From 3add9beb593696aaf09de21e534a019685855481 Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Thu, 5 Feb 2026 06:17:52 +0000
Subject: [PATCH] sv: fix possible runtime issue with NULL SV's in sv_copy

---
 src/sv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/sv.c b/src/sv.c
index d6fcf0a..1fb8521 100644
--- a/src/sv.c
+++ b/src/sv.c
@@ -12,6 +12,10 @@
 
 sv_t sv_copy(sv_t old)
 {
+  if (old.size == 0)
+    return SV(old.data, 0);
+  else if (old.data == NULL)
+    return SV(NULL, old.size);
   char *newstr = calloc(1, (old.size + 1) * sizeof(*newstr));
   memcpy(newstr, old.data, old.size);
   newstr[old.size] = '\0';