From f632c3fd86fce2c495a290dd70f5f09e3e7e7a28 Mon Sep 17 00:00:00 2001
From: Hans-Bernhard Broeker <HBBroeker@T-Online.de>
Date: Sat, 13 Apr 2019 14:52:35 +0200
Subject: [PATCH 5/9] Avoid double-free via double fclose in changestring.

Mark closed FILE* by setting it to NULL, and check for that.

Signed-off-by: Vladis Dronov <vdronov@redhat.com>
---
 src/command.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/command.c b/src/command.c
index 8740b11..dcb5278 100644
--- a/src/command.c
+++ b/src/command.c
@@ -786,6 +786,7 @@ changestring(void)
     }
     fprintf(script, "w\nq\n!\n");	/* write and quit */
     fclose(script);
+    script = NULL;
 
     /* if any line was marked */
     if (anymarked == YES) {
@@ -803,7 +804,9 @@ changestring(void)
     }
     changing = NO;
     mousemenu();
-    fclose(script);
+    if (script != NULL) {
+	fclose(script);
+    }
     free(change);
     return(anymarked);
 }
-- 
2.26.2