Hello folks at Wikimedia :)
Edit: the reply is not empty anymore. Still you should definitely check this corner case: what is Rest API response in case of a redirect loop?
Follows the original bug report:
Wikipedia contains pages with redirects loops such as: https://it.wikipedia.org/wiki/Torre_civica_(Treviso)
In this case the not normalized title https://it.wikipedia.org/wiki/Torre_Civica_(Treviso) contains all the data, but it's never reached.
In this case the rest API fails: given the following request - https://it.wikipedia.org/api/rest_v1/page/summary/Torre_Civica_di_Treviso?redirect=true - the reply is empty.
Keep up the great work, Enrico