I encountered this panic making a request using reqwest with the Tokio runtime. This seems to be an UB caughted by the new precondition assertions.
thread 'main' panicked at library\core\src\panicking.rs:156:5:
unsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`
stack backtrace:
0: std::panicking::begin_panic_handler
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\std\src\panicking.rs:645
1: core::panicking::panic_nounwind_fmt::runtime
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\core\src\panicking.rs:110
2: core::panicking::panic_nounwind_fmt
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\core\src\panicking.rs:123
3: core::panicking::panic_nounwind
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\core\src\panicking.rs:156
4: core::slice::raw::from_raw_parts::precondition_check
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\intrinsics.rs:2799
5: core::slice::raw::from_raw_parts<u8>
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\slice\raw.rs:98
6: schannel::context_buffer::impl$1::deref
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\schannel-0.1.20\src\context_buffer.rs:20
7: schannel::tls_stream::TlsStream<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >::step_initialize<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\schannel-0.1.20\src\tls_stream.rs:579
8: schannel::tls_stream::TlsStream<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >::initialize<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\schannel-0.1.20\src\tls_stream.rs:655
9: schannel::tls_stream::MidHandshakeTlsStream<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >::handshake<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\schannel-0.1.20\src\tls_stream.rs:972
10: native_tls::imp::MidHandshakeTlsStream<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >::handshake<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\native-tls-0.2.11\src\imp\schannel.rs:206
11: native_tls::MidHandshakeTlsStream<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >::handshake<tokio_native_tls::AllowStd<tokio::net::tcp::stream::TcpStream> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\native-tls-0.2.11\src\lib.rs:255
12: tokio_native_tls::impl$18::poll<tokio::net::tcp::stream::TcpStream>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-native-tls-0.3.1\src\lib.rs:366
13: tokio_native_tls::handshake::async_fn$0<tokio_native_tls::impl$12::connect::async_fn$0::closure_env$0<tokio::net::tcp::stream::TcpStream>,tokio::net::tcp::stream::TcpStream>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-native-tls-0.3.1\src\lib.rs:255
14: tokio_native_tls::impl$12::connect::async_fn$0<tokio::net::tcp::stream::TcpStream>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-native-tls-0.3.1\src\lib.rs:311
15: hyper_tls::client::impl$5::call::async_block$1<hyper::client::connect::http::HttpConnector<reqwest::dns::resolve::DynResolver> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\hyper-tls-0.5.0\src\client.rs:138
16: core::future::future::impl$1::poll<alloc::boxed::Box<dyn$<core::future::future::Future<assoc$<Output,enum2$<core::result::Result<enum2$<hyper_tls::stream::MaybeHttpsStream<tokio::net::tcp::stream::TcpStream> >,alloc::boxed::Box<dyn$<core::error::Error,cor
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\future\future.rs:123
17: hyper_tls::client::impl$6::poll<tokio::net::tcp::stream::TcpStream>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\hyper-tls-0.5.0\src\client.rs:162
18: reqwest::connect::impl$0::connect_with_maybe_proxy::async_fn$0
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\reqwest-0.11.22\src\connect.rs:258
19: reqwest::connect::with_timeout::async_fn$0<reqwest::connect::Conn,enum2$<reqwest::connect::impl$0::connect_with_maybe_proxy::async_fn_env$0> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\reqwest-0.11.22\src\connect.rs:432
20: core::future::future::impl$1::poll<alloc::boxed::Box<dyn$<core::future::future::Future<assoc$<Output,enum2$<core::result::Result<reqwest::connect::Conn,alloc::boxed::Box<dyn$<core::error::Error,core::marker::Send,core::marker::Sync>,alloc::alloc::Global>
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\future\future.rs:123
21: hyper::service::oneshot::impl$0::poll<reqwest::connect::Connector,http::uri::Uri>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\hyper-0.14.26\src\service\oneshot.rs:60
22: futures_core::future::impl$2::try_poll<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,reqwest::connect::Conn,alloc::boxed::Box<dyn$<core::error::Error,core::marker::Send,core::marker::Sync>,alloc::alloc::Global> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-core-0.3.28\src\future.rs:82
