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RESTBase error 500 on a specific page on ko.wp: Wikimedia\Assert\InvariantException
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When trying to view https://ko.wikipedia.org/api/rest_v1/page/html/위키백과%3A사랑방_(기술)/27308256?redirect=false&stash=true , I see the following:

image.png (2×3 px, 1 MB)

{"type":"https://mediawiki.org/wiki/HyperSwitch/errors/unknown_error","method":"get","detail":"<!DOCTYPE html>\n<html class=\"client-nojs\" lang=\"ko\" dir=\"ltr\">\n<head>\n<meta charset=\"UTF-8\"/>\n<title>내부 오류 - 위키백과, 우리 모두의 백과사전</title>\n<script>document.documentElement.className=\"client-js\";RLCONF={\"wgBreakFrames\":!0,\"wgSeparatorTransformTable\":[\"\",\"\"],\"wgDigitTransformTable\":[\"\",\"\"],\"wgDefaultDateFormat\":\"ko\",\"wgMonthNames\":[\"\",\"1월\",\"2월\",\"3월\",\"4월\",\"5월\",\"6월\",\"7월\",\"8월\",\"9월\",\"10월\",\"11월\",\"12월\"],\"wgRequestId\":\"273a078c-443f-4f20-89d5-27573832d909\",\"wgCSPNonce\":!1,\"wgCanonicalNamespace\":\"Special\",\"wgCanonicalSpecialPageName\":\"Badtitle\",\"wgNamespaceNumber\":-1,\"wgPageName\":\"특수:Badtitle/rest.php\",\"wgTitle\":\"Badtitle/rest.php\",\"wgCurRevisionId\":0,\"wgRevisionId\":0,\"wgArticleId\":0,\"wgIsArticle\":!1,\"wgIsRedirect\":!1,\"wgAction\":\"view\",\"wgUserName\":null,\"wgUserGroups\":[\"*\"],\"wgCategories\":[],\"wgPageContentLanguage\":\"ko\",\"wgPageContentModel\":\"wikitext\",\"wgRelevantPageName\":\"특수:Badtitle/rest.php\",\"wgRelevantArticleId\":0,\"wgIsProbablyEditable\":!1,\"wgRelevantPageIsProbablyEditable\":!1,\"wgMediaViewerOnClick\":!0,\"wgMediaViewerEnabledByDefault\":!0,\"wgPopupsReferencePreviews\":!1,\n\"wgPopupsConflictsWithNavPopupGadget\":!1,\"wgVisualEditor\":{\"pageLanguageCode\":\"ko\",\"pageLanguageDir\":\"ltr\",\"pageVariantFallbacks\":\"ko\"},\"wgMFDisplayWikibaseDescriptions\":{\"search\":!0,\"nearby\":!0,\"watchlist\":!0,\"tagline\":!0},\"wgWMESchemaEditAttemptStepOversample\":!1,\"wgULSCurrentAutonym\":\"한국어\",\"wgNoticeProject\":\"wikipedia\",\"wgCentralAuthMobileDomain\":!1,\"wgEditSubmitButtonLabelPublish\":!0,\"wgULSPosition\":\"interlanguage\",\"wgGENewcomerTasksGuidanceEnabled\":!0};RLSTATE={\"ext.globalCssJs.user.styles\":\"ready\",\"site.styles\":\"ready\",\"noscript\":\"ready\",\"user.styles\":\"ready\",\"ext.globalCssJs.user\":\"ready\",\"user\":\"ready\",\"user.options\":\"loading\",\"skins.vector.styles.legacy\":\"ready\",\"ext.visualEditor.desktopArticleTarget.noscript\":\"ready\",\"ext.uls.interlanguage\":\"ready\",\"ext.wikimediaBadges\":\"ready\"};RLPAGEMODULES=[\"site\",\"mediawiki.page.startup\",\"mediawiki.page.ready\",\"skins.vector.legacy.js\",\"ext.gadget.directcommons\",\"ext.gadget.ReferenceTooltips\",\n\"ext.gadget.refToolbar\",\"ext.gadget.siteNotice\",\"ext.gadget.CollapsibleSidebar\",\"ext.gadget.scrollUpButton\",\"ext.centralauth.centralautologin\",\"ext.popups\",\"ext.visualEditor.desktopArticleTarget.init\",\"ext.visualEditor.targetLoader\",\"ext.eventLogging\",\"ext.wikimediaEvents\",\"ext.navigationTiming\",\"ext.uls.compactlinks\",\"ext.uls.interface\",\"ext.cx.eventlogging.campaigns\",\"ext.centralNotice.geoIP\",\"ext.growthExperiments.SuggestedEditSession\"];</script>\n<script>(RLQ=window.RLQ||[]).push(function(){mw.loader.implement(\"user.options@1hzgi\",function($,jQuery,require,module){/*@nomin*/mw.user.tokens.set({\"patrolToken\":\"+\\\\\",\"watchToken\":\"+\\\\\",\"csrfToken\":\"+\\\\\"});mw.user.options.set({\"variant\":\"ko\"});\n});});</script>\n<link