Assertion `ctx->pollfds_cnt >= internal_nfds' failed.

[FFY00]

Hey, I am trying to run a really simple example but I get an error when executing hid_exit().
I am running the latest libusb (1.0.22).

Code

#include <stdio.h>
#include <stdlib.h>
#include "hidapi.h"

#define MAX_STR 255

int main(int argc, char* argv[])
{
	int res;
	unsigned char buf[65];
	wchar_t wstr[MAX_STR];
	hid_device *handle;
	int i;

	// Initialize the hidapi library
	res = hid_init();

	// Open the device using the VID, PID,
	// and optionally the Serial number.
	handle = hid_open(0x1038, 0x1720, NULL);

	// Read the Manufacturer String
	res = hid_get_manufacturer_string(handle, wstr, MAX_STR);
	wprintf(L"Manufacturer String: %s\n", wstr);

	// Read the Product String
	res = hid_get_product_string(handle, wstr, MAX_STR);
	wprintf(L"Product String: %s\n", wstr);

	// Read the Serial Number String
	res = hid_get_serial_number_string(handle, wstr, MAX_STR);
	wprintf(L"Serial Number String: (%d) %s\n", wstr[0], wstr);

	// Read Indexed String 4
	res = hid_get_indexed_string(handle, 4, wstr, MAX_STR);
	wprintf(L"Indexed String 4: %s\n", wstr);

    // Read Indexed String 5
	res = hid_get_indexed_string(handle, 5, wstr, MAX_STR);
	wprintf(L"Indexed String 5: %s\n", wstr);

	// Request state (cmd 0x81). The first byte is the report number (0x0).
	buf[0] = 0x0;
	buf[1] = 0x90;
	res = hid_write(handle, buf, 65);

	// Read requested state
	res = hid_read(handle, buf, 65);

	// Print out the returned buffer.
	for (i = 0; i < 4; i++)
		printf("buf[%d]: %d\n", i, buf[i]);

	// Finalize the hidapi library
	res = hid_exit();

	return 0;
}

I am using my Steelseries Rival 310 as an example. The output should be something like what is showed here.

Output

Manufacturer String: S
Product String: S
Serial Number String: (48) 0
Indexed String 4: S
Indexed String 5: S
test-hidapi-c-rival310: io.c:2116: handle_events: Assertion `ctx->pollfds_cnt >= internal_nfds' failed.
fish: “./test-hidapi-c-rival310” terminated by signal SIGABRT (Abort)

Fish is my shell

[hepoun]

I observed the same problem (with slightly modified example code) and I resolved the issue by adding hid_close(handle) before hid_exit().