From e77e589a35862f6ac9c4141cfd1beb2844b84c61 Mon Sep 17 00:00:00 2001
From: drh <>
Date: Thu, 26 Jun 2025 18:57:20 +0000
Subject: Work around an apparent GCC UBSAN bug.  See
 [forum:/forumpost/1d7c25d4a2d6f5e2|forum thread 1d7c25d4a2d] for details.

FossilOrigin-Name: 23056532e51abcff486e38a3319545e6663b4a855abe1bc443e2cd7e0473748c
---
 src/btree.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/btree.c b/src/btree.c
index dc73ac559..1806a914a 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -8696,7 +8696,12 @@ static int balance_nonroot(
   ** of the right-most new sibling page is set to the value that was
   ** originally in the same field of the right-most old sibling page. */
   if( (pageFlags & PTF_LEAF)==0 && nOld!=nNew ){
-    MemPage *pOld = (nNew>nOld ? apNew : apOld)[nOld-1];
+    MemPage *pOld;
+    if( nNew>nOld ){
+      pOld = apNew[nOld-1];
+    }else{
+      pOld = apOld[nOld-1];
+    }
     memcpy(&apNew[nNew-1]->aData[8], &pOld->aData[8], 4);
   }
 
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