rel=\"stylesheet\" href=\"/w/load.php?lang=ko&amp;modules=ext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cskins.vector.styles.legacy&amp;only=styles&amp;skin=vector\"/>\n<script async=\"\" src=\"/w/load.php?lang=ko&amp;modules=startup&amp;only=scripts&amp;raw=1&amp;skin=vector\"></script>\n<meta name=\"ResourceLoaderDynamicStyles\" content=\"\"/>\n<link rel=\"stylesheet\" href=\"/w/load.php?lang=ko&amp;modules=site.styles&amp;only=styles&amp;skin=vector\"/>\n<meta name=\"generator\" content=\"MediaWiki 1.36.0-wmf.3\"/>\n<meta name=\"referrer\" content=\"origin\"/>\n<meta name=\"referrer\" content=\"origin-when-crossorigin\"/>\n<meta name=\"referrer\" content=\"origin-when-cross-origin\"/>\n<meta name=\"robots\" content=\"noindex,nofollow\"/>\n<link rel=\"alternate\" media=\"only screen and (max-width: 720px)\" href=\"//ko.m.wikipedia.org/wiki/%ED%8A%B9%EC%88%98:Badtitle/rest.php\"/>\n<link rel=\"apple-touch-icon\" href=\"/static/apple-touch/wikipedia.png\"/>\n<link rel=\"shortcut icon\" href=\"/static/favicon/wikipedia.ico\"/>\n<link rel=\"search\" type=\"application/opensearchdescription+xml\" href=\"/w/opensearch_desc.php\" title=\"위키백과 (ko)\"/>\n<link rel=\"EditURI\" type=\"application/rsd+xml\" href=\"//ko.wikipedia.org/w/api.php?action=rsd\"/>\n<link rel=\"license\" href=\"//creativecommons.org/licenses/by-sa/3.0/\"/>\n<link rel=\"canonical\" href=\"https://ko.wikipedia.org/w/rest.php/ko.wikipedia.org/v3/page/pagebundle/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC%3A%EC%82%AC%EB%9E%91%EB%B0%A9_(%EA%B8%B0%EC%88%A0)/27308256\"/>\n<link rel=\"dns-prefetch\" href=\"//login.wikimedia.org\"/>\n</head>\n<body class=\"mediawiki ltr sitedir-ltr mw-hide-empty-elt ns--1 ns-special mw-special-Badtitle page-특수_Badtitle_rest_php rootpage-특수_Badtitle_rest_php skin-vector action-view skin-vector-legacy\"><div id=\"mw-page-base\" class=\"noprint\"></div>\n<div id=\"mw-head-base\" class=\"noprint\"></div>\n<div id=\"content\" class=\"mw-body\" role=\"main\">\n\t<a id=\"top\"></a>\n\t<div id=\"siteNotice\" class=\"mw-body-content\"><!-- CentralNotice --></div>\n\t<div class=\"mw-indicators mw-body-content\">\n\t</div>\n\t<h1 id=\"firstHeading\" class=\"firstHeading\" lang=\"ko\">내부 오류</h1>\n\t<div id=\"bodyContent\" class=\"mw-body-content\">\n\t\t\n\t\t<div id=\"contentSub\"></div>\n\t\t<div id=\"contentSub2\"></div>\n\t\t\n\t\t<div id=\"jump-to-nav\"></div>\n\t\t<a class=\"mw-jump-link\" href=\"#mw-head\">둘러보기로 가기</a>\n\t\t<a class=\"mw-jump-link\" href=\"#searchInput\">검색하러 가기</a>\n\t\t<div id=\"mw-content-text\"><div class=\"errorbox mw-content-ltr\">[273a078c-443f-4f20-89d5-27573832d909] 2020-08-11 17:37:12: 종류 &quot;Wikimedia\\Assert\\InvariantException&quot;에서 심각한 오류</div>\n<!