Syntax error in array [,] parsed as [null]

[mayacoda]

Hello,

I'm using js-yaml in a code editor that supports json and yaml user input and then transforms the content (if it is valid) into javascript objects for further manipulation.

I've encountered the following bug: If an array contains an extra comma ,, instead of throwing an exception for invalid yaml or json, the parser transforms the value into null. Although I include several other options, this is the simplest case in which the error occurs.

Code snippet:

var yaml = require('js-yaml');

var result = yaml.safeLoad('[,,]');

Expected:
YAMLException is thrown

Actual:

result === [null, null]

[puzrin]

Seems to be a bug. libyaml-based parsers return error

• http://yaml-online-parser.appspot.com/
• http://ben-kiki.org/ypaste/

@dervus ?

[rlidwka]

Fixed in adfee17 (currently in dev branch, gonna be released as js-yaml 4 later).