[INFO] cloning repository https://github.com/northpole79/tcp_comms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/northpole79/tcp_comms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnorthpole79%2Ftcp_comms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnorthpole79%2Ftcp_comms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a943d47b88f905bf6ebe20c3d69d0308969d5739
[INFO] testing northpole79/tcp_comms against try#015dbcea68b7642e2acc268b5c8f3e9086fc02ff for pr-102570-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnorthpole79%2Ftcp_comms" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/northpole79/tcp_comms on toolchain 015dbcea68b7642e2acc268b5c8f3e9086fc02ff
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/northpole79/tcp_comms
[INFO] finished tweaking git repo https://github.com/northpole79/tcp_comms
[INFO] tweaked toml for git repo https://github.com/northpole79/tcp_comms written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ffa00592f466da0f45c96fd595cf49335f48302e3514128aadbffc043df52223
[INFO] running `Command { std: "docker" "start" "-a" "ffa00592f466da0f45c96fd595cf49335f48302e3514128aadbffc043df52223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffa00592f466da0f45c96fd595cf49335f48302e3514128aadbffc043df52223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffa00592f466da0f45c96fd595cf49335f48302e3514128aadbffc043df52223", kill_on_drop: false }`
[INFO] [stdout] ffa00592f466da0f45c96fd595cf49335f48302e3514128aadbffc043df52223
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cd9309dd8877dac8b15d7476c89934c74b68e4762e814938d3de3768afcb7c6
[INFO] running `Command { std: "docker" "start" "-a" "3cd9309dd8877dac8b15d7476c89934c74b68e4762e814938d3de3768afcb7c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling tcp_comms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> src/server.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "3cd9309dd8877dac8b15d7476c89934c74b68e4762e814938d3de3768afcb7c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cd9309dd8877dac8b15d7476c89934c74b68e4762e814938d3de3768afcb7c6", kill_on_drop: false }`
[INFO] [stdout] 3cd9309dd8877dac8b15d7476c89934c74b68e4762e814938d3de3768afcb7c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25c17c67dcd5c7d97b2dca6ee996e8b2776618f46880b74d0ec45bf44f6a2d88
[INFO] running `Command { std: "docker" "start" "-a" "25c17c67dcd5c7d97b2dca6ee996e8b2776618f46880b74d0ec45bf44f6a2d88", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> src/server.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tcp_comms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> src/server.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "25c17c67dcd5c7d97b2dca6ee996e8b2776618f46880b74d0ec45bf44f6a2d88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25c17c67dcd5c7d97b2dca6ee996e8b2776618f46880b74d0ec45bf44f6a2d88", kill_on_drop: false }`
[INFO] [stdout] 25c17c67dcd5c7d97b2dca6ee996e8b2776618f46880b74d0ec45bf44f6a2d88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+015dbcea68b7642e2acc268b5c8f3e9086fc02ff" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0682b380b145e52c2c1167c31a1de10605f549126f3e8539872ef57d6cd5712b
[INFO] running `Command { std: "docker" "start" "-a" "0682b380b145e52c2c1167c31a1de10605f549126f3e8539872ef57d6cd5712b", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Arc`, `Mutex`
[INFO] [stderr]  --> src/server.rs:6:17
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::sync::{Arc, Mutex};
[INFO] [stderr]   |                 ^^^  ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tcp_comms` (lib) generated 1 warning (run `cargo fix --lib -p tcp_comms` to apply 1 suggestion)
[INFO] [stderr] warning: `tcp_comms` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tcp_comms-e6778098f45c506b)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test unit_tests::it_works ... ok
[INFO] [stdout] test unit_tests::network_works ... ok
[INFO] [stdout] test unit_tests::comm_works ... ok
[INFO] [stdout] test unit_tests::server_works ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- unit_tests::server_works stdout ----
[INFO] [stdout] thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 98, kind: AddrInUse, message: "Address already in use" }', src/server.rs:39:56
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x564c182314a0 - std::backtrace_rs::backtrace::libunwind::trace::hecb21857e99d889d
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x564c182314a0 - std::backtrace_rs::backtrace::trace_unsynchronized::h390569d291d382e6
