From f73f8c899f7c3ebd675b8a5818cc46a8f5b63adc Mon Sep 17 00:00:00 2001
From: David Edmundson <kde@davidedmundson.co.uk>
Date: Wed, 20 May 2026 11:26:41 +0100
Subject: [PATCH] tabbox: Ignore empty key sequences

If a user has ended up with an empty key sequence in their list of
shortcuts, we cannot look up a key combination for any index.

BUG: 520331
---
 src/tabbox/tabbox.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tabbox/tabbox.cpp b/src/tabbox/tabbox.cpp
index 6574bae028..caec2ad545 100644
--- a/src/tabbox/tabbox.cpp
+++ b/src/tabbox/tabbox.cpp
@@ -740,6 +740,9 @@ static bool areModKeysDepressedX11(const QList<QKeySequence> &shortcuts)
     for (const QKeySequence &seq : shortcuts) {
         uint rgKeySyms[10];
         int nKeySyms = 0;
+        if (seq.isEmpty()) {
+            continue;
+        }
         Qt::KeyboardModifiers mod = seq[seq.count() - 1].keyboardModifiers();
 
         if (mod & Qt::ShiftModifier) {
-- 
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