[INFO] cloning repository https://github.com/TheSylex/rust-tcp-client
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TheSylex/rust-tcp-client" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheSylex%2Frust-tcp-client", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheSylex%2Frust-tcp-client'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ebd3d2fb9990ee04cc503ad816a0629891999f6
[INFO] testing TheSylex/rust-tcp-client against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheSylex%2Frust-tcp-client" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TheSylex/rust-tcp-client on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TheSylex/rust-tcp-client
[INFO] finished tweaking git repo https://github.com/TheSylex/rust-tcp-client
[INFO] tweaked toml for git repo https://github.com/TheSylex/rust-tcp-client written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/TheSylex/rust-tcp-client already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e5fbc0973bfd50809bd3f6b238e09c11127ce6ebb97400cd7f2b010c2b337c6c
[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" "e5fbc0973bfd50809bd3f6b238e09c11127ce6ebb97400cd7f2b010c2b337c6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5fbc0973bfd50809bd3f6b238e09c11127ce6ebb97400cd7f2b010c2b337c6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5fbc0973bfd50809bd3f6b238e09c11127ce6ebb97400cd7f2b010c2b337c6c", kill_on_drop: false }`
[INFO] [stdout] e5fbc0973bfd50809bd3f6b238e09c11127ce6ebb97400cd7f2b010c2b337c6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1113fa91bf20732017bb500aa4001a6fa5c46cb69444f281f69cc8bca0fac9b7
[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" "1113fa91bf20732017bb500aa4001a6fa5c46cb69444f281f69cc8bca0fac9b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tcp-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |             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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.39s
[INFO] running `Command { std: "docker" "inspect" "1113fa91bf20732017bb500aa4001a6fa5c46cb69444f281f69cc8bca0fac9b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1113fa91bf20732017bb500aa4001a6fa5c46cb69444f281f69cc8bca0fac9b7", kill_on_drop: false }`
[INFO] [stdout] 1113fa91bf20732017bb500aa4001a6fa5c46cb69444f281f69cc8bca0fac9b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b887a01612c7589415e33c1116b5fa648b1c62cb7d0a8d20c70a799bdb8be789
[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" "b887a01612c7589415e33c1116b5fa648b1c62cb7d0a8d20c70a799bdb8be789", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling tcp-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |             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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.48s
[INFO] running `Command { std: "docker" "inspect" "b887a01612c7589415e33c1116b5fa648b1c62cb7d0a8d20c70a799bdb8be789", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b887a01612c7589415e33c1116b5fa648b1c62cb7d0a8d20c70a799bdb8be789", kill_on_drop: false }`
[INFO] [stdout] b887a01612c7589415e33c1116b5fa648b1c62cb7d0a8d20c70a799bdb8be789
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] acb1162beb4aad7f125032535c96db50ca39e1848b6961a65b356dba302b78df
[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" "acb1162beb4aad7f125032535c96db50ca39e1848b6961a65b356dba302b78df", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:88:17
[INFO] [stderr]    |
[INFO] [stderr] 88 |             Err(e) => {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tcp-client` (bin "tcp-client" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tcp_client-39440f3bcd175d1f)
[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" "acb1162beb4aad7f125032535c96db50ca39e1848b6961a65b356dba302b78df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acb1162beb4aad7f125032535c96db50ca39e1848b6961a65b356dba302b78df", kill_on_drop: false }`
[INFO] [stdout] acb1162beb4aad7f125032535c96db50ca39e1848b6961a65b356dba302b78df