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x564c182314a0 - std::sys_common::backtrace::_print_fmt::he268a904f7419e52
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x564c182314a0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hedbee76c21719161
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x564c1825530e - core::fmt::write::hd7abf800172f9326
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/fmt/mod.rs:1209:17
[INFO] [stdout]    5:     0x564c1822c5f5 - std::io::Write::write_fmt::hce65cc88c775e9d3
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/io/mod.rs:1682:15
[INFO] [stdout]    6:     0x564c18231265 - std::sys_common::backtrace::_print::he1bf0c0215d8eb21
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x564c18231265 - std::sys_common::backtrace::print::h1d63cc8fb6910f4d
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x564c182330df - std::panicking::default_hook::{{closure}}::h06165285990169e4
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:267:22
[INFO] [stdout]    9:     0x564c18232d9e - std::panicking::default_hook::hc8c52a6a2d770858
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:283:9
[INFO] [stdout]   10:     0x564c18203ac7 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h9bfd099cb89cb0bb
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2032:9
[INFO] [stdout]   11:     0x564c18203ac7 - test::test_main::{{closure}}::h065ae2c9be25dce8
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/test/src/lib.rs:135:21
[INFO] [stdout]   12:     0x564c182337fd - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6aaf80b277f5611a
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2032:9
[INFO] [stdout]   13:     0x564c182337fd - std::panicking::rust_panic_with_hook::h4b7f78aa6e886a78
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:692:13
[INFO] [stdout]   14:     0x564c18233577 - std::panicking::begin_panic_handler::{{closure}}::h8c929b88c5c37601
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:579:13
[INFO] [stdout]   15:     0x564c1823194c - std::sys_common::backtrace::__rust_end_short_backtrace::h61d4e5f81197e3cc
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stdout]   16:     0x564c18233292 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:575:5
[INFO] [stdout]   17:     0x564c181b98c3 - core::panicking::panic_fmt::hd23e6f8c5d094f51
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/panicking.rs:65:14
[INFO] [stdout]   18:     0x564c181b9b23 - core::result::unwrap_failed::ha5a9f6c1da51066d
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/result.rs:1791:5
[INFO] [stdout]   19:     0x564c181c0b6b - core::result::Result<T,E>::unwrap::h800f4b15f34f3758
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/result.rs:1113:23
[INFO] [stdout]   20:     0x564c181cabef - tcp_comms::server::handle_accept::h46ad54ee2ceddb0e
[INFO] [stdout]                                at /opt/rustwide/workdir/src/server.rs:39:20
[INFO] [stdout]   21:     0x564c181cab83 - tcp_comms::server::start::{{closure}}::he1a701c75a35b467
[INFO] [stdout]                                at /opt/rustwide/workdir/src/server.rs:32:9
[INFO] [stdout]   22:     0x564c181d2743 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha69e64420305f56d
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:121:18
[INFO] [stdout]   23:     0x564c181ced03 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h302964956a66ac51
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/thread/mod.rs:551:17
[INFO] [stdout]   24:     0x564c181bf9b3 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h10d58b66a18fd720
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   25:     0x564c181c62e5 - std::panicking::try::do_call::h585688ab30e045d0
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:483:40
[INFO] [stdout]   26:     0x564c181c730b - __rust_try
[INFO] [stdout]   27:     0x564c181c611b - std::panicking::try::h316707854b77161b
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:447:19
[INFO] [stdout]   28:     0x564c181cbf73 - std::panic::catch_unwind::hcb4aaac551c0da49
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panic.rs:137:14
[INFO] [stdout]   29:     0x564c181ceb25 - std::thread::Builder::spawn_unchecked_::{{closure}}::hbd94dc615132de72
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/thread/mod.rs:550:30
[INFO] [stdout]   30:     0x564c181cf19e - core::ops::function::FnOnce::call_once{{vtable.shim}}::h1f1e3937548420c2
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/ops/function.rs:510:5
