From d9c5ee320c798b3c8d4af2c0e5f180f41d3894a1 Mon Sep 17 00:00:00 2001
From: Camm Maguire <camm@debian.org>
Date: Thu, 11 Aug 2022 18:16:42 +0100
Subject: [PATCH] <short summary of the patch>

TODO: Put a short summary on the line above and replace this paragraph
with a longer explanation of this change. Complete the meta-information
with other relevant fields (see below for details). To make it easier, the
information below has been extracted from the changelog. Adjust it or drop
it.

gcl (2.6.12-85) unstable; urgency=medium

  * Version_2_6_13pre81

Gbp-Pq: Name Version_2_6_13pre82
---
 o/alloc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/o/alloc.c b/o/alloc.c
index f8470e6..0343ab7 100644
--- a/o/alloc.c
+++ b/o/alloc.c
@@ -349,9 +349,10 @@ resize_hole(ufixnum hp,enum type tp,bool in_placep) {
   char *start=rb_begin(),*new_start=heap_end+hp*PAGESIZE;
   ufixnum size=rb_pointer-start;
 
+#define OVERLAP(c_,t_,s_) ((t_)<(c_)+(s_) && (c_)<(t_)+(s_))
   if (!in_placep && (rb_high() ?
-		     new_start+size>rb_end :
-		     new_start+(nrbpage<<PAGEWIDTH)<start+size
+		     OVERLAP(start,new_start,size) :
+		     OVERLAP(start,new_start+(nrbpage<<PAGEWIDTH),size)
 		     /* 0 (20190401  never reached)*/
 		     )) {
     if (sSAnotify_gbcA->s.s_dbind != Cnil)
-- 
2.30.2