Parsing `application/x-www-form-urlencoded` byte sequence is infallible

[F3n67u]

What is the issue with the Fetch Standard?

https://fetch.spec.whatwg.org/#dom-body-formdata

In "The formData() method steps":

"application/x-www-form-urlencoded"

1. Let entries be the result of parsing bytes.
2. If entries is failure, then throw a TypeError.
3. Return a new FormData object whose entry list is entries.

Step 2 seems not necessary because parsing application/x-www-form-urlencoded byte sequence is infallible: https://url.spec.whatwg.org/#concept-urlencoded-parser

[annevk]

Nice find! Seems this has always been wrong: 6a9ae23. (And I checked the URL standard which got the definition from the HTML standard about twelve years ago, a move I was responsible for as well, and that never returned failure either.)