From: Vincent Pit <perl@profvince.com>
Date: Mon, 9 Nov 2015 17:45:27 +0000 (-0200)
Subject: Fix off-by-one error in su_uplevel_ud->si initialization
X-Git-Tag: rt112246~1
X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2FScope-Upper.git;a=commitdiff_plain;h=da5a83af50b62d200a1255f470a1403a342da901

Fix off-by-one error in su_uplevel_ud->si initialization

si->si_cxmax is the last available context slot, hence should be -1 if we
don't allocate any.
---

diff --git a/Upper.xs b/Upper.xs
index e54c013..f6ed5c6 100644
--- a/Upper.xs
+++ b/Upper.xs
@@ -384,7 +384,7 @@ static su_uplevel_ud *su_uplevel_ud_new(pTHX) {
  si->si_stack   = newAV();
  AvREAL_off(si->si_stack);
  si->si_cxstack = NULL;
- si->si_cxmax   = 0;
+ si->si_cxmax   = -1;
 
  sud->si = si;