-- Set $wgShowExceptionDetails = true; at the bottom\nof LocalSettings.php to show detailed debugging\ninformation. --><noscript><img src=\"//ko.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=1x1\" alt=\"\" title=\"\" width=\"1\" height=\"1\" style=\"border: none; position: absolute;\" /></noscript>\n<div class=\"printfooter\">원본 주소 \"<a dir=\"ltr\" href=\"https://ko.wikipedia.org/wiki/특수:Badtitle/rest.php\">https://ko.wikipedia.org/wiki/특수:Badtitle/rest.php</a>\"</div></div>\n\t\t<div id=\"catlinks\" class=\"catlinks catlinks-allhidden\" data-mw=\"interface\"></div>\n\t</div>\n</div>\n<div id='mw-data-after-content'>\n\t<div class=\"read-more-container\"></div>\n</div>\n\n<div id=\"mw-navigation\">\n\t<h2>둘러보기 메뉴</h2>\n\t<div id=\"mw-head\">\n\t\t<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-personal\" class=\"vector-menu\" aria-labelledby=\"p-personal-label\" role=\"navigation\" \n\t >\n\t<h3 id=\"p-personal-label\">\n\t\t<span>개인 도구</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"vector-menu-content-list\"><li id=\"pt-anonuserpage\">로그인하지 않음</li><li id=\"pt-anontalk\"><a href=\"/wiki/%ED%8A%B9%EC%88%98:%EB%82%B4%EC%82%AC%EC%9A%A9%EC%9E%90%ED%86%A0%EB%A1%A0\" title=\"현재 사용하는 IP 주소에 대한 토론 문서 [n]\" accesskey=\"n\">토론</a></li><li id=\"pt-anoncontribs\"><a href=\"/wiki/%ED%8A%B9%EC%88%98:%EB%82%B4%EA%B8%B0%EC%97%AC\" title=\"이 IP 주소의 편집 목록 [y]\" accesskey=\"y\">기여</a></li><li id=\"pt-createaccount\"><a href=\"/w/index.php?title=%ED%8A%B9%EC%88%98:%EA%B3%84%EC%A0%95%EB%A7%8C%EB%93%A4%EA%B8%B0&amp;returnto=%ED%8A%B9%EC%88%98%3ABadtitle%2Frest.php\" title=\"계정을 만들고 로그인하는 것이 좋습니다; 하지만, 필수는 아닙니다\">계정 만들기</a></li><li id=\"pt-login\"><a href=\"/w/index.php?title=%ED%8A%B9%EC%88%98:%EB%A1%9C%EA%B7%B8%EC%9D%B8&amp;returnto=%ED%8A%B9%EC%88%98%3ABadtitle%2Frest.php\" title=\"위키백과에 로그인하면 여러가지 편리한 기능을 사용할 수 있습니다. [o]\" accesskey=\"o\">로그인</a></li></ul>\n\t\t\n\t</div>\n</nav>\n\n\t\t<div id=\"left-navigation\">\n\t\t\t<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-namespaces\" class=\"vector-menu vector-menu-tabs vectorTabs\" aria-labelledby=\"p-namespaces-label\" role=\"navigation\" \n\t >\n\t<h3 id=\"p-namespaces-label\">\n\t\t<span>이름공간</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"vector-menu-content-list\"><li id=\"ca-nstab-special\" class=\"selected\"><a href=\"/w/rest.php/ko.wikipedia.org/v3/page/pagebundle/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC%3A%EC%82%AC%EB%9E%91%EB%B0%A9_(%EA%B8%B0%EC%88%A0)/27308256\" title=\"이 문서는 특수 문서로, 편집할 수 없습니다\">특수 문서</a></li></ul>\n\t\t\n\t</div>\n</nav>\n\n\t\t\t<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-variants\" class=\"vector-menu-empty emptyPortlet vector-menu vector-menu-dropdown vectorMenu\" aria-labelledby=\"p-variants-label\" role=\"navigation\" \n\t >\n\t<input type=\"checkbox\" class=\"vector-menu-checkbox vectorMenuCheckbox\" aria-labelledby=\"p-variants-label\" />\n\t<h3 id=\"p-variants-label\">\n\t\t<span>변수</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"menu