[INFO] [stdout]   31:     0x564c18237c13 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5676ec8835469d88
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2000:9
[INFO] [stdout]   32:     0x564c18237c13 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8aa650efc9f4a6ec
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2000:9
[INFO] [stdout]   33:     0x564c18237c13 - std::sys::unix::thread::Thread::new::thread_start::h8e214f29f03a09ce
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   34:     0x7f835f405609 - start_thread
[INFO] [stdout]   35:     0x7f835f1d5133 - clone
[INFO] [stdout]   36:                0x0 - <unknown>
[INFO] [stdout] thread 'unit_tests::server_works' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 111, kind: ConnectionRefused, message: "Connection refused" }', src/unit_tests.rs:39:60
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x564c182314a0 - std::backtrace_rs::backtrace::libunwind::trace::hecb21857e99d889d
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x564c182314a0 - std::backtrace_rs::backtrace::trace_unsynchronized::h390569d291d382e6
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x564c182314a0 - std::sys_common::backtrace::_print_fmt::he268a904f7419e52
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x564c182314a0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hedbee76c21719161
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x564c1825530e - core::fmt::write::hd7abf800172f9326
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/fmt/mod.rs:1209:17
[INFO] [stdout]    5:     0x564c1822c5f5 - std::io::Write::write_fmt::hce65cc88c775e9d3
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/io/mod.rs:1682:15
[INFO] [stdout]    6:     0x564c18231265 - std::sys_common::backtrace::_print::he1bf0c0215d8eb21
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x564c18231265 - std::sys_common::backtrace::print::h1d63cc8fb6910f4d
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x564c182330df - std::panicking::default_hook::{{closure}}::h06165285990169e4
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:267:22
[INFO] [stdout]    9:     0x564c18232d9e - std::panicking::default_hook::hc8c52a6a2d770858
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:283:9
[INFO] [stdout]   10:     0x564c18203ac7 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h9bfd099cb89cb0bb
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2032:9
[INFO] [stdout]   11:     0x564c18203ac7 - test::test_main::{{closure}}::h065ae2c9be25dce8
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/test/src/lib.rs:135:21
[INFO] [stdout]   12:     0x564c182337fd - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6aaf80b277f5611a
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2032:9
[INFO] [stdout]   13:     0x564c182337fd - std::panicking::rust_panic_with_hook::h4b7f78aa6e886a78
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:692:13
[INFO] [stdout]   14:     0x564c18233577 - std::panicking::begin_panic_handler::{{closure}}::h8c929b88c5c37601
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:579:13
[INFO] [stdout]   15:     0x564c1823194c - std::sys_common::backtrace::__rust_end_short_backtrace::h61d4e5f81197e3cc
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:137:18
[INFO] [stdout]   16:     0x564c18233292 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:575:5
[INFO] [stdout]   17:     0x564c181b98c3 - core::panicking::panic_fmt::hd23e6f8c5d094f51
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/panicking.rs:65:14
[INFO] [stdout]   18:     0x564c181b9b23 - core::result::unwrap_failed::ha5a9f6c1da51066d
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/result.rs:1791:5
[INFO] [stdout]   19:     0x564c181c0d1b - core::result::Result<T,E>::unwrap::hd02f92e394de8d7e
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/result.rs:1113:23
[INFO] [stdout]   20:     0x564c181c4cd9 - tcp_comms::unit_tests::server_works::h651b5a4a4ca4415c
[INFO] [stdout]                                at /opt/rustwide/workdir/src/unit_tests.rs:39:23
[INFO] [stdout]   21:     0x564c181c4c07 - tcp_comms::unit_tests::server_works::{{closure}}::h83d539d274647b03
[INFO] [stdout]                                at /opt/rustwide/workdir/src/unit_tests.rs:36:1
[INFO] [stdout]   22:     0x564c181cf285 - core::ops::function::FnOnce::call_once::h5b98d7ce2702a501
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/ops/function.rs:510:5
[INFO] [stdout]   23:     0x564c18208e3f - core::ops::function::FnOnce::call_once::h2f93ceb28cb0c61c
