Improve support for memory leak detection

When building with the address sanitizer on, free some more resources before
exiting.  (This is unnecessary when not looking for memory leaks.)
* src/patch.c (init_files_to_delete): Add dispose function for freeing
filenames.

backport--Improve-support-for-memory-leak-detection.patch

@@ -0,0 +1,55 @@
+From 312b793db6f549a3d4036b5d0ed2265c451ede15 Mon Sep 17 00:00:00 2001
+From: Andreas Gruenbacher <agruen@gnu.org>
+Date: Thu, 27 Jun 2019 11:02:02 +0200
+Subject: [PATCH] Improve support for memory leak detection
+
+When building with the address sanitizer on, free some more resources before
+exiting.  (This is unnecessary when not looking for memory leaks.)
+* src/patch.c (init_files_to_delete): Add dispose function for freeing
+filenames.
+
+Signed-off-by: Xibo.Wang <wangxb12@chinatelecom.cn>
+---
+ src/patch.c | 16 +++++++++++++++-
+ 1 file changed, 15 insertions(+), 1 deletion(-)
+
+diff --git a/src/patch.c b/src/patch.c
+index 99a5904..e57cf19 100644
+--- a/src/patch.c
++++ b/src/patch.c
+@@ -36,6 +36,10 @@
+ #include <minmax.h>
+ #include <safe.h>
+ 
++#ifdef __SANITIZE_ADDRESS__
++# define FREE_BEFORE_EXIT
++#endif
++
+ /* procedures */
+ 
+ static FILE *create_output_file (char const *, int);
+@@ -1777,10 +1781,20 @@ struct file_to_delete {
+ 
+ static gl_list_t files_to_delete;
+ 
++#ifdef FREE_BEFORE_EXIT
++void dispose_file_to_delete (const void *elt)
++{
++	free ((void *) elt);
++}
++#else
++#define dispose_file_to_delete NULL
++#endif
++
+ static void
+ init_files_to_delete (void)
+ {
+-  files_to_delete = gl_list_create_empty (GL_LINKED_LIST, NULL, NULL, NULL, true);
++  files_to_delete = gl_list_create_empty (GL_LINKED_LIST, NULL, NULL,
++					  dispose_file_to_delete, true);
+ }
+ 
+ static void
+-- 
+1.8.3.1
+

patch.spec

@@ -1,6 +1,6 @@
 Name:		patch
 Version:	2.7.6
-Release:	18
+Release:	19
 Summary:	Utiliity which applies a patch file to original files.
 License:	GPLv3+
 URL:	 	http://www.gnu.org/software/patch/patch.html
@@ -19,6 +19,7 @@ Patch10:        Test-suite-compatibility-fixes.patch
 Patch11:        Test-suite-fix-Korn-shell-incompatibility.patch
 Patch12:        backport-maint-avoid-warnings-from-GCC8.patch
 Patch13:        backport-Make-the-debug-2-output-more-useful.patch
+Patch14:        backport--Improve-support-for-memory-leak-detection.patch
 
 BuildRequires:	gcc libselinux-devel libattr-devel ed
 Buildroot:	%{_tmppath}/%{name}-%{version}-%{release}-root-root
@@ -61,6 +62,9 @@ CFLAGS="$RPM_OPT_FLAGS -D_GNU_SOURCE"
 %{_mandir}/man1/*
 
 %changelog
+* Wed Dec 28 2022 Xibo.Wang <wangxb12@chinatelecom.cn> - 2.7.6-19
+- Improve support for memory leak detection
+
 * Wed Dec 28 2022 Xibo.Wang <wangxb12@chinatelecom.cn> - 2.7.6-18
 - Make the (debug & 2) output more useful