From f003609d3502efa022dc9c1d2eee14e995eabdbb Mon Sep 17 00:00:00 2001
From: Luca Bacci <luca.bacci982@gmail.com>
Date: Wed, 18 Oct 2023 16:02:03 +0200
Subject: [PATCH] GtkIMContextIME: Avoid committing NULL string

We may get invalid UTF-16 sequences when third party
apps or hooks inject WM_CHAR messages.

Validate the unicode string before committing.

Fixes https://gitlab.com/inkscape/inkscape/-/issues/2088
---
 modules/input/gtkimcontextime.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/input/gtkimcontextime.c b/modules/input/gtkimcontextime.c
index 30c56c59cd..5bc65793e2 100644
--- a/modules/input/gtkimcontextime.c
+++ b/modules/input/gtkimcontextime.c
@@ -336,6 +336,9 @@ gtk_im_context_ime_filter_keypress (GtkIMContext *context,
     return FALSE;
 
   utf8 = g_utf16_to_utf8 (event_priv->translation, event_priv->translation_len, NULL, NULL, NULL);
+  if (!utf8)
+    return FALSE;
+
   g_signal_emit_by_name (context_ime, "commit", utf8);
   g_free (utf8);