107 ENOTCONN Transport endpoint is not connected

[jiacai2050]

My project use rouille as http server, and it panic with following stacktrace today.
I can't understand why remote_addr is invalid here, and I can't reproduce this by myself.

From my point of view, after (client, addr) = sock.accept() , ENOTCONN won't happend on client, if then other end disconnect, we will get Broken pipe for write and Connection reset by peer for read.
Is there anything I'm missing?

 2020-09-03 16:59:35.794 ERRO [src/engine/util/mod.rs:171] thread '<unnamed>' panicked 'called `Result::unwrap()` on an `Err` value: Os { code: 107, kind: NotConnected, message: "Transport endpoint is
 not connected" }' at "/root/.cargo/registry/src/gitlab.example.com-bfbf2811318eff5d/tiny_http-0.6.2/src/client.rs:157"
stack backtrace:
   0:     0x560b76f094ad - backtrace::backtrace::libunwind::trace::h1dfc5d5f86da629a
                        at /root/.cargo/registry/src/gitlab.example.com-bfbf2811318eff5d/backtrace-0.2.3/src/backtrace/libunwind.rs:54
                         - backtrace::backtrace::trace::h6cebca1075b8eb4b
                        at /root/.cargo/registry/src/gitlab.example.com-bfbf2811318eff5d/backtrace-0.2.3/src/backtrace/mod.rs:70
   1:     0x560b76f08b02 - backtrace::capture::Backtrace::new::h1a1970034c6045ed
                        at /app/ceresbase/target/release/build/backtrace-0d10531d76a2c814/out/capture.rs:79
                         - <backtrace::capture::Backtrace as core::default::Default>::default::h63f59b9329434b56
                        at /app/ceresbase/target/release/build/backtrace-0d10531d76a2c814/out/capture.rs:187
   2:     0x560b76d7ee52 - ceresbase::engine::util::set_exit_hook::{{closure}}::hcaeca03c7ca0b6a1
                        at src/engine/util/mod.rs:170
   3:     0x560b7796d95c - std::panicking::rust_panic_with_hook::hb7ad5693188bdb00
                        at src/libstd/panicking.rs:476
   4:     0x560b7796d46f - rust_begin_unwind
                        at src/libstd/panicking.rs:380
   5:     0x560b7798c2d0 - core::panicking::panic_fmt::hb1f3e14b86a3520c
                        at src/libcore/panicking.rs:85
   6:     0x560b7798c0d2 - core::option::expect_none_failed::he6711468044f7162
                        at src/libcore/option.rs:1199
   7:     0x560b778cd1be - core::result::Result<T,E>::unwrap::h38e5fad2ca27e032
                        at /rustc/b8cedc00407a4c56a3bda1ed605c6fc166655447/src/libcore/result.rs:963
                         - tiny_http::client::ClientConnection::read::ha911ed308c506847
                        at /root/.cargo/registry/src/gitlab.example.com-bfbf2811318eff5d/tiny_http-0.6.2/src/client.rs:157
                         - <tiny_http::client::ClientConnection as core::iter::traits::iterator::Iterator>::next::h0c9e303d0acc2c69
                        at /root/.cargo/registry/src/gitlab.example.com-bfbf2811318eff5d/tiny_http-0.6.2/src/client.rs:185
   8:     0x560b76e18220 - tiny_http::Server::new::{{closure}}::{{closure}}::hecf4c099fd41f08c
                        at /root/.cargo/registry/src/gitlab.example.com-bfbf2811318eff5d/tiny_http-0.6.2/src/lib.rs:330
   9:     0x560b778be5dc - <alloc::boxed::Box<F> as core::ops::function::FnMut<A>>::call_mut::hfc46fcd7349e6a65
                        at /rustc/b8cedc00407a4c56a3bda1ed605c6fc166655447/src/liballoc/boxed.rs:1022
                         - tiny_http::util::task_pool::TaskPool::add_thread::{{closure}}::h3a885c7fe2bf99c0
                        at /root/.cargo/registry/src/gitlab.example.com-bfbf2811318eff5d/tiny_http-0.6.2/src/util/task_pool.rs:141
                         - std::sys_common::backtrace::__rust_begin_short_backtrace::hebe78f87f91cc17f
                        at /rustc/b8cedc00407a4c56a3bda1ed605c6fc166655447/src/libstd/sys_common/backtrace.rs:129
  10:     0x560b778bf76b - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h403781e55d5a497c
                        at /rustc/b8cedc00407a4c56a3bda1ed605c6fc166655447/src/libstd/thread/mod.rs:475
                         - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hedd9d183b4614ebe
                        at /rustc/b8cedc00407a4c56a3bda1ed605c6fc166655447/src/libstd/panic.rs:318
                         - std::panicking::try::do_call::h8d6671340e951ac2
                        at /rustc/b8cedc00407a4c56a3bda1ed605c6fc166655447/src/libstd/panicking.rs:305
  11:     0x560b779737d6 - __rust_maybe_catch_panic
                        at src/libpanic_unwind/lib.rs:86
  12:     0x560b778b556e - std::panicking::try::h753244e51df72843