From f9056e556778fe5dd594e0e3607b6caed5b17f4d Mon Sep 17 00:00:00 2001
From: Arun Prakash Jana <engineerarun@gmail.com>
Date: Thu, 21 Feb 2019 23:05:06 +0530
Subject: [PATCH] Fix #30

---
 src/bcal.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/bcal.c b/src/bcal.c
index eac4497..80dedcb 100644
--- a/src/bcal.c
+++ b/src/bcal.c
@@ -1925,7 +1925,8 @@ static int evaluate(char *exp, ulong sectorsz)
 	char *expr = fixexpr(exp, &ret);  /* Make parsing compatible */
 	char *ptr;
 
-	log(DEBUG, "expr: %s\n", expr);
+	if (expr)
+		log(DEBUG, "expr: %s\n", expr);
 
 	if (expr == NULL) {
 		if (ret)