peep.c - add a comment/question to a comment

We optimize away certain nextstate ops, but it isn't clear if
it is possible for the ops to be there to switch hints or feature
flags. Tony thinks its fine however. So I have added the commentary
to the comment for future readers.

1 files changed, 5 insertions, 1 deletions

diff --git a/peep.c b/peep.c
index 0e3a81f019..a743de91d7 100644
--- a/peep.c
+++ b/peep.c
@@ -3032,7 +3032,11 @@ Perl_rpeep(pTHX_ OP *o)
 
             /* Two NEXTSTATEs in a row serve no purpose. Except if they happen
                to carry two labels. For now, take the easier option, and skip
-               this optimisation if the first NEXTSTATE has a label.  */
+               this optimisation if the first NEXTSTATE has a label.
+               Yves asked what about if they have different hints or features?
+               Tony thinks that as we remove the first of the pair it should
+               be fine.
+            */
             if (!CopLABEL((COP*)o) && !PERLDB_NOOPT) {
                 OP *nextop = o->op_next;
                 while (nextop) {