Steps to replicate the issue (include links if applicable):
What happens?:
A message that says the user account is not registered is displayed.
What should have happened instead?:
The message should not be displayed; the user's user page, talk page and contributions, if any, should be displayed.
Only the user mentioned in the description is affected, so I am speculating that it is something related to the characters Ị and ị (Ị and ị).
Possible same issue as T346594 (which seems a NFC-normalized Unicode problem)
"warnings": {
"users": {
"*": "The value passed for \"ususers\" contains invalid or non-normalized data. Textual data should be valid, NFC-normalized Unicode without C0 control characters other than HT (\\t), LF (\\n), and CR (\\r)."
}
},
"query": {
"users": [
{
"name": "\u1eca\u0250s\u0250\u029e-n\u028esn\u028e",
"missing": ""
}
]
}https://ja.wikipedia.org/w/api.php?action=query&list=users&ususerids=2131751&uselang=en
"query": {
"users": [
{
"userid": 2131751,
"name": "\u1eca\u0250s\u0250\u029e-n\u028esn\u028e"
}
]
}