Panic when parsing "! !00 \xf6" string

[prymitive]

Found via fuzzing tests added to Go 1.18

package main

import (
	"fmt"

	"gopkg.in/yaml.v3"
)

func main() {
	defer func() {
		if r := recover(); r != nil {
			fmt.Printf("panic: %s", r)
		}
	}()

	var node yaml.Node
	yaml.Unmarshal([]byte(string("! !00 \xf6")), &node)
}

https://go.dev/play/p/28Dlf2ncCct

[Zenithar]

Same with string("! !!0 \xf7")

[tcarreira]

I think this issue is fixed already.
At least the example you gave passes fine with no panic.

[prymitive]

#666 fixed it

[dolmen]

@prymitive Could you submit your fuzzing code?