Yitzchak points out that the perldiag entry for "Integer overflow in

[perl5.git] / pod / perliol.pod

diff --git a/pod/perliol.pod b/pod/perliol.pod
index 466959b..26ad305 100644 (file)
--- a/pod/perliol.pod
+++ b/pod/perliol.pod
@@ -559,6 +559,10 @@ pushed. e.g. ":encoding(ascii)" would return an SvPV with value
 "ascii". (I<param> and I<flags> arguments can be ignored in most
 cases)
 
+C<Dup> uses C<Getarg> to retrieve the argument originally passed to
+C<Pushed>, so you must implement this function if your layer has an
+extra argument to C<Pushed> and will ever be C<Dup>ed.
+
 =item Fileno
 
        IV        (*Fileno)(pTHX_ PerlIO *f);