vector-menu-content-list\"></ul>\n\t\t\n\t</div>\n</nav>\n\n\t\t</div>\n\t\t<div id=\"right-navigation\">\n\t\t\t<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-views\" class=\"vector-menu-empty emptyPortlet vector-menu vector-menu-tabs vectorTabs\" aria-labelledby=\"p-views-label\" role=\"navigation\" \n\t >\n\t<h3 id=\"p-views-label\">\n\t\t<span>보기</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"vector-menu-content-list\"></ul>\n\t\t\n\t</div>\n</nav>\n\n\t\t\t<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-cactions\" class=\"vector-menu-empty emptyPortlet vector-menu vector-menu-dropdown vectorMenu\" aria-labelledby=\"p-cactions-label\" role=\"navigation\" \n\t >\n\t<input type=\"checkbox\" class=\"vector-menu-checkbox vectorMenuCheckbox\" aria-labelledby=\"p-cactions-label\" />\n\t<h3 id=\"p-cactions-label\">\n\t\t<span>더 보기</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"menu vector-menu-content-list\"></ul>\n\t\t\n\t</div>\n</nav>\n\n\t\t\t<div id=\"p-search\" role=\"search\">\n\t<h3 >\n\t\t<label for=\"searchInput\">검색</label>\n\t</h3>\n\t<form action=\"/w/index.php\" id=\"searchform\">\n\t\t<div id=\"simpleSearch\">\n\t\t\t<input type=\"search\" name=\"search\" placeholder=\"위키백과 검색\" title=\"위키백과 검색 [f]\" accesskey=\"f\" id=\"searchInput\"/>\n\t\t\t<input type=\"hidden\" name=\"title\" value=\"특수:검색\">\n\t\t\t<input type=\"submit\" name=\"fulltext\" value=\"검색\" title=\"이 문자열이 포함된 문서 검색\" id=\"mw-searchButton\" class=\"searchButton mw-fallbackSearchButton\"/>\n\t\t\t<input type=\"submit\" name=\"go\" value=\"보기\" title=\"이 이름의 문서가 존재하면 그 문서로 바로 가기\" id=\"searchButton\" class=\"searchButton\"/>\n\t\t</div>\n\t</form>\n</div>\n\n\t\t</div>\n\t</div>\n\t\n<div id=\"mw-panel\">\n\t<div id=\"p-logo\" role=\"banner\">\n\t\t<a  title=\"대문으로 가기\" class=\"mw-wiki-logo\" href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EB%8C%80%EB%AC%B8\"></a>\n\t</div>\n\t<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-navigation\" class=\"vector-menu vector-menu-portal portal portal-first\" aria-labelledby=\"p-navigation-label\" role=\"navigation\" \n\t >\n\t<h3 id=\"p-navigation-label\">\n\t\t<span>둘러보기</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"vector-menu-content-list\"><li id=\"n-mainpage-description\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EB%8C%80%EB%AC%B8\" title=\"대문으로 가기 [z]\" accesskey=\"z\">대문</a></li><li id=\"n-recentchanges\"><a href=\"/wiki/%ED%8A%B9%EC%88%98:%EC%B5%9C%EA%B7%BC%EB%B0%94%EB%80%9C\" title=\"위키의 최근 바뀐 목록 [r]\" accesskey=\"r\">최근 바뀜</a></li><li id=\"n-currentevents\"><a href=\"/wiki/%ED%8F%AC%ED%84%B8:%EC%9A%94%EC%A6%98_%ED%99%94%EC%A0%9C\" title=\"최근의 소식 알아 보기\">요즘 화제</a></li><li id=\"n-randompage\"><a href=\"/wiki/%ED%8A%B9%EC%88%98:%EC%9E%84%EC%9D%98%EB%AC%B8%EC%84%9C\" title=\"무작위로 선택된 문서 불러오기 [x]\" accesskey=\"x\">임의의 문서로</a></li><li id=\"n-sitesupport\"><a href=\"//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&amp;utm_medium=sidebar&amp;utm_campaign=C13_ko.wikipedia.org&amp;uselang=ko\" title=\"지원을 기다립니다\">기부</a></li></ul>\n\t\t\n\t</div>\n</nav>\n\n\t<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-사용자 