Cannot read property 'send' of null - worker.terminate() BUG

[JoshuaeKaiser]

Using multer to produce a small proof of concept I came across this bug.

Node throws me an error 'Cannot read property 'send' of null '

app.post('/upload', async (req, response) => {
    let finalResponse = response;
    await upload(req, response, err => {
        fs.readFile(`./uploads/${req.file.originalname}`, async (error, data) => {
            interpretAndSend(data, finalResponse);
        });
    });
});

async function interpretAndSend(imgData, res) {
    await worker.load();
    await worker.loadLanguage('eng');
    await worker.initialize('eng');
    const {
        data: { text },
    } = await worker.recognize(imgData);
    await worker.terminate(); <----- Issue Here
    res.send(text);
}

The first time i call the route everything works fine. When i try to pass a file to the route a second time I get the error in the console. I managed to track it down to worker.terminate();

If I comment out worker.terminate(); then the app works fine, no idea what the route cause of it is.

[jeromewu]

When you can Worker.terminate(), it will terminate the child_process (web worker in browser) in the background, which makes this worker unusable, that's why it fails to execute in the second run.

[ssengedonazil]

That the right solution .. for me thnx