From 26460328bc92605f5c3a41dc1963519299c6e266 Mon Sep 17 00:00:00 2001
From: Eli Zaretskii <eliz@gnu.org>
Date: Sat, 5 Nov 2022 15:19:42 +0200
Subject: [PATCH] Fix the unexec build

* src/itree.c (forget_itree): New function.
* src/emacs.c (Fdump_emacs): Call 'forget_itree'.
---
 src/emacs.c | 2 ++
 src/itree.c | 8 ++++++++
 src/itree.h | 1 +
 3 files changed, 11 insertions(+)

diff --git a/src/emacs.c b/src/emacs.c
index 40ba0db340d..1b2aa9442b7 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -3105,6 +3105,8 @@ You must run Emacs in batch mode in order to dump it.  */)
   gflags.will_dump_with_unexec_ = false;
   gflags.dumped_with_unexec_ = true;
 
+  forget_itree ();
+
   alloc_unexec_pre ();
 
   unexec (SSDATA (filename), !NILP (symfile) ? SSDATA (symfile) : 0);
diff --git a/src/itree.c b/src/itree.c
index cd37da18b89..c5e43bb0289 100644
--- a/src/itree.c
+++ b/src/itree.c
@@ -294,6 +294,14 @@ init_itree (void)
   iter = itree_iterator_create (NULL);
 }
 
+#ifdef HAVE_UNEXEC
+void
+forget_itree (void)
+{
+  iter = NULL;
+}
+#endif
+
 struct check_subtree_result
 {
   /* Node count of the tree.  */
diff --git a/src/itree.h b/src/itree.h
index d05bc7789a3..436fcfc7a07 100644
--- a/src/itree.h
+++ b/src/itree.h
@@ -107,6 +107,7 @@ enum itree_order
   };
 
 extern void init_itree (void);
+extern void forget_itree (void);
 extern void itree_node_init (struct itree_node *, bool, bool, Lisp_Object);
 extern ptrdiff_t itree_node_begin (struct itree_tree *, struct itree_node *);
 extern ptrdiff_t itree_node_end (struct itree_tree *, struct itree_node *);
-- 
2.39.2