Not 100% sure this is your issue but if you use anything in the indirect object / filehandle argument "slot" to print other than a simple scalar variable (edit: or a plain bareword, of course) you're going to need to wrap it in a block like print { $ads{ $this_ad} } "blah blah";. I'm surprised that it's even parsing and not throwing a syntax error the way you've got it now (samples w/5.32.0 on OS X).
$ perl -MO=Deparse,-p,-q -E 'print $ads{$this_ad} "$line\n";'
String found where operator expected at -e line 1, near "} "$line\n""
(Missing operator before "$line\n"?)
syntax error at -e line 1, near "} "$line\n""
-e had compilation errors.
$ perl -MO=Deparse,-p,-q -E 'print { $ads{$this_ad} } "$line\n";'
use feature 'current_sub', 'bitwise', 'evalbytes', 'fc', 'postderef_qq
+', 'say', 'state', 'switch', 'unicode_strings', 'unicode_eval';
print({$ads{$this_ad};} ($line . "\n"));
-e syntax OK
Afterthought: you also could call the print method on your handle as an alternative: $ads{$this_ad}->print( "blah" )
The cake is a lie.
The cake is a lie.
The cake is a lie.
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