More stuff for issue #1472

This should make it closable.

doc/Language/traps.pod6

@@ -804,6 +804,18 @@ programmatically generated output, and
 L«C<Str.lines>|/type/Str#method_lines» when working with user-written
 texts.
 
+Use C<$data.split(“\n”)> in all cases where the original L<IO::Handle>
+is not available.
+
+=comment RT #131923
+
+If you are using L<Proc::Async>, then there is currently no easy way
+to make it split data the right way. You can try reading the whole
+output and then using L«C<Str.split>|/type/Str#method_split» (not viable
+if you are dealing with large data) or writing your own logic to split
+the incoming data the way you need. Same applies if your data
+is null-separated.
+
 =head1 Exception Handling
 
 =head2 Sunk C<Proc>