From d009bf2f46f4445f6bb6a5e403deb1a0d75c8d70 Mon Sep 17 00:00:00 2001
From: Steve Bennett <steveb@workware.net.au>
Date: Tue, 2 Apr 2024 07:37:49 +1000
Subject: lreplace: avoid memmove() with NULL pointer

In the case there is nothing to insert

Could be provoked with: lreplace {a b} 0 0

Fixes: #300
Signed-off-by: Steve Bennett <steveb@workware.net.au>
---
 jim.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/jim.c b/jim.c
index 8588b7f..f364c00 100644
--- a/jim.c
+++ b/jim.c
@@ -7114,6 +7114,11 @@ static void ListInsertElements(Jim_Obj *listPtr, int idx, int elemc, Jim_Obj *co
     int i;
     Jim_Obj **point;
 
+    if (elemc == 0) {
+        /* Nothing to do */
+        return;
+    }
+
     if (requiredLen > listPtr->internalRep.listValue.maxLen) {
         if (currentLen) {
             /* Assume that we will need extra space for future expansion */
-- 
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