From 270c21387d57a67c397397d3246ca64031081bd6 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Fri, 7 Oct 1994 17:40:50 +0000
Subject: [PATCH] (make_gap): Keep input blocked till after we set BEG_ADDR.

---
 src/insdel.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/insdel.c b/src/insdel.c
index 969f70dba6e..833d0065a1b 100644
--- a/src/insdel.c
+++ b/src/insdel.c
@@ -271,11 +271,16 @@ make_gap (increment)
 
   BLOCK_INPUT;
   result = BUFFER_REALLOC (BEG_ADDR, (Z - BEG + GAP_SIZE + increment));
-  UNBLOCK_INPUT;
 
   if (result == 0)
-    memory_full ();
+    {
+      UNBLOCK_INPUT;
+      memory_full ();
+    }
+
+  /* We can't unblock until the new address is properly stored.  */
   BEG_ADDR = result;
+  UNBLOCK_INPUT;
 
   /* Prevent quitting in move_gap.  */
   tem = Vinhibit_quit;
-- 
2.39.5