Seed the "rand".

DevotionGeo · web-flow · commit 4e206978ac4a · 2016-10-01T01:21:21.000+05:00
The script is intended to show students what a Race Condition is, so it will trigger a race condition, that wasn't expected to be fixed. 
Just the "rand" seeded.
diff --git a/22_go-routines/06_race-condition/main.go b/22_go-routines/06_race-condition/main.go
@@ -19,6 +19,7 @@ func main() {
 }
 
 func incrementor(s string) {
+	rand.Seed(time.Now().UnixNano())
 	for i := 0; i < 20; i++ {
 		x := counter
 		x++

Original file line number	Diff line number	Diff line change
`@@ -19,6 +19,7 @@ func main() {`
`19`	`19`	`}`
`20`	`20`
`21`	`21`	`func incrementor(s string) {`
	`22`	`+ rand.Seed(time.Now().UnixNano())`
`22`	`23`	`for i := 0; i < 20; i++ {`
`23`	`24`	`x := counter`
`24`	`25`	`x++`