Interesting idea, but it doesn't seem to work. 
tilly@(none):~$ perl -ce 'use strict; *foo->()'
-e syntax OK
tilly@(none):~$ perl -e 'use strict; *foo->()'
Undefined subroutine &main::foo called at -e line 1.

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Tested with Perl 5.8.4.

UPDATE I see, my oversight.

In reply to Re^3: Detect undefined subroutines by tilly
in thread Detect undefined subroutines by Sprad

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