Restore a comment from 30501 unintentionally deleted with change 31513.

p4raw-id: //depot/perl@31514

diff --git a/mro.c b/mro.c
index c346570..80f11db 100644 (file)
--- a/mro.c
+++ b/mro.c
@@ -146,7 +146,10 @@ Perl_mro_get_linear_isa_dfs(pTHX_ HV *stash, I32 level)
             }
             else {
                 /* otherwise, recurse into ourselves for the MRO
-                   of this @ISA member, and append their MRO to ours */
+                   of this @ISA member, and append their MRO to ours.
+                  The recursive call could throw an exception, which
+                  has memory management implications here, hence the use of
+                  the mortal.  */
                const AV *const subrv
                    = mro_get_linear_isa_dfs(basestash, level + 1);