[INFO] cloning repository https://github.com/sozu-proxy/keepalive-bench
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sozu-proxy/keepalive-bench" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsozu-proxy%2Fkeepalive-bench", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsozu-proxy%2Fkeepalive-bench'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ae1d1e142865e4b4c83f4f9a1def2470ef81e518
[INFO] checking sozu-proxy/keepalive-bench against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsozu-proxy%2Fkeepalive-bench" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sozu-proxy/keepalive-bench
[INFO] finished tweaking git repo https://github.com/sozu-proxy/keepalive-bench
[INFO] tweaked toml for git repo https://github.com/sozu-proxy/keepalive-bench written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sozu-proxy/keepalive-bench on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sozu-proxy/keepalive-bench already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cda45ebc04914af2518173995c224a495ec6511f0ef1ee58a44a4962dd4518c9
[INFO] running `Command { std: "docker" "start" "-a" "cda45ebc04914af2518173995c224a495ec6511f0ef1ee58a44a4962dd4518c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cda45ebc04914af2518173995c224a495ec6511f0ef1ee58a44a4962dd4518c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cda45ebc04914af2518173995c224a495ec6511f0ef1ee58a44a4962dd4518c9", kill_on_drop: false }`
[INFO] [stdout] cda45ebc04914af2518173995c224a495ec6511f0ef1ee58a44a4962dd4518c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80122a660a16e26dcf9e7dec88a815807ce191f775fe14ef1a5701727f6b4552
[INFO] running `Command { std: "docker" "start" "-a" "80122a660a16e26dcf9e7dec88a815807ce191f775fe14ef1a5701727f6b4552", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking libc v0.2.33
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]     Checking futures v0.1.17
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]    Compiling unicase v2.0.0
[INFO] [stderr]     Checking lazy_static v0.2.9
[INFO] [stderr]     Checking lazycell v0.5.1
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking take v0.1.0
[INFO] [stderr]     Checking smallvec v0.2.1
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking httparse v1.2.3
[INFO] [stderr]     Checking mime v0.3.5
[INFO] [stderr]     Checking iovec v0.1.1
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking bytes v0.4.5
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking rand v0.3.17
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking num_cpus v1.7.0
[INFO] [stderr]     Checking csv-core v0.1.3
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking mio v0.6.11
[INFO] [stderr]     Checking serde v1.0.19
[INFO] [stderr]     Checking percent-encoding v1.0.0
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking tokio-io v0.1.3
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking relay v0.1.0
[INFO] [stderr]     Checking futures-cpupool v0.1.7
[INFO] [stderr]     Checking tokio-core v0.1.10
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking pretty_env_logger v0.1.1
[INFO] [stderr]     Checking hyper v0.11.6 (https://github.com/hyperium/hyper#d3b19112)
[INFO] [stderr]     Checking csv v1.0.0-beta.5
[INFO] [stderr]     Checking proxy-benchmark v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `header`
[INFO] [stdout]   --> src/main.rs:20:33
[INFO] [stdout]    |
[INFO] [stdout] 20 | use hyper::{Client, Uri, Error, header};
[INFO] [stdout]    |                                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `header`
[INFO] [stdout]   --> src/main.rs:20:33
[INFO] [stdout]    |
[INFO] [stdout] 20 | use hyper::{Client, Uri, Error, header};
[INFO] [stdout]    |                                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:235:21
[INFO] [stdout]     |
[INFO] [stdout] 235 |   type Future = Box<Future<Item = TcpStream, Error = io::Error>>;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 235 |   type Future = Box<dyn Future<Item = TcpStream, Error = io::Error>>;
[INFO] [stdout]     |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:235:21
[INFO] [stdout]     |
[INFO] [stdout] 235 |   type Future = Box<Future<Item = TcpStream, Error = io::Error>>;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 235 |   type Future = Box<dyn Future<Item = TcpStream, Error = io::Error>>;
[INFO] [stdout]     |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:136:39
[INFO] [stdout]     |
[INFO] [stdout] 136 |           let port_number = if let Ok(mut port) = frontend_port.try_lock() {
[INFO] [stdout]     |                                       ----^^^^
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:173:39
[INFO] [stdout]     |
[INFO] [stdout] 173 |           let port_number = if let Ok(mut port) = frontend_port.try_lock() {
[INFO] [stdout]     |                                       ----^^^^
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:194:23
[INFO] [stdout]     |
[INFO] [stdout] 194 |             if let Ok(mut port) = frontend_port.try_lock() {
[INFO] [stdout]     |                       ----^^^^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:136:39
[INFO] [stdout]     |
[INFO] [stdout] 136 |           let port_number = if let Ok(mut port) = frontend_port.try_lock() {
