1 files changed, 2 insertions, 0 deletions
diff --git a/hv.c b/hv.c
index 477b11ef4b..89c6456185 100644
--- a/hv.c
+++ b/hv.c
@@ -2972,6 +2972,8 @@ Perl_refcounted_he_free(pTHX_ struct refcounted_he *he) {
     }
 }
 
+/* pp_entereval is aware that labels are stored with a key ':' at the top of
+   the linked list.  */
 const char *
 Perl_fetch_cop_label(pTHX_ struct refcounted_he *const chain, STRLEN *len,
 		     U32 *flags) {