Do not crash if QApplication::clipboard()->mimeData() is a null pointer

This removes the remaining unchecked accesses to the clipboard mime
data after commit 7828b057da0491f1b08bfaec681067e195d7b6ca. According
to a bug report, it can be a null pointer on Wayland.

BUG: 335053
REVIEW: 118649

1 files changed, 8 insertions, 0 deletions

diff --git a/src/kitemviews/private/kfileitemclipboard.cpp b/src/kitemviews/private/kfileitemclipboard.cpp
index faace2a3a..0dcc81f4f 100644
--- a/src/kitemviews/private/kfileitemclipboard.cpp
+++ b/src/kitemviews/private/kfileitemclipboard.cpp
@@ -55,6 +55,14 @@ KFileItemClipboard::~KFileItemClipboard()
 void KFileItemClipboard::updateCutItems()
 {
     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
+
+    // mimeData can be 0 according to https://bugs.kde.org/show_bug.cgi?id=335053
+    if (!mimeData) {
+        m_cutItems.clear();
+        emit cutItemsChanged();
+        return;
+    }
+
     const QByteArray data = mimeData->data("application/x-kde-cutselection");
     const bool isCutSelection = (!data.isEmpty() && data.at(0) == QLatin1Char('1'));
     if (isCutSelection) {