El Pragma strict y el Referenciado Simbólico

El pragma strict impide el uso de referencias simbólicas:

$ cat symbol_ref.pl
#!/usr/bin/perl -w

use strict;

our $x = 4;
my $a = "x";
$$a = 10;

print $x;
$ ./symbol_ref.pl
Can't use string ("x") as a SCALAR ref while "strict refs" in use at ./symbol_ref.pl line 7.