Panic when webdriver could not be reached

I'm running fantoccini with rustls and sometimes my webdriver is temporarily unavailable/too slow too respond. Currently this results in a panic when attempting to establish a connection. Before 0.21.0 this would just result in an error and let me retry. Since 0.21.0 it instantly panics with the following exception. (This is on windows, but I've seen the same on linux)

thread 'main' panicked at [user_dir]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\fantoccini-0.21.0\src\session.rs:604:17:
unexpected webdriver error; webdriver could not be reached (hyper_util): client error (Connect)
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/051478957371ee0084a7c0913941d2a8c4757bb9/library\std\src\panicking.rs:652
   1: core::panicking::panic_fmt
             at /rustc/051478957371ee0084a7c0913941d2a8c4757bb9/library\core\src\panicking.rs:72
   2: fantoccini::session::Session<hyper_rustls::connector::HttpsConnector<hyper_util::client::legacy::connect::http::HttpConnector<hyper_util::client::legacy::connect::dns::GaiResolver> > >::map_handshake_response<hyper_rustls::connector::HttpsConnector<hyper_u
             at [user_dir]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\fantoccini-0.21.0\src\session.rs:604
   3: core::ops::function::FnOnce::call_once<enum2$<core::result::Result<webdriver::response::NewSessionResponse,enum2$<fantoccini::error::NewSessionError> > > (*)(enum2$<core::result::Result<enum2$<serde_json::value::Value>,enum2$<fantoccini::error::CmdError> >
             at /rustc/051478957371ee0084a7c0913941d2a8c4757bb9\library\core\src\ops\function.rs:250
   4: futures_util::fns::impl$0::call_once<enum2$<core::result::Result<webdriver::response::NewSessionResponse,enum2$<fantoccini::error::NewSessionError> > > (*)(enum2$<core::result::Result<enum2$<serde_json::value::Value>,enum2$<fantoccini::error::CmdError> > >
             at [user_dir]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.30\src\fns.rs:15
   5: futures_util::future::future::map::impl$2::poll<enum2$<fantoccini::session::impl$2::issue::async_fn_env$0<enum2$<webdriver::command::WebDriverCommand<webdriver::command::VoidWebDriverExtensionCommand> > > >,enum2$<core::result::Result<webdriver::response::
             at [user_dir]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.30\src\future\future\map.rs:57
   6: futures_util::future::future::impl$15::poll<enum2$<fantoccini::session::impl$2::issue::async_fn_env$0<enum2$<webdriver::command::WebDriverCommand<webdriver::command::VoidWebDriverExtensionCommand> > > >,enum2$<core::result::Result<webdriver::response::NewS
             at [user_dir]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.30\src\lib.rs:91
   7: fantoccini::session::impl$5::with_capabilities_and_connector::async_fn$0<hyper_rustls::connector::HttpsConnector<hyper_util::client::legacy::connect::http::HttpConnector<hyper_util::client::legacy::connect::dns::GaiResolver> > >
             at [user_dir]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\fantoccini-0.21.0\src\session.rs:670
   8: fantoccini::client::impl$0::with_capabilities_and_connector::async_fn$0<hyper_rustls::connector::HttpsConnector<hyper_util::client::legacy::connect::http::HttpConnector<hyper_util::client::legacy::connect::dns::GaiResolver> > >
             at [user_dir]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\fantoccini-0.21.0\src\client.rs:95
   9: fantoccini::impl$1::connect::async_fn$0<hyper_rustls::connector::HttpsConnector<hyper_util::client::legacy::connect::http::HttpConnector<hyper_util::client::legacy::connect::dns::GaiResolver> > >
             at [user_dir]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\fantoccini-0.21.0\src\lib.rs:248

jonhoo / fantoccini

Panic when webdriver could not be reached #263