In the following script: https://fr.wiktionary.org/w/index.php?title=Utilisateur:Automatik/test.js&oldid=18725117&action=edit, CodeEditor says there is just 1 warning on the page. However, if I click on the error symbol below the edit window, I've the text: "Warning: Too many errors. (39% scanned)."
So, none error is explained, I just know there are "too many errors". Usually, all errors are explained.