From c72e31dfcc013ae840cd7f8899f2430b7f6812c9 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Thu, 16 Jun 2022 18:47:20 +0100
Subject: [PATCH] patch 8.2.5113: timer becomes invalid after fork/exec, :gui
 gives errors

Problem:    Timer becomes invalid after fork/exec, :gui gives errors. (Gabriel
            Dupras)
Solution:   Delete the timer befor forking. (closes #10584)
---
 src/gui.c             |  5 +++++
 src/os_unix.c         | 15 ++++++++++++++-
 src/proto/os_unix.pro |  1 +
 src/version.c         |  2 ++
 4 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/gui.c b/src/gui.c
index 68c64d298e..4408545db3 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -226,6 +226,11 @@ gui_do_fork(void)
     int		exit_status;
     pid_t	pid = -1;
 
+#if defined(FEAT_RELTIME) && defined(HAVE_TIMER_CREATE)
+    // a timer is not carried forward
+    delete_timer();
+#endif
+
     // Setup a pipe between the child and the parent, so that the parent
     // knows when the child has done the setsid() call and is allowed to
     // exit.
diff --git a/src/os_unix.c b/src/os_unix.c
index 766deac9a8..6fd24508dd 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -8247,7 +8247,7 @@ xsmp_close(void)
 #endif // USE_XSMP
 
 #if defined(FEAT_RELTIME) || defined(PROTO)
-# if defined(HAVE_TIMER_CREATE)
+# if defined(HAVE_TIMER_CREATE) || defined(PROTO)
 /*
  * Implement timeout with timer_create() and timer_settime().
  */
@@ -8331,6 +8331,19 @@ start_timeout(long msec)
     return &timeout_flag;
 }
 
+/*
+ * To be used before fork/exec: delete any created timer.
+ */
+    void
+delete_timer(void)
+{
+    if (timer_created)
+    {
+	timer_delete(timer_id);
+	timer_created = FALSE;
+    }
+}
+
 # else
 
 /*
diff --git a/src/proto/os_unix.pro b/src/proto/os_unix.pro
index 91024b104c..268f3bfb65 100644
--- a/src/proto/os_unix.pro
+++ b/src/proto/os_unix.pro
@@ -88,4 +88,5 @@ void xsmp_init(void);
 void xsmp_close(void);
 void stop_timeout(void);
 const int *start_timeout(long msec);
+void delete_timer(void);
 /* vim: set ft=c : */
diff --git a/src/version.c b/src/version.c
index 66b03c3ab7..bfa9c5a263 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5113,
 /**/
     5112,
 /**/
-- 
2.47.2