JavaScript Syntax Error

[1994rstefan]

If you user HTML-Comments to hide JavaScript for browsers that do not support JavaScript, the closing HTML-Comment-Tag have to be a JavaScript-Comment

So instead of this Code:
<script type="text/javascript">
<!--
[some JavaScript]
-->
</script>
You should use
<script type="text/javascript">
<!--
[some JavaScript]
-->
</script>
Otherwise some Browsers will fail because of invalid JavaScript.
This is also descriped on w3schools (​http://www.w3schools.com/tags/tag_comment.asp)

This error can be found in:
wp-includes/file.php on line 980
wp-includes/media.php on line 2075

[1994rstefan]

Sorry, the Bug-Tracker escapes a double slash, it should say (without space):

<script type="text/javascript">
<!--
[some JavaScript]
/ / -->
</script>

[ocean90]

No, it's valid.

Duplicate: #23952

Related: #18788