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Details

Type: Bug
Resolution: Unresolved
Priority: P2: Important
Fix Version/s: None
Affects Version/s: 5.15.2, 6.5.1
Component/s: GUI: Window management
Labels:
None

Platform/s:

Windows
Commits:
63824363a (dev), 1a628e82c (6.6), 95e6b2f2b (tqtc/lts-5.15), 2a2db6352 (6.5)

Description

Straight forward enough, it is possible for QWindowPrivate::create() to fail.

QWindow::winId() doesn't check if it is null

void QWindowPrivate::create(bool recursive, WId nativeHandle)
...
if (!platformWindow) {
qWarning() << "Failed to create platform window for" << q << "with flags" << q->flags();
return;
} 


WId QWindow::winId() const{    
    Q_D(const QWindow);

    if(!d->platformWindow)
         const_cast<QWindow *>(this)->create();
      
    //No null check
    return d->platformWindow->winId();
}