Hi all, big fan. Been chasing a bug for a while and finally found it today. Here is the repro:

func TestEmptyLine(t *testing) {
	iso := map[string]any{
		"attrs": []any{
			map[string]any{
				"value": "\ndebug",
			},
		},
	}

	var node yaml.Node
	err = node.Encode(iso)
	require.NoError(t, err, "Failed to parse YAML attributes")
}

Encode returns an error saying: "yaml: line 1: did not find expected key". Encode does a yaml generation step, then sends that yaml back through the parser to update Node. I got in the middle there and say this as the generated yaml:

attrs:
    - value: |4-
        debug

I found that if the string does not contain a newline at the start, the encoding works fine.