[INFO] cloning repository https://github.com/bellrd/rust-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bellrd/rust-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbellrd%2Frust-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbellrd%2Frust-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 752fbad1e72f7f90233cdf61620809285e38ccda
[INFO] checking bellrd/rust-server/752fbad1e72f7f90233cdf61620809285e38ccda against master#717f5df2c308dfb4b7b8e6c002c11fe8269c4011 for pr-133274
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbellrd%2Frust-server" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bellrd/rust-server on toolchain 717f5df2c308dfb4b7b8e6c002c11fe8269c4011
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+717f5df2c308dfb4b7b8e6c002c11fe8269c4011" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bellrd/rust-server
[INFO] finished tweaking git repo https://github.com/bellrd/rust-server
[INFO] tweaked toml for git repo https://github.com/bellrd/rust-server written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bellrd/rust-server 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" "+717f5df2c308dfb4b7b8e6c002c11fe8269c4011" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+717f5df2c308dfb4b7b8e6c002c11fe8269c4011" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1cc6be42e68979a843d7644e26f5a6379f8835dc766cdd9a04b6142a80039ce2
[INFO] running `Command { std: "docker" "start" "-a" "1cc6be42e68979a843d7644e26f5a6379f8835dc766cdd9a04b6142a80039ce2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cc6be42e68979a843d7644e26f5a6379f8835dc766cdd9a04b6142a80039ce2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cc6be42e68979a843d7644e26f5a6379f8835dc766cdd9a04b6142a80039ce2", kill_on_drop: false }`
[INFO] [stdout] 1cc6be42e68979a843d7644e26f5a6379f8835dc766cdd9a04b6142a80039ce2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+717f5df2c308dfb4b7b8e6c002c11fe8269c4011" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2bd5adc53a7ecdb9a68b93ef603d4b623ef955924481832d2629cb49ca0f804
[INFO] running `Command { std: "docker" "start" "-a" "d2bd5adc53a7ecdb9a68b93ef603d4b623ef955924481832d2629cb49ca0f804", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking god v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Err(e) => {}
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Err(e) => {}
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Err(e) => {println!("fail silently")}
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Err(e) => {println!("fail silently")}
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `position` is never read
[INFO] [stdout]    --> src/main.rs:213:33
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         let mut position = -1;
[INFO] [stdout]     |                                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `position` is never read
[INFO] [stdout]    --> src/main.rs:213:33
[INFO] [stdout]     |
[INFO] [stdout] 213 |                         let mut position = -1;
[INFO] [stdout]     |                                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     stream.set_nonblocking(true);
[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] 17 |     let _ = stream.set_nonblocking(true);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     stream.set_nonblocking(true);
[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] 17 |     let _ = stream.set_nonblocking(true);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     stream.set_nonblocking(false);
[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] 26 |     let _ = stream.set_nonblocking(false);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     stream.set_nonblocking(false);
[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] 26 |     let _ = stream.set_nonblocking(false);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:136:25
[INFO] [stdout]     |
[INFO] [stdout] 136 |                         connection.stream.write(&[0x00]);
[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] 136 |                         let _ = connection.stream.write(&[0x00]);
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:136:25
[INFO] [stdout]     |
[INFO] [stdout] 136 |                         connection.stream.write(&[0x00]);
[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] 136 |                         let _ = connection.stream.write(&[0x00]);
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "d2bd5adc53a7ecdb9a68b93ef603d4b623ef955924481832d2629cb49ca0f804", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2bd5adc53a7ecdb9a68b93ef603d4b623ef955924481832d2629cb49ca0f804", kill_on_drop: false }`
[INFO] [stdout] d2bd5adc53a7ecdb9a68b93ef603d4b623ef955924481832d2629cb49ca0f804