in reply to Re^2: Accessing lexicals in other scopes dynamically by name
in thread Accessing lexicals in other scopes dynamically by name

the point is rather that at run time the variable doesn't exist any more in your example.

Exactly. And the reason it doesn't exist is because it wasn't captured. That would have kept it alive. You can see the capture increasing the ref count in the following snippet: 

$ perl -MDevel::Peek -e'
   sub f {
      my $x;
      Dump($x);
      my @a = map { sub { $x } } 1..3;
      Dump($x);
   }
   f()
'
SV = NULL(0x0) at 0x817bc90
  REFCNT = 1
  FLAGS = (PADMY)
SV = NULL(0x0) at 0x817bc90
  REFCNT = 4
  FLAGS = (PADMY)

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