From da495f5340e5756c0e1dab1e53c2235c3e54660d Mon Sep 17 00:00:00 2001
From: keinflue <80230456+keinflue@users.noreply.github.com>
Date: Fri, 16 Apr 2021 21:12:11 +0000
Subject: [PATCH] Fix minor memory leak with input preprocessor. (#150)

If the read doesn't succeed, readfd still returns a malloc'ed buffer.
---
 filename.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/filename.c b/filename.c
index 9cfa4de..3132baa 100644
--- a/filename.c
+++ b/filename.c
@@ -946,10 +946,13 @@ open_altfile(filename, pf, pfd)
 	cmd = readfd(fd);
 	pclose(fd);
 	if (*cmd == '\0')
+	{
 		/*
 		 * Pipe is empty.  This means there is no alt file.
 		 */
+		free(cmd);
 		return (NULL);
+	}
 	return (cmd);
 #endif /* HAVE_POPEN */
 }
-- 
1.8.3.1