23: futures_util::future::try_future::into_future::impl$2::poll<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\future\try_future\into_future.rs:34
24: futures_util::future::future::map::impl$2::poll<futures_util::future::try_future::into_future::IntoFuture<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri> >,futures_util::fns::MapErrFn<hyper::error::Error (*)(alloc::boxed::Box<
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\future\future\map.rs:55
25: futures_util::future::future::impl$15::poll<futures_util::future::try_future::into_future::IntoFuture<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri> >,futures_util::fns::MapErrFn<hyper::error::Error (*)(alloc::boxed::Box<dyn$
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\lib.rs:91
26: futures_util::future::try_future::impl$61::poll<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed::Box<dyn$<core::error::Error,core::marker::Send,core::marker::Sync>,alloc::alloc::Global>)>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\lib.rs:91
27: futures_core::future::impl$2::try_poll<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed::Box<dyn$<core::error::Error,core::marker::Send,core::marker:
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-core-0.3.28\src\future.rs:82
28: futures_util::future::try_future::into_future::impl$2::poll<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed::Box<dyn$<core::error::Error,core::marke
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\future\try_future\into_future.rs:34
29: futures_util::future::future::map::impl$2::poll<futures_util::future::try_future::into_future::IntoFuture<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\future\future\map.rs:55
30: futures_util::future::future::impl$15::poll<futures_util::future::try_future::into_future::IntoFuture<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxe
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\lib.rs:91
31: futures_util::future::try_future::impl$56::poll<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed::Box<dyn$<core::error::Error,core::marker::Send,core
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\lib.rs:91
32: futures_core::future::impl$2::try_poll<futures_util::future::try_future::MapOk<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed::Box<dyn$<core::error
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-core-0.3.28\src\future.rs:82
33: futures_util::future::try_future::try_flatten::impl$2::poll<futures_util::future::try_future::MapOk<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed:
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\future\try_future\try_flatten.rs:49
34: futures_util::future::try_future::impl$4::poll<futures_util::future::try_future::MapOk<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed::Box<dyn$<cor
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\lib.rs:91
35: futures_util::future::try_future::impl$26::poll<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed::Box<dyn$<core::error::Error,core::marker::Send,core
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\lib.rs:91
36: futures_util::future::either::impl$4::poll<futures_util::future::try_future::AndThen<futures_util::future::try_future::MapErr<hyper::service::oneshot::Oneshot<reqwest::connect::Connector,http::uri::Uri>,hyper::error::Error (*)(alloc::boxed::Box<dyn$<core:
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\future\either.rs:109
37: hyper::common::lazy::impl$1::poll<hyper::client::client::impl$3::connect_to::closure_env$0<reqwest::connect::Connector,reqwest::async_impl::body::ImplStream>,enum2$<futures_util::future::either::Either<futures_util::future::try_future::AndThen<futures_uti
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\hyper-0.14.26\src\common\lazy.rs:62
38: futures_util::future::future::FutureExt::poll_unpin<hyper::common::lazy::Lazy<hyper::client::client::impl$3::connect_to::closure_env$0<reqwest::connect::Connector,reqwest::async_impl::body::ImplStream>,enum2$<futures_util::future::either::Either<futures_u
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\future\future\mod.rs:562
39: futures_util::future::select::impl$1::poll<hyper::client::pool::Checkout<hyper::client::client::PoolClient<reqwest::async_impl::body::ImplStream> >,hyper::common::lazy::Lazy<hyper::client::client::impl$3::connect_to::closure_env$0<reqwest::connect::Connec
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\futures-util-0.3.28\src\future\select.rs:118
40: hyper::client::client::impl$3::connection_for::async_fn$0<reqwest::connect::Connector,reqwest::async_impl::body::ImplStream>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\hyper-0.14.26\src\client\client.rs:368