모임\" class=\"vector-menu vector-menu-portal portal\" aria-labelledby=\"p-사용자 모임-label\" role=\"navigation\" \n\t >\n\t<h3 id=\"p-사용자 모임-label\">\n\t\t<span>사용자 모임</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"vector-menu-content-list\"><li id=\"n-projectchat\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EC%82%AC%EB%9E%91%EB%B0%A9\">사랑방</a></li><li id=\"n-portal\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EC%82%AC%EC%9A%A9%EC%9E%90_%EB%AA%A8%EC%9E%84\" title=\"위키백과 참여자를 위한 토론/대화 공간입니다.\">사용자 모임</a></li><li id=\"n-request\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EC%9A%94%EC%B2%AD\">관리 요청</a></li></ul>\n\t\t\n\t</div>\n</nav>\n<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-편집 안내\" class=\"vector-menu vector-menu-portal portal\" aria-labelledby=\"p-편집 안내-label\" role=\"navigation\" \n\t >\n\t<h3 id=\"p-편집 안내-label\">\n\t\t<span>편집 안내</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"vector-menu-content-list\"><li id=\"n-help\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EB%8F%84%EC%9B%80%EB%A7%90\" title=\"도움말\">도움말</a></li><li id=\"n-policy\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EC%A0%95%EC%B1%85%EA%B3%BC_%EC%A7%80%EC%B9%A8\">정책과 지침</a></li><li id=\"n-qna\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EC%A7%88%EB%AC%B8%EB%B0%A9\">질문방</a></li></ul>\n\t\t\n\t</div>\n</nav>\n<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-tb\" class=\"vector-menu vector-menu-portal portal\" aria-labelledby=\"p-tb-label\" role=\"navigation\" \n\t >\n\t<h3 id=\"p-tb-label\">\n\t\t<span>도구</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"vector-menu-content-list\"><li id=\"t-upload\"><a href=\"/wiki/위키백과:파일_올리기\" title=\"파일 올리기 [u]\" accesskey=\"u\">파일 올리기</a></li><li id=\"t-specialpages\"><a href=\"/wiki/%ED%8A%B9%EC%88%98:%ED%8A%B9%EC%88%98%EB%AC%B8%EC%84%9C\" title=\"모든 특수 문서의 목록 [q]\" accesskey=\"q\">특수 문서 목록</a></li><li id=\"t-print\"><a href=\"javascript:print();\" rel=\"alternate\" title=\"이 문서의 인쇄용 판 [p]\" accesskey=\"p\">인쇄용 판</a></li></ul>\n\t\t\n\t</div>\n</nav>\n\n\t<!-- Please do not use role attribute as CSS selector, it is deprecated. -->\n<nav id=\"p-lang\" class=\"vector-menu vector-menu-portal portal\" aria-labelledby=\"p-lang-label\" role=\"navigation\" \n\t >\n\t<h3 id=\"p-lang-label\">\n\t\t<span>다른 언어</span>\n\t</h3>\n\t<!-- Please do not use the .body class, it is deprecated. -->\n\t<div class=\"body vector-menu-content\">\n\t\t<!-- Please do not use the .menu class, it is deprecated. -->\n\t\t<ul class=\"vector-menu-content-list\"></ul>\n\t\t<div class=\"after-portlet after-portlet-lang\"><span class=\"uls-after-portlet-link\"></span></div>\n\t</div>\n</nav>\n\n</div>\n\n</div>\n\n<footer id=\"footer\" class=\"mw-footer\" role=\"contentinfo\" >\n\t<ul id=\"footer-info\" >\n\t</ul>\n\t<ul id=\"footer-places\" >\n\t\t<li id=\"footer-places-privacy\"><a href=\"https://foundation.wikimedia.org/wiki/Privacy_policy\" class=\"extiw\" title=\"wmf:Privacy policy\">개인정보처리방침</a></li>\n\t\t<li