[INFO] cloning repository https://github.com/dcrankshaw/rpc-perf-tuning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dcrankshaw/rpc-perf-tuning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcrankshaw%2Frpc-perf-tuning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcrankshaw%2Frpc-perf-tuning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e55de2de36444c70e67ce20ecdbfd528eb22a3d0
[INFO] checking dcrankshaw/rpc-perf-tuning against master#96cfc75584359ae7ad11cc45968059f29e7b44b7 for pr-137728
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdcrankshaw%2Frpc-perf-tuning" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dcrankshaw/rpc-perf-tuning on toolchain 96cfc75584359ae7ad11cc45968059f29e7b44b7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dcrankshaw/rpc-perf-tuning
[INFO] finished tweaking git repo https://github.com/dcrankshaw/rpc-perf-tuning
[INFO] tweaked toml for git repo https://github.com/dcrankshaw/rpc-perf-tuning written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dcrankshaw/rpc-perf-tuning 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" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3ebd52e02bd5720c37f1dd67c08fd901b68dfe3c06ffa5163d9ea8a27c6c676
[INFO] running `Command { std: "docker" "start" "-a" "d3ebd52e02bd5720c37f1dd67c08fd901b68dfe3c06ffa5163d9ea8a27c6c676", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3ebd52e02bd5720c37f1dd67c08fd901b68dfe3c06ffa5163d9ea8a27c6c676", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3ebd52e02bd5720c37f1dd67c08fd901b68dfe3c06ffa5163d9ea8a27c6c676", kill_on_drop: false }`
[INFO] [stdout] d3ebd52e02bd5720c37f1dd67c08fd901b68dfe3c06ffa5163d9ea8a27c6c676
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+96cfc75584359ae7ad11cc45968059f29e7b44b7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7419205079f30300983a74a4a3af1b8c5a64511a85304e87d462d5138cf8aa3a
[INFO] running `Command { std: "docker" "start" "-a" "7419205079f30300983a74a4a3af1b8c5a64511a85304e87d462d5138cf8aa3a", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * src/main.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking libc v0.2.16
[INFO] [stderr]     Checking byteorder v0.4.2
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking rand v0.3.14
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking rpc-perf-tuning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/server.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/rpc.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/rpc.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/server.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         stream.flush();
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let _ = stream.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message_size_bytes`
[INFO] [stdout]   --> src/client.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let message_size_bytes = args[2].parse::<usize>().unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message_size_bytes`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SHUTDOWN_CODE` is never used
[INFO] [stdout]   --> src/client.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const SHUTDOWN_CODE: u8 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIXEDINT_CODE` is never used
[INFO] [stdout]   --> src/client.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const FIXEDINT_CODE: u8 = 1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIXEDBYTE_CODE` is never used
[INFO] [stdout]   --> src/client.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const FIXEDBYTE_CODE: u8 = 3;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARINT_CODE` is never used
[INFO] [stdout]   --> src/client.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const VARINT_CODE: u8 = 4;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARFLOAT_CODE` is never used
[INFO] [stdout]   --> src/client.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const VARFLOAT_CODE: u8 = 5;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARBYTE_CODE` is never used
[INFO] [stdout]   --> src/client.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const VARBYTE_CODE: u8 = 6;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `STRING_CODE` is never used
[INFO] [stdout]   --> src/client.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const STRING_CODE: u8 = 7;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `send_messages` is never used
[INFO] [stdout]   --> src/client.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn send_messages(num_messages: usize, message_size_bytes: usize) -> (u64, Vec<u64>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_message` is never used
[INFO] [stdout]    --> src/client.rs:157:4
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn gen_message(size: usize) -> Vec<u8> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/rpc.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/rpc.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/server.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/server.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SHUTDOWN_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const SHUTDOWN_CODE: u8 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIXEDINT_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const FIXEDINT_CODE: u8 = 1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIXEDBYTE_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const FIXEDBYTE_CODE: u8 = 3;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARINT_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const VARINT_CODE: u8 = 4;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARFLOAT_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const VARFLOAT_CODE: u8 = 5;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARBYTE_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const VARBYTE_CODE: u8 = 6;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `STRING_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const STRING_CODE: u8 = 7;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SHUTDOWN_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const SHUTDOWN_CODE: u8 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/rpc.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         stream.flush();
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let _ = stream.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIXEDINT_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const FIXEDINT_CODE: u8 = 1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIXEDBYTE_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const FIXEDBYTE_CODE: u8 = 3;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARINT_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const VARINT_CODE: u8 = 4;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARFLOAT_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const VARFLOAT_CODE: u8 = 5;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARBYTE_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const VARBYTE_CODE: u8 = 6;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `STRING_CODE` is never used
[INFO] [stdout]   --> src/rpc.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const STRING_CODE: u8 = 7;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/rpc.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |         stream.flush();
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let _ = stream.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message_size_bytes`
[INFO] [stdout]   --> src/client.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let message_size_bytes = args[2].parse::<usize>().unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message_size_bytes`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/server.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |         stream.flush();
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let _ = stream.flush();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SHUTDOWN_CODE` is never used
[INFO] [stdout]   --> src/client.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const SHUTDOWN_CODE: u8 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIXEDINT_CODE` is never used
[INFO] [stdout]   --> src/client.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const FIXEDINT_CODE: u8 = 1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FIXEDBYTE_CODE` is never used
[INFO] [stdout]   --> src/client.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const FIXEDBYTE_CODE: u8 = 3;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARINT_CODE` is never used
[INFO] [stdout]   --> src/client.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const VARINT_CODE: u8 = 4;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARFLOAT_CODE` is never used
[INFO] [stdout]   --> src/client.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const VARFLOAT_CODE: u8 = 5;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VARBYTE_CODE` is never used
[INFO] [stdout]   --> src/client.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const VARBYTE_CODE: u8 = 6;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `STRING_CODE` is never used
[INFO] [stdout]   --> src/client.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const STRING_CODE: u8 = 7;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `send_messages` is never used
[INFO] [stdout]   --> src/client.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn send_messages(num_messages: usize, message_size_bytes: usize) -> (u64, Vec<u64>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_message` is never used
[INFO] [stdout]    --> src/client.rs:157:4
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn gen_message(size: usize) -> Vec<u8> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "7419205079f30300983a74a4a3af1b8c5a64511a85304e87d462d5138cf8aa3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7419205079f30300983a74a4a3af1b8c5a64511a85304e87d462d5138cf8aa3a", kill_on_drop: false }`
[INFO] [stdout] 7419205079f30300983a74a4a3af1b8c5a64511a85304e87d462d5138cf8aa3a