parse error on valid xml

[unional]

Error discovered from jsdom:
Test code excerpt:

 const xml = new window.DOMParser().parseFromString('<script>x<\/script>', 'text/xml')

 const parseError = xml.getElementsByTagName('parsererror')

// it should be an empty array
console.log(parseError) // HTMLCollection { '0': HTMLUnknownElement {} }

Result in chrome:

Repro here: https://github.com/unional/issues/tree/jsdom-jquery-xml

git clone https://github.com/unional/issues.git
cd issues
git checkout jsdom-jquery-xml
npm install
npm test

jsdom: 9.12.0

Reference: jsdom/jsdom#1775