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    Debugging regular expressions

       There are two ways to enable debugging output for regular
...
       scoped).

       [snip; read the details in the perldebug documentation.]

#!perl -c
use re 'debug';

...
/(?:a|b|c|d|e|f|gt)t/;

__END__

/at/||/bt/||/ct/||/dt/||/et/||/ft/||/ght/;

compiling RE `at'
...
  25: END(0)
minlen 2