id=\"footer-places-about\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EC%86%8C%EA%B0%9C\" title=\"위키백과:소개\">위키백과 소개</a></li>\n\t\t<li id=\"footer-places-disclaimer\"><a href=\"/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EB%A9%B4%EC%B1%85_%EC%A1%B0%ED%95%AD\" title=\"위키백과:면책 조항\">면책 조항</a></li>\n\t\t<li id=\"footer-places-developers\"><a href=\"https://www.mediawiki.org/wiki/Special:MyLanguage/How_to_contribute\">개발자</a></li>\n\t\t<li id=\"footer-places-statslink\"><a href=\"https://stats.wikimedia.org/#/ko.wikipedia.org\">통계</a></li>\n\t\t<li id=\"footer-places-cookiestatement\"><a href=\"https://foundation.wikimedia.org/wiki/Cookie_statement\">쿠키 정책</a></li>\n\t\t<li id=\"footer-places-mobileview\"><a href=\"//ko.m.wikipedia.org/w/index.php?title=%ED%8A%B9%EC%88%98:Badtitle/rest.php&amp;mobileaction=toggle_view_mobile\" class=\"noprint stopMobileRedirectToggle\">모바일 보기</a></li>\n\t</ul>\n\t<ul id=\"footer-icons\" class=\"noprint\">\n\t\t<li id=\"footer-copyrightico\"><a href=\"https://wikimediafoundation.org/\"><img src=\"/static/images/footer/wikimedia-button.png\" srcset=\"/static/images/footer/wikimedia-button-1.5x.png 1.5x, /static/images/footer/wikimedia-button-2x.png 2x\" width=\"88\" height=\"31\" alt=\"Wikimedia Foundation\" loading=\"lazy\" /></a></li>\n\t\t<li id=\"footer-poweredbyico\"><a href=\"https://www.mediawiki.org/\"><img src=\"/static/images/footer/poweredby_mediawiki_88x31.png\" alt=\"Powered by MediaWiki\" srcset=\"/static/images/footer/poweredby_mediawiki_132x47.png 1.5x, /static/images/footer/poweredby_mediawiki_176x62.png 2x\" width=\"88\" height=\"31\" loading=\"lazy\"/></a></li>\n\t</ul>\n\t<div style=\"clear: both;\"></div>\n</footer>\n\n\n<script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({\"wgBackendResponseTime\":1272,\"wgHostname\":\"wtp1028\"});});</script>\n</body></html>","uri":"/ko.wikipedia.org/v1/page/html/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC%3A%EC%82%AC%EB%9E%91%EB%B0%A9_(%EA%B8%B0%EC%88%A0)/27308256"}

Something is terribly wrong about this error output, but the important part is: [92487bfb-f1b2-4762-8315-1122da3e6c15] 2020-08-11 17:34:43: 종류 &quot;Wikimedia\\Assert\\InvariantException&quot;

Event Timeline

(adding DiscussionTools because this is the same page as in bug T259653, so we can't verify that it is fixed)

Backtrace: https://logstash.wikimedia.org/app/kibana#/doc/logstash-*/logstash-deploy-2020.08.11/mediawiki?id=AXPelq9kMQ_08tQaGECN&_g=h@a98e110

[92487bfb-f1b2-4762-8315-1122da3e6c15] /w/rest.php/ko.wikipedia.org/v3/page/pagebundle/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC%3A%EC%82%AC%EB%9E%91%EB%B0%A9_(%EA%B8%B0%EC%88%A0)/27308256   Wikimedia\Assert\InvariantException from line 224 of /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/assert/src/Assert.php: Invariant failed: Bad UTF-8 at start of string
#0 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Utils/PHPUtils.php(192): Wikimedia\Assert\Assert::invariant(boolean, string)
#1 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/PP/Processors/WrapSections.php(29): Wikimedia\Parsoid\Utils\PHPUtils::safeSubstr(string, integer, integer)
