From 6ae8fae8696623b527c7fb22567f6a3705b2f0dd Mon Sep 17 00:00:00 2001
From: Yegappan Lakshmanan <yegappan@yahoo.com>
Date: Sun, 12 Dec 2021 16:26:44 +0000
Subject: patch 8.2.3788: lambda for option that is a function may be freed

Problem:    Lambda for option that is a function may be garbage collected.
Solution:   Set a reference in the funcref. (Yegappan Lakshmanan,
            closes #9330)
---
 src/ops.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

(limited to 'src/ops.c')

diff --git a/src/ops.c b/src/ops.c
index a1afc258e..f58d6f8d1 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -3341,12 +3341,28 @@ set_operatorfunc_option(void)
     void
 free_operatorfunc_option(void)
 {
-#  ifdef FEAT_EVAL
+# ifdef FEAT_EVAL
     free_callback(&opfunc_cb);
-#  endif
+# endif
 }
 #endif
 
+/*
+ * Mark the global 'operatorfunc' callback with 'copyID' so that it is not
+ * garbage collected.
+ */
+    int
+set_ref_in_opfunc(int copyID UNUSED)
+{
+    int abort = FALSE;
+
+#ifdef FEAT_EVAL
+    abort = set_ref_in_callback(&opfunc_cb, copyID);
+#endif
+
+    return abort;
+}
+
 /*
  * Handle the "g@" operator: call 'operatorfunc'.
  */
-- 
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