shouldn't

< use feature "say" work?

or shouldn't

< print "huhu" show a message?

UPDATE:

  DB<3> < print "huhu"
  DB<4> 
 
  DB<4> <<
pre-perl commands:
    << -- print "huhu"
  DB<5> h <
< ?            List Perl commands to run before each prompt.
< expr        Define Perl command to run before each prompt.
<< expr        Add to the list of Perl commands to run before each pro
+mpt.
< *                Delete the list of perl commands to run before each
+ prompt.
[download]

Sadly, no, they have their own scope:


  DB<9> < my $f = 42;
  DB<10> x $f
0  undef
  DB<11> << local $g = 15;
  DB<12> x $g 
0  undef
[download]

not a matter of scope...

  DB<32> < $main::a++
  DB<33> print $main::a
5
  DB<34> print $main::a
5
  DB<35> print $main::a
5
[download]

maybe the use is restricted to real debugging (breakpoints and so on ..) and not meant for interactive shells.

Cheers Rolf