An error in a url in markdown will kill the whole page

[anton-mellit]

This lets an error (or a malicious inclusion) in a user's comment or in some other part of a page to render the whole page unusable.

To reproduce: place [](https://) in a content of a page. Or in any other part which passes through markdown. Or place any other "malformed url" in place of https://.

Observed behavior: 0 - An exception has been thrown during the rendering of a template ("Malformed URL: https://") The whole page is not shown

Expected behavior: Any graceful behavior: 1) render it as https:// or 2) render as empty space

Example: (github.com renders [](https://) as empty space)