When an index performs a bogus redirect or otherwise returns a different
distribution name than expected, uv currently hangs.
In the example case, requesting the simple index page for any package
returns the page for anyio. This mean querying the sniffio version map
returns only anyio entries, and the version maps resolves to an anyio
version. When the resolver makes a query for sniffio and waits for it to
resolve, the main thread finds an anyio and resolves only that in the
wait map, causing the hang.
We fix this by checking the name of the returned distribution against
the name of the requested distribution. For good measure, we add the
same check in `Request::Dist` and `Request::Installed`. For performance
and complexity reasons, we don't perform this check in the version map
itself, but only after a candidate distribution has been selected.
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Co-authored-by: Zanie Blue <contact@zanie.dev>
konsti
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