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/ops/function.rs:510:5
[INFO] [stdout]   24:     0x564c18208e3f - test::__rust_begin_short_backtrace::hdd721a0e8ee25a0e
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/test/src/lib.rs:637:18
[INFO] [stdout]   25:     0x564c181da3cc - test::run_test::{{closure}}::h95fe25ef5b9cf584
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/test/src/lib.rs:628:30
[INFO] [stdout]   26:     0x564c181da3cc - core::ops::function::FnOnce::call_once{{vtable.shim}}::he3685b1dad984a5a
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/ops/function.rs:510:5
[INFO] [stdout]   27:     0x564c18207df8 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h301cae15faf66265
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2000:9
[INFO] [stdout]   28:     0x564c18207df8 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb7be0f46463c4091
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   29:     0x564c18207df8 - std::panicking::try::do_call::he80e1dd13c6c4b2c
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:483:40
[INFO] [stdout]   30:     0x564c18207df8 - std::panicking::try::h88563fd695098a44
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:447:19
[INFO] [stdout]   31:     0x564c18207df8 - std::panic::catch_unwind::h6a5b06a8b67964f8
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panic.rs:137:14
[INFO] [stdout]   32:     0x564c18207df8 - test::run_test_in_process::h3bfa2ac051e33645
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/test/src/lib.rs:660:27
[INFO] [stdout]   33:     0x564c18207df8 - test::run_test::run_test_inner::{{closure}}::h505cc84ec623ff60
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/test/src/lib.rs:554:39
[INFO] [stdout]   34:     0x564c181d4b54 - test::run_test::run_test_inner::{{closure}}::h0e58a333959ca1c3
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/test/src/lib.rs:581:37
[INFO] [stdout]   35:     0x564c181d4b54 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha224c611b967d9b5
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys_common/backtrace.rs:121:18
[INFO] [stdout]   36:     0x564c181da455 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h90e5d573525d2948
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/thread/mod.rs:551:17
[INFO] [stdout]   37:     0x564c181da455 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9d1846f6c9999fe4
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   38:     0x564c181da455 - std::panicking::try::do_call::h5ffdfcc148e40205
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:483:40
[INFO] [stdout]   39:     0x564c181da455 - std::panicking::try::hc1b1f6044948b131
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panicking.rs:447:19
[INFO] [stdout]   40:     0x564c181da455 - std::panic::catch_unwind::he641636e80f82a6d
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/panic.rs:137:14
[INFO] [stdout]   41:     0x564c181da455 - std::thread::Builder::spawn_unchecked_::{{closure}}::hdbdfe56cb03b1da6
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/thread/mod.rs:550:30
[INFO] [stdout]   42:     0x564c181da455 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hea0273674710a4a3
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/core/src/ops/function.rs:510:5
[INFO] [stdout]   43:     0x564c18237c13 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5676ec8835469d88
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2000:9
[INFO] [stdout]   44:     0x564c18237c13 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8aa650efc9f4a6ec
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/alloc/src/boxed.rs:2000:9
[INFO] [stdout]   45:     0x564c18237c13 - std::sys::unix::thread::Thread::new::thread_start::h8e214f29f03a09ce
[INFO] [stdout]                                at /rustc/015dbcea68b7642e2acc268b5c8f3e9086fc02ff/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   46:     0x7f835f405609 - start_thread
[INFO] [stdout]   47:     0x7f835f1d5133 - clone
[INFO] [stdout]   48:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     unit_tests::server_works
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 3 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.50s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "0682b380b145e52c2c1167c31a1de10605f549126f3e8539872ef57d6cd5712b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0682b380b145e52c2c1167c31a1de10605f549126f3e8539872ef57d6cd5712b", kill_on_drop: false }`
[INFO] [stdout] 0682b380b145e52c2c1167c31a1de10605f549126f3e8539872ef57d6cd5712b