41: hyper::client::client::impl$3::send_request::async_fn$0<reqwest::connect::Connector,reqwest::async_impl::body::ImplStream>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\hyper-0.14.26\src\client\client.rs:236
42: hyper::client::client::impl$3::retryably_send_request::async_fn$0<reqwest::connect::Connector,reqwest::async_impl::body::ImplStream>
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\hyper-0.14.26\src\client\client.rs:206
43: hyper::client::client::impl$10::poll
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\hyper-0.14.26\src\client\client.rs:623
44: reqwest::async_impl::client::impl$13::poll
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\reqwest-0.11.22\src\async_impl\client.rs:2263
45: reqwest::async_impl::client::impl$12::poll
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\reqwest-0.11.22\src\async_impl\client.rs:2241
46: cli::auth::get_github_user::async_fn$0
at .\src\auth.rs:128
47: cli::auth::impl$2::is_expired::async_fn$0
at .\src\auth.rs:143
48: cli::auth::impl$8::maybe_refresh_token::async_fn$0
at .\src\auth.rs:578
49: cli::auth::impl$8::get_credential::async_fn$0
at .\src\auth.rs:508
50: cli::auth::impl$8::get_tunnel_authentication::async_fn$0
at .\src\auth.rs:447
51: cli::auth::impl$18::get_authorization::async_block$0
at .\src\auth.rs:810
52: core::future::future::impl$1::poll<alloc::boxed::Box<dyn$<core::future::future::Future<assoc$<Output,enum2$<core::result::Result<enum2$<tunnels::management::authorization::Authorization>,enum2$<tunnels::management::errors::HttpError> > > > >,core::marker:
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\future\future.rs:123
53: tunnels::management::http_client::impl$0::make_request::async_fn$0
at C:\Users\conno\.cargo\git\checkouts\dev-tunnels-99bcc8e49562bf97\8cae9b2\rs\src\management\http_client.rs:474
54: tunnels::management::http_client::impl$0::make_tunnel_request::async_fn$0
at C:\Users\conno\.cargo\git\checkouts\dev-tunnels-99bcc8e49562bf97\8cae9b2\rs\src\management\http_client.rs:433
55: tunnels::management::http_client::impl$0::get_tunnel::async_fn$0
at C:\Users\conno\.cargo\git\checkouts\dev-tunnels-99bcc8e49562bf97\8cae9b2\rs\src\management\http_client.rs:92
56: opentelemetry_api::trace::context::impl$4::poll<enum2$<tunnels::management::http_client::impl$0::get_tunnel::async_fn_env$0> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\opentelemetry_api-0.19.0\src\trace\context.rs:373
57: cli::tunnels::dev_tunnels::impl$4::get_or_create_tunnel::async_fn$0
at .\src\tunnels\dev_tunnels.rs:443
58: cli::tunnels::dev_tunnels::impl$4::start_new_launcher_tunnel::async_fn$0
at .\src\tunnels\dev_tunnels.rs:484
59: cli::commands::tunnels::serve_with_csa::async_fn$0::closure$3
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-1.28.2\src\macros\select.rs:524
60: tokio::future::poll_fn::impl$1::poll<enum2$<cli::commands::tunnels::serve_with_csa::async_fn$0::__tokio_select_util::Out<enum2$<core::result::Result<cli::tunnels::dev_tunnels::ActiveTunnel,enum2$<cli::util::errors::AnyError> > >,enum2$<core::result::Resul
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-1.28.2\src\future\poll_fn.rs:58
61: cli::commands::tunnels::serve_with_csa::async_fn$0
at .\src\commands\tunnels.rs:602
62: cli::commands::tunnels::serve::async_fn$0
at .\src\commands\tunnels.rs:419
63: code::main::async_block$0
at .\src\bin\code\main.rs:124
64: tokio::runtime::park::impl$4::block_on::closure$0<enum2$<code::main::async_block_env$0> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-1.28.2\src\runtime\park.rs:283
65: tokio::runtime::coop::with_budget
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-1.28.2\src\runtime\coop.rs:107
66: tokio::runtime::coop::budget
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-1.28.2\src\runtime\coop.rs:73
67: tokio::runtime::park::CachedParkThread::block_on<enum2$<code::main::async_block_env$0> >
69: tokio::runtime::scheduler::multi_thread::MultiThread::block_on<enum2$<code::main::async_block_env$0> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-1.28.2\src\runtime\scheduler\multi_thread\mod.rs:66
70: tokio::runtime::runtime::Runtime::block_on<enum2$<code::main::async_block_env$0> >
at C:\Users\conno\.cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-1.28.2\src\runtime\runtime.rs:304
71: code::main
at .\src\bin\code\main.rs:129
72: core::ops::function::FnOnce::call_once<enum2$<core::result::Result<tuple$<>,enum2$<core::convert::Infallible> > > (*)(),tuple$<> >
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\ops\function.rs:250
73: core::hint::black_box
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\hint.rs:337