DXR will be turned off on Tuesday, December 29th. It will redirect to Searchfox.
See the announcement on Discourse.

DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

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<!-- Test adjustment of negative stop positions in a repeating radial gradient.
     We should still get a repeating pattern, i.e., the stops cannot
     naively be mapped to 0. -->
<div style="background: repeating-radial-gradient(closest-side, black -100px, black -50px, white -50px, white 0); width: 400px; height: 400px;"></div>