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{ #outer scope
  $lamb = lambda ( $x, $y, $z ) => sub { $x + $y }
}

my( $x, $y, $z ) = ( 1,2,3 );
my $lamb = do{
    my( $x, $y, $z ) = ( $x, $y, $z );
    lambda ( $x, $y, $z ) => sub { $x + $y }
}