From 297b829482b861f2ce00e705390467aa87aafd51 Mon Sep 17 00:00:00 2001
From: Maas-Maarten Zeeman <mmzeeman@xs4all.nl>
Date: Mon, 16 Jun 2014 16:18:17 +0200
Subject: [PATCH] Ensure that an error message is returned

---
 c_src/esqlite3_nif.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/c_src/esqlite3_nif.c b/c_src/esqlite3_nif.c
index 00a0806..0b42202 100644
--- a/c_src/esqlite3_nif.c
+++ b/c_src/esqlite3_nif.c
@@ -144,10 +144,16 @@ get_sqlite3_return_code_msg(int r)
 static const char *
 get_sqlite3_error_msg(int error_code, sqlite3 *db)
 {
+    static const char *msg;
+
     if(error_code == SQLITE_MISUSE) 
         return "Sqlite3 was invoked incorrectly.";
 
-    return sqlite3_errmsg(db); 
+    msg = sqlite3_errmsg(db);
+    if(!msg) 
+        return "No sqlite3 error message found.";
+
+    return msg;
 }
 
 static ERL_NIF_TERM