[INFO] cloning repository https://github.com/acarl123/RustUDPListener [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/acarl123/RustUDPListener" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Facarl123%2FRustUDPListener", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Facarl123%2FRustUDPListener'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] eae210b6c2a87b325c6698c68043ef2fc3b3d179 [INFO] testing acarl123/RustUDPListener against beta-2021-09-08 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Facarl123%2FRustUDPListener" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/acarl123/RustUDPListener on toolchain beta-2021-09-08 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/acarl123/RustUDPListener [INFO] finished tweaking git repo https://github.com/acarl123/RustUDPListener [INFO] tweaked toml for git repo https://github.com/acarl123/RustUDPListener written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/acarl123/RustUDPListener already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 6b4cfc8385c4dae2cd790ef8de40d76eb384aee3e47a88a392f8908e01beabc4 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "6b4cfc8385c4dae2cd790ef8de40d76eb384aee3e47a88a392f8908e01beabc4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6b4cfc8385c4dae2cd790ef8de40d76eb384aee3e47a88a392f8908e01beabc4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6b4cfc8385c4dae2cd790ef8de40d76eb384aee3e47a88a392f8908e01beabc4", kill_on_drop: false }` [INFO] [stdout] 6b4cfc8385c4dae2cd790ef8de40d76eb384aee3e47a88a392f8908e01beabc4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 0eac5581631cf6993cc4207011ede13161bc77801ec9c4cc659bb43cefcb2882 [INFO] running `Command { std: "docker" "start" "-a" "0eac5581631cf6993cc4207011ede13161bc77801ec9c4cc659bb43cefcb2882", kill_on_drop: false }` [INFO] [stderr] Compiling SocketSender v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::iter::FromIterator` [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::iter::FromIterator; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/main.rs:23:22 [INFO] [stdout] | [INFO] [stdout] 23 | let mut socket = try!(UdpSocket::bind(&bind_addr.as_str())); [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/main.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | try!(socket.send_to(buf, &src)); [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/main.rs:29:26 [INFO] [stdout] | [INFO] [stdout] 29 | let (amt, src) = try!(socket.recv_from(&mut buf)); [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | let mut socket = try!(UdpSocket::bind(&bind_addr.as_str())); [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `SocketSender` should have a snake case name [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] = help: convert the identifier to snake case: `socket_sender` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `byteArray` should have a snake case name [INFO] [stdout] --> src/main.rs:8:16 [INFO] [stdout] | [INFO] [stdout] 8 | fn int_to_char(byteArray: &[u8; 255]) -> String{ [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to snake case: `byte_array` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `newVec` should have a snake case name [INFO] [stdout] --> src/main.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | let mut newVec = Vec::new(); [INFO] [stdout] | ^^^^^^ help: convert the identifier to snake case: `new_vec` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `listenAddr` should have a snake case name [INFO] [stdout] --> src/main.rs:20:20 [INFO] [stdout] | [INFO] [stdout] 20 | fn socket_response(listenAddr: &str, listenPort: i32) -> Result<(), Error> { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to snake case: `listen_addr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `listenPort` should have a snake case name [INFO] [stdout] --> src/main.rs:20:38 [INFO] [stdout] | [INFO] [stdout] 20 | fn socket_response(listenAddr: &str, listenPort: i32) -> Result<(), Error> { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to snake case: `listen_port` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:51:5 [INFO] [stdout] | [INFO] [stdout] 51 | socket_response("0.0.0.0", 13389); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.40s [INFO] running `Command { std: "docker" "inspect" "0eac5581631cf6993cc4207011ede13161bc77801ec9c4cc659bb43cefcb2882", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0eac5581631cf6993cc4207011ede13161bc77801ec9c4cc659bb43cefcb2882", kill_on_drop: false }` [INFO] [stdout] 0eac5581631cf6993cc4207011ede13161bc77801ec9c4cc659bb43cefcb2882 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 08f6a9c97ab665f41d0433cfd695efe7b6b0f0ab56ca52558749ba1c0da861c8 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "08f6a9c97ab665f41d0433cfd695efe7b6b0f0ab56ca52558749ba1c0da861c8", kill_on_drop: false }` [INFO] [stderr] Compiling SocketSender v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::iter::FromIterator` [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::iter::FromIterator; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/main.rs:23:22 [INFO] [stdout] | [INFO] [stdout] 23 | let mut socket = try!(UdpSocket::bind(&bind_addr.as_str())); [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/main.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | try!(socket.send_to(buf, &src)); [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/main.rs:29:26 [INFO] [stdout] | [INFO] [stdout] 29 | let (amt, src) = try!