RangeError: Invalid string length

[dss886]

I have a eletron app which used this lib to get/set ProxyServer on windows and everything works fine when try get/set the reg value.

But the strange thing is that when my program runs for a while it always crashes, stacktrace as below:

RangeError: Invalid string length
    at Socket.<anonymous> (d:\Workspace\dssToolbox\node_modules\winreg\lib\registry.js:98:34)
    at Socket.emit (d:\Workspace\dssToolbox\lib\events.js:526:35)
    at addChunk (d:\Workspace\dssToolbox\lib\internal\streams\readable.js:324:12)
    at readableAddChunk (d:\Workspace\dssToolbox\lib\internal\streams\readable.js:297:9)
    at Socket.push (d:\Workspace\dssToolbox\lib\internal\streams\readable.js:234:10)
    at Pipe.onStreamRead (d:\Workspace\dssToolbox\lib\internal\stream_base_commons.js:190:23)
    at Pipe.callbackTrampoline (node:internal/async_hooks:130:17) {stack: 'RangeError: Invalid string length
    at Sock…Trampoline (node:internal/async_hooks:130:17)', message: 'Invalid string length'}

I located the code in registry.js,:

function captureOutput(child) {
  // Use a mutable data structure so we can append as we get new data and have
  // the calling context see the new data
  var output = {'stdout': '', 'stderr': ''};

  child.stdout.on('data', function(data) { output["stdout"] += data.toString(); });
  child.stderr.on('data', function(data) { output["stderr"] += data.toString(); });

  return output;
}

And add some log:

function captureOutput(child) {
  // Use a mutable data structure so we can append as we get new data and have
  // the calling context see the new data
  var output = {'stdout': '', 'stderr': ''};

  child.stdout.on('data', function(data) { 
    try {
        output["stdout"] += data.toString(); 
    } catch (error) {
        console.log(error);
        console.log(output["stdout"].length);
        console.log(data.toString());
        throw error;
    }
  });
  child.stderr.on('data', function(data) { output["stderr"] += data.toString(); });

  return output;
}

After crash, i got:

RangeError: Invalid string length
    at Socket.<anonymous> (d:\Workspace\dssToolbox\node_modules\winreg\lib\registry.js:98:34)
    at Socket.emit (d:\Workspace\dssToolbox\lib\events.js:526:35)
    at addChunk (d:\Workspace\dssToolbox\lib\internal\streams\readable.js:324:12)
    at readableAddChunk (d:\Workspace\dssToolbox\lib\internal\streams\readable.js:297:9)
    at Socket.push (d:\Workspace\dssToolbox\lib\internal\streams\readable.js:234:10)
    at Pipe.onStreamRead (d:\Workspace\dssToolbox\lib\internal\stream_base_commons.js:190:23)
    at Pipe.callbackTrampoline (node:internal/async_hooks:130:17) {stack: 'RangeError: Invalid string length
    at Sock…Trampoline (node:internal/async_hooks:130:17)', message: 'Invalid string length'}

registry.js:100
536870814
registry.js:101
ֵ ProxyServer �Ѵ��ڣ�Ҫ������(Yes/No)? ֵ ProxyServer �Ѵ��ڣ�Ҫ������(Yes/No)? ֵ ProxyServer �Ѵ��ڣ�Ҫ������(Yes/No)? ֵ ProxyServer �Ѵ��ڣ�Ҫ������(Yes/No)? ֵ ProxyServer �Ѵ��ڣ�Ҫ������(Yes/No)? 

It seems that the length of the output.stdout keeps increasing until it exceeds the upper limit.

How should I solve it (or just try-catch it)?

Any help will be very appreciated.