl_524/lib/perl5db.pl:737] line 2.

  DB<5>
[download]

but Deparse fails to cover this with -x7

>>perl -MO=Deparse,-x7 -e"if (my $x =1) { print $x }; print $x"
my $x = 1 and do {
    print $x
};
print $x;                      # <-- no error under strict!
-e syntax OK
[download]