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Occasionally an error occurs when calling findByIds / usb.getDeviceList()

See original GitHub issue

Environment

win7 64bit
electron 12
usb 1.7.1

Error stack

What went wrong

exports.findByIds = function(vid, pid) {
	var devices = usb.getDeviceList()   // ** That's what went wrong here

	for (var i = 0; i < devices.length; i++) {
		var deviceDesc = devices[i].deviceDescriptor
		if ((deviceDesc.idVendor == vid) && (deviceDesc.idProduct == pid)) {
			return devices[i]
		}
	}
}

Issue Analytics

State:
Created 2 years ago
Comments:12 (4 by maintainers)

Top GitHub Comments

1reaction

gniezencommented, Mar 25, 2022

Amazing work, thanks @mildsunrise !

1reaction

mildsunrisecommented, Mar 24, 2022

Okay, it took me a while to realize this “Invalid argument” error message does not come from libusb, it seems to be an N-API error: https://github.com/nodejs/node/blob/718be08686312d19645861b9715491a49ee3c9cb/src/js_native_api_v8.cc#L730 which is thrown as a C++ exception by the N-API C++ wrapper.

maybe napi_invalid_arg is thrown here, when attempting the conversion to Device? in that case it should be easy to fix. I’ll debug more later.