Should be able to add an attribute after expanding an array

[erikerikson]

Executed:

const Yawn = require('yawn-yaml/cjs')

const input = `
a:
  - b
c:
  d: e
`
const original = new Yawn(input)
const json = original.json

json.a.push('z')

json.c.f = {}
json.c.f.g = 'h'

console.log(JSON.stringify(json, null, 2))

original.json = json
console.log(original.yaml)

Expected:

{
  "a": [
    "b",
    "z"
  ],
  "c": {
    "d": "e",
    "f": {
      "g": "h"
    }
  }
}

a:
  - b
  - z
c:
  d: e
  f:
    g: h

Observed:

{
  "a": [
    "b",
    "z"
  ],
  "c": {
    "d": "e",
    "f": {
      "g": "h"
    }
  }
}

~/node_modules/yaml-js/lib/scanner.js:504
throw new exports.ScannerError(null, null, 'mapping values are not allowed here', this.get_mark());
^
mapping values are not allowed here
on line 8, column 12
at ScannerError.YAMLError [as constructor] (~/node_modules/yaml-js/lib/errors.js:70:46)
at ScannerError.MarkedYAMLError [as constructor] (~/node_modules/yaml-js/lib/errors.js:90:45)
at new ScannerError (~/node_modules/yaml-js/lib/scanner.js:23:49)
at Constructor.__dirname.Scanner.Scanner.fetch_value (~/node_modules/yaml-js/lib/scanner.js:504:19)
at Constructor.__dirname.Scanner.Scanner.fetch_more_tokens (~/node_modules/yaml-js/lib/scanner.js:214:21)
at Constructor.__dirname.Scanner.Scanner.check_token (~/node_modules/yaml-js/lib/scanner.js:115:14)
at Constructor.__dirname.Parser.Parser.parse_block_mapping_key (~/node_modules/yaml-js/lib/parser.js:421:16)
at Constructor.__dirname.Parser.Parser.check_event (~/node_modules/yaml-js/lib/parser.js:61:48)
at Constructor.__dirname.Composer.Composer.compose_mapping_node (~/node_modules/yaml-js/lib/composer.js:248:20)
at Constructor.__dirname.Composer.Composer.compose_node (~/node_modules/yaml-js/lib/composer.js:160:21)

Process finished with exit code 1