#2 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/PP/Processors/WrapSections.php(384): Wikimedia\Parsoid\Wt2Html\PP\Processors\WrapSections->getSrc(Wikimedia\Parsoid\Wt2Html\PageConfigFrame, integer, integer)
#3 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/PP/Processors/WrapSections.php(450): Wikimedia\Parsoid\Wt2Html\PP\Processors\WrapSections->resolveTplExtSectionConflicts(array)
#4 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/DOMPostProcessor.php(157): Wikimedia\Parsoid\Wt2Html\PP\Processors\WrapSections->run(Wikimedia\Parsoid\Config\Env, DOMElement, array, boolean)
#5 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/DOMPostProcessor.php(847): Wikimedia\Parsoid\Wt2Html\DOMPostProcessor->Wikimedia\Parsoid\Wt2Html\{closure}(DOMElement, array, boolean)
#6 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/DOMPostProcessor.php(896): Wikimedia\Parsoid\Wt2Html\DOMPostProcessor->doPostProcess(DOMDocument)
#7 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/DOMPostProcessor.php(913): Wikimedia\Parsoid\Wt2Html\DOMPostProcessor->process(DOMDocument)
#8 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipeline.php(152): Wikimedia\Parsoid\Wt2Html\DOMPostProcessor->processChunkily(string, array)
#9 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipeline.php(202): Wikimedia\Parsoid\Wt2Html\ParserPipeline->parseChunkily(string, array)
#10 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Wt2Html/ParserPipelineFactory.php(299): Wikimedia\Parsoid\Wt2Html\ParserPipeline->parseToplevelDoc(string, array)
#11 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Core/WikitextContentModelHandler.php(78): Wikimedia\Parsoid\Wt2Html\ParserPipelineFactory->parse(string)
#12 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Parsoid.php(152): Wikimedia\Parsoid\Core\WikitextContentModelHandler->toDOM(Wikimedia\Parsoid\Config\Env)
#13 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/src/Parsoid.php(184): Wikimedia\Parsoid\Parsoid->parseWikitext(MWParsoid\Config\PageConfig, array)
#14 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/extension/src/Rest/Handler/ParsoidHandler.php(572): Wikimedia\Parsoid\Parsoid->wikitext2html(MWParsoid\Config\PageConfig, array, NULL)
#15 /srv/mediawiki/php-1.36.0-wmf.3/vendor/wikimedia/parsoid/extension/src/Rest/Handler/PageHandler.php(90): MWParsoid\Rest\Handler\ParsoidHandler->wt2html(MWParsoid\Config\PageConfig, array)
#16 /srv/mediawiki/php-1.36.0-wmf.3/includes/Rest/Router.php(365): MWParsoid\Rest\Handler\PageHandler->execute()
#17 /srv/mediawiki/php-1.36.0-wmf.3/includes/Rest/Router.php(320): MediaWiki\Rest\Router->executeHandler(MWParsoid\Rest\Handler\PageHandler)
#18 /srv/mediawiki/php-1.36.0-wmf.3/includes/Rest/EntryPoint.php(133): MediaWiki\Rest\Router->execute(MediaWiki\Rest\RequestFromGlobals)
#19 /srv/mediawiki/php-1.36.0-wmf.3/includes/Rest/EntryPoint.php(100): MediaWiki\Rest\EntryPoint->execute()
#20 /srv/mediawiki/php-1.36.0-wmf.3/rest.php(31): MediaWiki\Rest\EntryPoint::main()
#21 /srv/mediawiki/w/rest.php(3): require(string)
#22 {main}