[konsole] [Bug 475687] konsole crashes when changing input methods in ibus-typing-booster

[Mike FABIAN]

https://bugs.kde.org/show_bug.cgi?id=475687

--- Comment #3 from Mike FABIAN <mfabian at redhat.com> ---
It is a Qt bug actually, this commit fixed it:

$ git show e68a0da0b90
commit e68a0da0b907af7980481a3cf30f6b4b97c06b6e
Author: Alexander Volkov <avolkov at astralinux.ru>
Date:   Mon Mar 6 18:10:34 2023 +0300

    Avoid crash when keysymToQtKey(keysym, Qt::ControlModifier) is called

    For example when Ctrl+Home is sent by virtual keyboard on Wayland.

    Pick-to: 6.6 6.5 6.2 5.15
    Change-Id: I41f1d2a28c9091efa621d5826a3b9e3e0e481ceb
    Reviewed-by: Liang Qi <liang.qi at qt.io>

diff --git a/src/gui/platform/unix/qxkbcommon.cpp
b/src/gui/platform/unix/qxkbcommon.cpp
index d254aeecdc..162ba90efe 100644
--- a/src/gui/platform/unix/qxkbcommon.cpp
+++ b/src/gui/platform/unix/qxkbcommon.cpp
@@ -731,6 +731,8 @@ xkb_keysym_t QXkbCommon::lookupLatinKeysym(xkb_state
*state, xkb_keycode_t keyco
 {
     xkb_layout_index_t layout;
     xkb_keysym_t sym = XKB_KEY_NoSymbol;
+    if (!state)
+        return sym;
     xkb_keymap *keymap = xkb_state_get_keymap(state);
     const xkb_layout_index_t layoutCount =
xkb_keymap_num_layouts_for_key(keymap, keycode);
     // Look at user layouts in the order in which they are defined in system

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