The debugger and "use feature" are not playing together nicely in 5.14. Is there some special incantation needed? 
  perl -de 0

Loading DB routines from perl5db.pl version 1.33
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

main::(-e:1):    0
                                                                      
+            DB<1> use feature 'say'

                                                                      
+            DB<2> say "Goodnight, Gracie"
String found where operator expected at (eval 26)[/honk/perl5.14.0/lib
+/5.14.0/perl5db.pl:640] line 2, near "say "Goodnight, Gracie""
 at (eval 26)[/honk/perl5.14.0/lib/5.14.0/perl5db.pl:640] line 2
    eval '($@, $!, $^E, $,, $/, $\\, $^W) = @saved;package main; $^D =
+ $^D | $DB::db_stop;
say "Goodnight, Gracie";

;' called at /honk/perl5.14.0/lib/5.14.0/perl5db.pl line 640
    DB::eval called at /honk/perl5.14.0/lib/5.14.0/perl5db.pl line 343
+6
    DB::DB called at -e line 1
    (Do you need to predeclare say?)
 at (eval 26)[/honk/perl5.14.0/lib/5.14.0/perl5db.pl:640] line 2
    eval '($@, $!, $^E, $,, $/, $\\, $^W) = @saved;package main; $^D =
+ $^D | $DB::db_stop;
say "Goodnight, Gracie";

;' called at /honk/perl5.14.0/lib/5.14.0/perl5db.pl line 640
    DB::eval called at /honk/perl5.14.0/lib/5.14.0/perl5db.pl line 343
+6
    DB::DB called at -e line 1
syntax error at (eval 26)[/honk/perl5.14.0/lib/5.14.0/perl5db.pl:640] 
+line 2, near "say "Goodnight, Gracie""

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In reply to debugger versus say in 5.14 by jpl

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