From 8592a8591ba7334e2420ec5726a081a5e45f969b Mon Sep 17 00:00:00 2001
From: Carlos Garnacho <carlosg@gnome.org>
Date: Tue, 24 Mar 2020 16:52:55 +0100
Subject: [PATCH] wayland: Handle NULL preedit text

The preedit text may be NULL (eg. when unsetting it). This started
causing crashes since commit db9b60cc635, duh.

Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1132
---
 src/wayland/meta-wayland-text-input.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/wayland/meta-wayland-text-input.c b/src/wayland/meta-wayland-text-input.c
index deff44c1b..4e7d18b25 100644
--- a/src/wayland/meta-wayland-text-input.c
+++ b/src/wayland/meta-wayland-text-input.c
@@ -207,10 +207,12 @@ meta_wayland_text_input_focus_set_preedit_text (ClutterInputFocus *focus,
 {
   MetaWaylandTextInput *text_input;
   struct wl_resource *resource;
-  gsize pos;
+  gsize pos = 0;
 
   text_input = META_WAYLAND_TEXT_INPUT_FOCUS (focus)->text_input;
-  pos = g_utf8_offset_to_pointer (text, cursor) - text;
+
+  if (text)
+    pos = g_utf8_offset_to_pointer (text, cursor) - text;
 
   wl_resource_for_each (resource, &text_input->focus_resource_list)
     {