[gnome-builder/wip/gtk4-port] plugins/clang: bail highlighter when in destruction

[Christian Hergert <chergert src gnome org>]

commit 3e767eba1ff19732065669492ba9fff2e791cd78
Author: Christian Hergert <chergert redhat com>
Date:   Mon May 2 17:38:37 2022 -0700

    plugins/clang: bail highlighter when in destruction

 src/plugins/clang/ide-clang-highlighter.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/plugins/clang/ide-clang-highlighter.c b/src/plugins/clang/ide-clang-highlighter.c
index c9ca40a8d..281221f9d 100644
--- a/src/plugins/clang/ide-clang-highlighter.c
+++ b/src/plugins/clang/ide-clang-highlighter.c
@@ -351,7 +351,8 @@ ide_clang_highlighter_queue_udpate (IdeClangHighlighter *self)
 {
   g_assert (IDE_IS_CLANG_HIGHLIGHTER (self));
 
-  if (self->queued_source != 0)
+  if (self->queued_source != 0 ||
+      ide_object_in_destruction (IDE_OBJECT (self)))
     return;
 
   self->queued_source =