等待篱笆会导致警告并冻结应用程序

Question

我提交队列并指定围栏。在提交之前，我会打印栅栏：

qDebug() << "submitting fence: " << cmdFence;
vkQueueSubmit(gfxQueue, 1, &submitInfo, cmdFence);

这是最近3次提交的结果：

submitting fence:  0x145
submitting fence:  0x142
submitting fence:  0x145

在其他地方，我有一个代码应该等待栅栏：

qDebug() << "waiting for fences";
for(auto f : activeFences)
    qDebug() << "fence " << f;

if(vkWaitForFences(m_moduleData.deviceData.device,
                   static_cast<uint32_t>(activeFences.size()),
                   activeFences.data(),
                   VK_TRUE,
                   UINT64_MAX) != VK_SUCCESS)
{
    throw std::runtime_error{"failed to wait for fences"};
}

可以看出，在等待之前，我也在打印栅栏，这就是在vkWaitForFences致电之前得到的：

waiting for fences
fence  0x142

先前提交的同一栅栏0x142！但是验证层会产生警告：

vkWaitForFences called for fence 0x142 which has not been submitted on a Queue or during acquire next image.

应用程序可能在无限等待中冻结。但是为什么呢？