From 6c6e28e3539a92cf5d946775bbeb5133046bfa50 Mon Sep 17 00:00:00 2001
From: Can Alkan <calkan@gmail.com>
Date: Fri, 10 May 2019 11:40:57 +0300
Subject: [PATCH] prefix bug fixed

---
 common.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/common.c b/common.c
index 9910596..e20fadf 100644
--- a/common.c
+++ b/common.c
@@ -520,8 +520,9 @@ void get_working_directory(parameters *params){
   
   directory = strrchr(params->outprefix, '/');
   prefix = NULL;
-  set_str( &prefix, directory + 1);
-  if ( debug_mode)
+  if (directory != NULL)
+    set_str( &prefix, directory + 1);
+  if ( debug_mode && prefix != NULL)
     fprintf (stderr, "prefix: %s\n", prefix);
   
   if (directory == NULL){
@@ -539,13 +540,15 @@ void get_working_directory(parameters *params){
   params->outdir[i]='/';
   params->outdir[i+1] = 0;
 
-  free( params->outprefix);
-  params->outprefix = NULL;
-  if ( debug_mode)
+  if ( debug_mode && prefix != NULL)
     fprintf (stderr, "prefix2: %s\n", prefix);
-  
-  set_str( &(params->outprefix), prefix);
-  free (prefix);
+
+  if (prefix!=NULL){
+    free( params->outprefix);
+    params->outprefix = NULL;
+    set_str( &(params->outprefix), prefix);
+    free (prefix);
+  }
 }
 
 char *get_file_name(char *path)