(socket.recv_from(&mut buf)); [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:23:9 [INFO] [stdout] | [INFO] [stdout] 23 | let mut socket = try!(UdpSocket::bind(&bind_addr.as_str())); [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `SocketSender` should have a snake case name [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] = help: convert the identifier to snake case: `socket_sender` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `byteArray` should have a snake case name [INFO] [stdout] --> src/main.rs:8:16 [INFO] [stdout] | [INFO] [stdout] 8 | fn int_to_char(byteArray: &[u8; 255]) -> String{ [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to snake case: `byte_array` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `newVec` should have a snake case name [INFO] [stdout] --> src/main.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | let mut newVec = Vec::new(); [INFO] [stdout] | ^^^^^^ help: convert the identifier to snake case: `new_vec` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `listenAddr` should have a snake case name [INFO] [stdout] --> src/main.rs:20:20 [INFO] [stdout] | [INFO] [stdout] 20 | fn socket_response(listenAddr: &str, listenPort: i32) -> Result<(), Error> { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to snake case: `listen_addr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `listenPort` should have a snake case name [INFO] [stdout] --> src/main.rs:20:38 [INFO] [stdout] | [INFO] [stdout] 20 | fn socket_response(listenAddr: &str, listenPort: i32) -> Result<(), Error> { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to snake case: `listen_port` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:51:5 [INFO] [stdout] | [INFO] [stdout] 51 | socket_response("0.0.0.0", 13389); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.58s [INFO] running `Command { std: "docker" "inspect" "08f6a9c97ab665f41d0433cfd695efe7b6b0f0ab56ca52558749ba1c0da861c8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "08f6a9c97ab665f41d0433cfd695efe7b6b0f0ab56ca52558749ba1c0da861c8", kill_on_drop: false }` [INFO] [stdout] 08f6a9c97ab665f41d0433cfd695efe7b6b0f0ab56ca52558749ba1c0da861c8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] a830a71bcf42e724a1be6d6d24daa4e96a23fb82bb257d56f8ae712328e5ae66 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "a830a71bcf42e724a1be6d6d24daa4e96a23fb82bb257d56f8ae712328e5ae66", kill_on_drop: false }` [INFO] [stderr] warning: unused import: `std::iter::FromIterator` [INFO] [stderr] --> src/main.rs:3:5 [INFO] [stderr] | [INFO] [stderr] 3 | use std::iter::FromIterator; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stderr] --> src/main.rs:23:22 [INFO] [stderr] | [INFO] [stderr] 23 | let mut socket = try!(UdpSocket::bind(&bind_addr.as_str())); [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] [INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stderr] --> src/main.rs:38:9 [INFO] [stderr] | [INFO] [stderr] 38 | try!(socket.send_to(buf, &src)); [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stderr] --> src/main.rs:29:26 [INFO] [stderr] | [INFO] [stderr] 29 | let (amt, src) = try!(socket.recv_from(&mut buf)); [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:23:9 [INFO] [stderr] | [INFO] [stderr] 23 | let mut socket = try!(UdpSocket::bind(&bind_addr.as_str())); [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: crate `SocketSender` should have a snake case name [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] = help: convert the identifier to snake case: `socket_sender` [INFO] [stderr] [INFO] [stderr] warning: variable `byteArray` should have a snake case name [INFO] [stderr] --> src/main.rs:8:16 [INFO] [stderr] | [INFO] [stderr] 8 | fn int_to_char(byteArray: &[u8; 255]) -> String{ [INFO] [stderr] | ^^^^^^^^^ help: convert the identifier to snake case: `byte_array` [INFO] [stderr] [INFO] [stderr] warning: variable `newVec` should have a snake case name [INFO] [stderr] --> src/main.rs:10:13 [INFO] [stderr] | [INFO] [stderr] 10 | let mut newVec = Vec::new(); [INFO] [stderr] | ^^^^^^ help: convert the identifier to snake case: `new_vec` [INFO] [stderr] [INFO] [stderr] warning: variable `listenAddr` should have a snake case name [INFO] [stderr] --> src/main.rs:20:20 [INFO] [stderr] | [INFO] [stderr] 20 | fn socket_response(listenAddr: &str, listenPort: i32) -> Result<(), Error> { [INFO] [stderr] | ^^^^^^^^^^ help: convert the identifier to snake case: `listen_addr` [INFO] [stderr] [INFO] [stderr] warning: variable `listenPort` should have a snake case name [INFO] [stderr] --> src/main.rs:20:38 [INFO] [stderr] | [INFO] [stderr] 20 | fn socket_response(listenAddr: &str, listenPort: i32) -> Result<(), Error> { [INFO] [stderr] | ^^^^^^^^^^ help: convert the identifier to snake case: `listen_port` [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/main.rs:51:5 [INFO] [stderr] | [INFO] [stderr] 51 | socket_response("0.0.0.0", 13389); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: `SocketSender` (bin "SocketSender" test) generated 11 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.01s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/SocketSender-ca5a40a0d19962d2) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "a830a71bcf42e724a1be6d6d24daa4e96a23fb82bb257d56f8ae712328e5ae66", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a830a71bcf42e724a1be6d6d24daa4e96a23fb82bb257d56f8ae712328e5ae66", kill_on_drop: false }` [INFO] [stdout] a830a71bcf42e724a1be6d6d24daa4e96a23fb82bb257d56f8ae712328e5ae66