Encoding recursive structs panics since 1.22.0

[molecule-man]

package main

import (
	"github.com/guregu/dynamo"
)

func main() {
	type item struct {
		ChildItems []item
	}

	dynamo.MarshalItem(item{})
}

Running this code crashes with panic:

runtime: goroutine stack exceeds 1000000000-byte limit
runtime: sp=0xc020380318 stack=[0xc020380000, 0xc040380000]
fatal error: stack overflow

runtime stack:
runtime.throw({0x6bcc91?, 0x200000008?})
        /usr/lib/go/src/runtime/panic.go:1077 +0x5c fp=0x7fdd6d1ecca0 sp=0x7fdd6d1ecc70 pc=0x4363dc
runtime.newstack()
        /usr/lib/go/src/runtime/stack.go:1107 +0x5ac fp=0x7fdd6d1ece50 sp=0x7fdd6d1ecca0 pc=0x44fc0c
traceback: unexpected SPWRITE function runtime.morestack
runtime.morestack()
        /usr/lib/go/src/runtime/asm_amd64.s:593 +0x8f fp=0x7fdd6d1ece58 sp=0x7fdd6d1ece50 pc=0x46542f

goroutine 1 [running]:
reflect.(*rtype).NumField(0x68da20?)
        /usr/lib/go/src/reflect/type.go:760 +0x65 fp=0xc020380328 sp=0xc020380320 pc=0x484905
github.com/guregu/dynamo.visitTypeFields({0x9d3480?, 0x68da20?}, 0x0, {0x0, 0x0, 0x0}, 0xc020380608)
...
...

[guregu]

Hello. Sorry about that. I just released v1.22.2 which should fix this issue. Please give it a try.

[guregu]

v1.22.3 (just released) supports deeper recursion beyond simple self-recursion.
This wacky type works now!

type MegaRecursiveA struct {
	ID      int
	Child   MegaRecursiveB
	Text    string
	Friends []MegaRecursiveA
	Enemies []MegaRecursiveB
}

type MegaRecursiveB struct {
	ID    string
	Child *MegaRecursiveA
	Blah  int `dynamo:",omitempty"`
}