Module talk:Flag

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User:Le Deluge has reported a bug at Template talk:Flagicon: when function "icon" of Module:Flag is invoked, incorrect Category:Flagicon with missing country data templates is used. Correct category should be Category:Flagicons with missing country data templates. This is caused by concatenation of parameter "name" passed to function "_main", which is 'Flagicon' in the function "icon". Here's a fix: Special:Diff/965603747/967883637. There is probably a more conventional way of doing this in Lua. Of course, another solution would be to rename the Category:Flagicons with missing country data templates itself (and change wikitext in {{Flagicon}}). —⁠andrybak (talk) 22:25, 15 July 2020 (UTC)[reply]

Possible new category name could be Category:Pages using flagicon template with missing country data—most popular naming scheme under Category:Unknown parameters. —⁠andrybak (talk) 22:36, 15 July 2020 (UTC)[reply]

Side note: function "deco" does not have the same issue, because Template:Flagdeco uses tracking Category:Flagdeco with missing country data templates. —⁠andrybak (talk) 22:39, 15 July 2020 (UTC)[reply]

As I mentioned over on T:Flagicon, it's wanting other non-existent categories such as Category:Flag with missing country data templates and I've just noticed Category:Flagcountry with missing country data templates. Le Deluge (talk) 22:59, 15 July 2020 (UTC)[reply]

Le Deluge, as far as I can tell, these two categories are not referenced from other places, only from this module. So just creating them should be enough. —⁠andrybak (talk) 23:27, 15 July 2020 (UTC)[reply]

 Done --Ahecht (TALK
PAGE) 07:22, 16 July 2020 (UTC)[reply]

I have added {{Preview warning}} to the error category assignment, but it displays the template invocation as plain text. See the PDCFlag example on the test cases page. I have left this for now, figuring that an error message is better than nothing, but if someone could get the template to render, that would be helpful. – Jonesey95 (talk) 14:21, 14 September 2025 (UTC)[reply]