From ee22399babcac88dc2e07639a3ffc43c4913e8a2 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <patrick.pelissier@gmail.com>
Date: Sun, 9 Jul 2017 19:28:57 +0200
Subject: [PATCH] Add new assertion.

---
 m-string.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/m-string.h b/m-string.h
index 34847c36..fc6a887b 100644
--- a/m-string.h
+++ b/m-string.h
@@ -200,6 +200,7 @@ string_set (string_t v1, const string_t v2)
     if (M_LIKELY (v2->ptr != NULL)) {
       memcpy(v1->ptr, v2->ptr, size+1);
     } else {
+      assert (size == 0);
       v1->ptr[0] = 0;
     }
     v1->size = size;