From 0f6c40c15e20c8da57c314d047e9e899fae8d84c Mon Sep 17 00:00:00 2001
From: derselbst <tom.mbrt@googlemail.com>
Date: Sat, 29 Dec 2018 19:58:10 +0100
Subject: [PATCH] stop adding empty strings to readline's history

---
 src/utils/fluid_sys.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/utils/fluid_sys.c b/src/utils/fluid_sys.c
index 4ac1344b..d686737f 100644
--- a/src/utils/fluid_sys.c
+++ b/src/utils/fluid_sys.c
@@ -1214,7 +1214,11 @@ fluid_istream_readline(fluid_istream_t in, fluid_ostream_t out, char *prompt,
 
         FLUID_SNPRINTF(buf, len, "%s", line);
         buf[len - 1] = 0;
-        add_history(buf);
+
+        if(buf[0] != '\0')
+        {
+            add_history(buf);
+        }
 
         free(line);
         return 1;