From 6b9b7275e5d4572560ea35b335d84633c1525ea4 Mon Sep 17 00:00:00 2001
From: Lewis Van Winkle <LV@codeplea.com>
Date: Sun, 23 May 2021 18:31:24 -0500
Subject: [PATCH] fix for possible out-of-bounds memory access in repl

---
 repl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/repl.c b/repl.c
index 021a696..5772883 100644
--- a/repl.c
+++ b/repl.c
@@ -19,6 +19,10 @@ static char *readline(const char *prompt) {
     }
 
     size_t len = strlen(line);
+
+    if (len < 1)
+        return NULL;
+
     if (line[len - 1] == '\n') {
         line[len - 1] = '\0';
         len -= 1;