QSharedMemory does not destroy the segment in destructor

QSharedMemory does not destroy the segment in it's destructor. Docs say:

If this shared memory object is the last one connected to the shared memory segment, the detach() operation destroys the shared memory segment.

https://doc.qt.io/qt-6/qsharedmemory.html#dtor.QSharedMemory

The shared memory is created and the process exists, but when it is run again it fails to create because the destructor did not destroy the segment.
Sample program:

#include <QtDebug>
#include <QCoreApplication>
#include <QSharedMemory>
#include <QNativeIpcKey>

int main(int argc, char* argv[])
{
    QCoreApplication app(argc, argv);
    QNativeIpcKey ipcKey = QSharedMemory::platformSafeKey("org.mediafx.memory");
    QSharedMemory ipcMemory(ipcKey);
    if (!ipcMemory.create(10, QSharedMemory::ReadWrite)) {
        qCritical() << "create failed:" << ipcMemory.errorString();
        return 1;
    }
    qCritical() << "shmem created";
    return 0;
}

> ./shmem
shmem created
> ./shmem
create failed: "QSharedMemory::attach (shm_open): already exists"

Also not that the error message is incorrect (it says "QSharedMemory::attach" but is actually from the "QSharedMemory::create" method):
https://github.com/qt/qtbase/blob/dec1863c7dc63e5788b0c6c061d36e856a6ae2b2/src/corelib/ipc/qsharedmemory_posix.cpp#L73