MW version: master
CU version: master
Go to Special:CheckUser and type a valid IP in checkuser-cidr-tool box, the checkuser-cidr-tool-links message is not rightly parsed.
From console:
mediawiki.jqueryMsg: checkuser-cidr-tool-links: Parse error at position 171 in input: {{int:checkuser-cidr-tool-links-prefix}} <span class="plainlinks">[https://www.robtex.com/ip-lookup/$1 WHOIS/RDNS]<span class="mw-checkuser-cidr-checkuser-only"> <b>•</b> [[{{#special:CheckUser}}/$1|{{int:checkuser-cidr-tool-links-checkuser}}]]</span><span class="mw-checkuser-cidr-checkuserlog-only"> <b>•</b> [[{{#special:CheckUserLog}}/$1|{{int:checkuser-cidr-tool-links-checkuserlog}}]]</span></span>