From c4a5727c2aba9572d0b1941051f7e05cc9eac398 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <patrick.pelissier@gmail.com>
Date: Sun, 17 Feb 2019 09:50:04 +0100
Subject: [PATCH] Fix deref of NULL pointer.

---
 m-string.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/m-string.h b/m-string.h
index 09c9fb38..4006d572 100644
--- a/m-string.h
+++ b/m-string.h
@@ -1120,8 +1120,8 @@ string_it(string_it_t it, const string_t str)
 {
   STRINGI_CONTRACT(str);
   assert(it != NULL);
-  it->ptr      = str->ptr;
-  it->next_ptr = str->ptr;
+  it->ptr      = string_get_cstr(str);
+  it->next_ptr = it->ptr;
   it->u        = 0;
 }