Err(InternalError(bug at procfs-core/src/process/status.rs:309 (please report this procfs bug)
Internal Unwrap Error: Failed to parse i ("3555555555") as a T: number too large to fit in target type))

#include <unistd.h>
#include <stdlib.h>
#include <grp.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

int main() {
    gid_t new_gid = 3555555555;
    int ngroups;
    gid_t *groups;

    // Get current number of supplementary groups
    ngroups = getgroups(0, NULL);
    if (ngroups == -1) {
        printf("getgroups failed: %s\n", strerror(errno));
        return 1;
    }

    // Allocate space for current groups plus one more
    groups = malloc((ngroups + 1) * sizeof(gid_t));
    if (!groups) {
        printf("malloc failed\n");
        return 1;
    }

    // Get current supplementary groups
    if (getgroups(ngroups, groups) == -1) {
        printf("getgroups failed: %s\n", strerror(errno));
        free(groups);
        return 1;
    }

    // Add new group
    groups[ngroups] = new_gid;
    ngroups++;

    // Set new supplementary groups list
    if (setgroups(ngroups, groups) == -1) {
        printf("setgroups failed: %s\n", strerror(errno));
        free(groups);
        return 1;
    }

    free(groups);
    printf("Successfully added GID %u\n", new_gid);

    sleep(9999999);
    return 0;
}