encoding/json: Data referenced in the loop cannot be processed correctly

[wzshiming]

I think this should be a problem, but I don't know how to solve it

package main

import (
	"encoding/json"
)

type A struct {
	P *A
}

func main() {
	a := &A{}
	a.P = a
	json.Marshal(a)
	// runtime: goroutine stack exceeds 1000000000-byte limit
	// fatal error: stack overflow
}

[crvv]

https://golang.org/pkg/encoding/json/

JSON cannot represent cyclic data structures and Marshal does not handle them. Passing cyclic structures to Marshal will result in an infinite recursion.

Please read https://stackoverflow.com/questions/3010357/define-cyclic-data-structures

[wzshiming]

I know that's the reason, but I wonder if this needs to be dealt with

[crvv]

The document says "Passing cyclic structures to Marshal will result in an infinite recursion".
And the behavior is correct according to the document.
So there isn't any bug here.

[wzshiming]

I see. Thank you