Go panic: assignment to entry in nil map

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Go

CPU

-1.0s

MEM

-0M

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package main

import "fmt"

func main() {
	var labels map[string]string
	labels["hello"] = "world"
	fmt.Println(labels)
}

panic: assignment to entry in nil map

goroutine 1 [running]:
main.main()
	/home/user01/runbox.go:7 +0x32
exit status 2

Go

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package main

import "fmt"

func main() {
	labels := map[string]string{}
	labels["hello"] = "world"
	fmt.Println(labels)
}

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Go

Copy

package main

import "fmt"

func main() {
	labels := make(map[string]string)
	labels["hello"] = "world"
	fmt.Println(labels)
}

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