Various mro updates from Brandon Black. References:

  <84621a60705111347q40f9dd9ciefa9468e9ff9ca6c@mail.gmail.com>
  <84621a60705121458i34ff361fh9166e8558781df41@mail.gmail.com>
  <84621a60705141111q70ed307r9181dfc2834a8f5c@mail.gmail.com>
  <84621a60705160937h53946fcfg70635908302724e8@mail.gmail.com>

p4raw-id: //depot/perl@31239

1 files changed, 1 insertions, 0 deletions

diff --git a/hv.h b/hv.h
index 67432e9ee4..5600ac3359 100644
--- a/hv.h
+++ b/hv.h
@@ -51,6 +51,7 @@ struct mro_meta {
     AV      *mro_linear_c3;  /* cached c3 @ISA linearization */
     HV      *mro_nextmethod; /* next::method caching */
     U32     cache_gen;       /* Bumping this invalidates our method cache */
+    U32     pkg_gen;         /* Bumps when local methods/@ISA change */
     mro_alg mro_which;       /* which mro alg is in use? */
 };