Enter exception message into perldiag

Author: jkeenan

pod/perldiag.pod

@@ -7845,6 +7845,10 @@ For speed and efficiency reasons, Perl internally does not do full
 reference-counting of iterated items, hence deleting such an item in the
 middle of an iteration causes Perl to see a freed value.
 
+=item Use of goto to jump into a construct is no longer permitted
+
+(F) More TO COME.
+
 =item Use of /g modifier is meaningless in split
 
 (W regexp) You used the /g modifier on the pattern for a C<split>