# perl -lwE'for (reverse 0..2) {
   our $foo;
   local *foo;
   $foo=$_ if $_==1;
   print $foo // "undef";
 }'

undef
1
undef
[download]

# perl -lwE'for (reverse 0..2) {
   our $foo;
#  local *foo;
   $foo=$_ if $_==1;
   print $foo // "undef";
 }'

undef
1
1
[download]