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$ perl -wle'
    sub make {
...
'
Use of uninitialized value in print at -e line 9.

$ perl -wle'
    sub make {
...
Variable "$x" is not available at (eval 1) line 2.
Use of uninitialized value in print at -e line 9.

$ perl -wle'
    sub make {
...
    print make(123)->()
'
123