Caused by the regex used by the inlineUrl method. https://github.com/erusev/parsedown/blob/1ff038273949df7d6a455352659a878f3c89b29c/Parsedown.php#L1540

if (strpos($Excerpt['context'], 'http') !== false
    and preg_match('/\bhttps?+:[\/]{2}[^\s<]+\b\/*+/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE)                                                          
)

The regex fail is the boundery " is not followd by a whitespace. href="…"> fail, while href="" > works.

Fail: https://regex101.com/r/kabj3Q/1

Possible fix

https://regex101.com/r/5h5eLe/1

/\bhttps?+:[\/]{2}[^\s<"]+\b\/*+/ui'
                       ^ Adding a " here

It is possible that the other regular expressions for the links also have such a problem … just uncovered.

side note, the textarea needs a nice monospace font, to enable the reporter to place some markings to the right position :-)

Hello Damien, I am sorry for being so silent for so long. Other issues in my life need my attention.

I gave my word that I would take responsibility for this part, and that still stands.

You can ping me on any reated issue, such as 0036438.

Do we still want the result of https://regex101.com/r/5h5eLe/1 (screenshot above parsedown-html-anchor-fix.png)?

sorry for being so silent for so long. Other issues in my life need my attention

Hello, no worries - trust me I know what it's like...
To be honest I even forgot about this issue, because I almost never paste HTML links, I generally just use plain URLs or markdown ;-)

Do we still want the result of https://regex101.com/r/5h5eLe/1

Yes, I believe this is the correct rendering.

My name is Stefan :)

PR https://github.com/mantisbt/mantisbt/pull/2296

Well met Stefan :-)

Thanks for the PR.

Since this bug is reproducible in plain Parsedown if Safe Mode or Escape Markup are enabled (of course URL links must be ON as well), independently from your proposed patch as demonstrated by the code snippet below, I think I'll report it upstream too, so when it's fixed we can remove the override of inlineUrl() method.

include 'Parsedown.php';
$p = new Parsedown;
$p->setUrlsLinked(true);
$p->setSafeMode(true); // OR $p->setMarkupEscaped(true);
echo $p->text('<a href="http://example.com">link</a>');
// <p><a href="<a href="http://example.com">link">http://example.com">link</a></a></p>
// Expected:
//  <p><a href="<a href="http://example.com">http://example.com</a>">link</a></p>