Basic example of a go program which panic math/rng because of vet/feed not being thread safe :(

panic_rng.go

package main

import (
	"fmt"
	"math/rand"
	"sync"
)

var (
	seed    = int64(1531832676684917546)
	rng     = rand.New(rand.NewSource(seed))
	workers = 10
)

func main() {
	rand.Seed(seed)

	var waitGroup sync.WaitGroup
	waitGroup.Add(workers)

	res := make(chan int, workers)
	go func() {
		for i := 0; i < workers; i++ {
			go func(idx int) {
				defer waitGroup.Done()
				fmt.Println("Started worker:", idx)
				for i := 0; i < 1000000; i++ {
					rng.Int63()
				}
				res <- 0
				fmt.Println("Ended worker:", idx)
			}(i)
		}
	}()

	waitGroup.Wait()
	close(res)
}