From c795e3df7aacc12f064a491ca1bc61923185e2df Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Sun, 17 May 2020 13:47:28 +0000
Subject: Avoid harmless UB in memcpy() in the JSON extension.

FossilOrigin-Name: 69e149f76853d196c8855fedfc98848b60fb116ac36bc08824b1a122469f8ece
---
 ext/misc/json1.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'ext/misc/json1.c')

diff --git a/ext/misc/json1.c b/ext/misc/json1.c
index d42cad17a..caf7a99d6 100644
--- a/ext/misc/json1.c
+++ b/ext/misc/json1.c
@@ -254,6 +254,7 @@ static int jsonGrow(JsonString *p, u32 N){
 /* Append N bytes from zIn onto the end of the JsonString string.
 */
 static void jsonAppendRaw(JsonString *p, const char *zIn, u32 N){
+  if( N==0 ) return;
   if( (N+p->nUsed >= p->nAlloc) && jsonGrow(p,N)!=0 ) return;
   memcpy(p->zBuf+p->nUsed, zIn, N);
   p->nUsed += N;
-- 
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