- **assigned_to**: Daniel Stenberg
- **Comment**:

Thanks for your report.

In this error case, do you know what 'firstfamily' is then? It seems it is something else than AF_INET ...

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** [bugs:#1377] Regression in 7.35.0 to (at least) 7.37.0 related to IPv6 (on Windows?)**
**Status:** open
**Created:** Fri May 30, 2014 08:22 PM UTC by Luke-Jr
**Last Updated:** Fri May 30, 2014 08:22 PM UTC
**Owner:** Daniel Stenberg
My software uses libcurl as its socket layer via CURLOPT_CONNECT_ONLY. One user is reporting a regression connecting to http://stratum.f2pool.com:3333 (note, this is not a HTTP server) that we have isolated to 2d435c7fb5b7691e8ca1f3052e1eb5bcd8a4ea27 (trynextip: fix build for non-IPV6 capable systems). I am building libcurl with --enable-ipv6, but strangely enough, I don't think ENABLE_IPV6 is defined anywhere (lib/curl_config.h contains /* #undef ENABLE_IPV6 */). The user in question does not have IPv6 on his (Windows XP) system, so I am guessing that somehow libcurl is simply never trying IPv4 in this case.
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