[INFO] [stdout]     |                                       ----^^^^
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:173:39
[INFO] [stdout]     |
[INFO] [stdout] 173 |           let port_number = if let Ok(mut port) = frontend_port.try_lock() {
[INFO] [stdout]     |                                       ----^^^^
[INFO] [stdout]     |                                       |
[INFO] [stdout]     |                                       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:194:23
[INFO] [stdout]     |
[INFO] [stdout] 194 |             if let Ok(mut port) = frontend_port.try_lock() {
[INFO] [stdout]     |                       ----^^^^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `port`
[INFO] [stdout]    --> src/main.rs:194:23
[INFO] [stdout]     |
[INFO] [stdout] 194 |             if let Ok(mut port) = frontend_port.try_lock() {
[INFO] [stdout]     |                       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_port`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `port`
[INFO] [stdout]    --> src/main.rs:194:23
[INFO] [stdout]     |
[INFO] [stdout] 194 |             if let Ok(mut port) = frontend_port.try_lock() {
[INFO] [stdout]     |                       ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_port`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     wtr.write_record(&["time", "client", "status", "instance", "front port", "back port"]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let _ = wtr.write_record(&["time", "client", "status", "instance", "front port", "back port"]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 | /             writer.write_record(&[format!("{}", elapsed), format!("{}", id), format!("{}", status_code),
[INFO] [stdout] 170 | |               format!("{}", backend_id), port_number, format!("{}", backend_connection_port)]);
[INFO] [stdout]     | |______________________________________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 169 |             let _ = writer.write_record(&[format!("{}", elapsed), format!("{}", id), format!("{}", status_code),
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:196:15
[INFO] [stdout]     |
[INFO] [stdout] 196 | /               writer.write_record(&[format!("{}", elapsed), format!("{}", id), format!("{}", status_code),
[INFO] [stdout] 197 | |                 "".to_string(), port_number, "".to_string()]);
[INFO] [stdout]     | |_____________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 196 |               let _ = writer.write_record(&[format!("{}", elapsed), format!("{}", id), format!("{}", status_code),
[INFO] [stdout]     |               +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:218:9
[INFO] [stdout]     |
[INFO] [stdout] 218 | /         writer.write_record(&[format!("{}", elapsed), format!("{}", id2), format!("{}", e),
[INFO] [stdout] 219 | |           "".to_string(), "".to_string(), "".to_string()]);
[INFO] [stdout]     | |__________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 218 |         let _ = writer.write_record(&[format!("{}", elapsed), format!("{}", id2), format!("{}", e),
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     wtr.write_record(&["time", "client", "status", "instance", "front port", "back port"]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let _ = wtr.write_record(&["time", "client", "status", "instance", "front port", "back port"]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 | /             writer.write_record(&[format!("{}", elapsed), format!("{}", id), format!("{}", status_code),
[INFO] [stdout] 170 | |               format!("{}", backend_id), port_number, format!("{}", backend_connection_port)]);
[INFO] [stdout]     | |______________________________________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 169 |             let _ = writer.write_record(&[format!("{}", elapsed), format!("{}", id), format!("{}", status_code),
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:196:15
[INFO] [stdout]     |
[INFO] [stdout] 196 | /               writer.write_record(&[format!("{}", elapsed), format!("{}", id), format!("{}", status_code),
[INFO] [stdout] 197 | |                 "".to_string(), port_number, "".to_string()]);
[INFO] [stdout]     | |_____________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 196 |               let _ = writer.write_record(&[format!("{}", elapsed), format!("{}", id), format!("{}", status_code),
[INFO] [stdout]     |               +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:218:9
[INFO] [stdout]     |
[INFO] [stdout] 218 | /         writer.write_record(&[format!("{}", elapsed), format!("{}", id2), format!("{}", e),
[INFO] [stdout] 219 | |           "".to_string(), "".to_string(), "".to_string()]);
[INFO] [stdout]     | |__________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 218 |         let _ = writer.write_record(&[format!("{}", elapsed), format!("{}", id2), format!("{}", e),
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.12s
[INFO] running `Command { std: "docker" "inspect" "80122a660a16e26dcf9e7dec88a815807ce191f775fe14ef1a5701727f6b4552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80122a660a16e26dcf9e7dec88a815807ce191f775fe14ef1a5701727f6b4552", kill_on_drop: false }`
[INFO] [stdout] 80122a660a16e26dcf9e7dec88a815807ce191f775fe14ef1a5701727f6b4552
