Broken paging for a certain plugin search query

[SergeyBiryukov]

1. Go to ​https://wordpress.org/plugins/.
2. Search for "plugin version" (without the quotes). The URL is https://wordpress.org/plugins/search.php?q=plugin+version.
3. Click "Page 2" link in the navigation menu.
4. The connection is aborted, and you get a "This site can’t be reached" (ERR_SPDY_PROTOCOL_ERROR) message in Chrome or "Secure Connection Failed" in Firefox.
5. Go back to step 2 and search for "plugin version" again. There's a Keyword/Author/Tag dropdown, so the resulting URL is https://wordpress.org/plugins/search.php?type=term&q=plugin+version (note the added type=term that was not there in the first query).
6. The paging works as expected now.

Seems like some security rule is erroneously triggered on step 4.

[dd32]

Just noting this can be reproduced from the command line:

$ curl -v 'https://wordpress.org/plugins/search.php?page=2&q=plugin'
*   Trying 66.155.40.250...
* Connected to wordpress.org (127.0.0.1) port 443 (#0)
* TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate: *.wordpress.org
* Server certificate: Go Daddy Secure Certificate Authority - G2
* Server certificate: Go Daddy Root Certificate Authority - G2
> GET /plugins/search.php?page=2&q=plugin HTTP/1.1
> Host: wordpress.org
> User-Agent: curl/7.43.0
> Accept: */*
>
* Empty reply from server
* Connection #0 to host wordpress.org left intact
curl: (52) Empty reply from server

[dd32]

Searches starting with "plugin" had been explicitly blocked, although was supposed to have been returning a proper error.
The block has now been lifted.