[INFO] fetching crate simple-socket 0.1.6...
[INFO] checking simple-socket-0.1.6 against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] extracting crate simple-socket 0.1.6 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate simple-socket 0.1.6 on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple-socket 0.1.6
[INFO] finished tweaking crates.io crate simple-socket 0.1.6
[INFO] tweaked toml for crates.io crate simple-socket 0.1.6 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate simple-socket 0.1.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1d6bec3d95ba65b88f2e79b10fdf105cd73ab3485c69748337d9e2ad5cc6b4b
[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" "c1d6bec3d95ba65b88f2e79b10fdf105cd73ab3485c69748337d9e2ad5cc6b4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1d6bec3d95ba65b88f2e79b10fdf105cd73ab3485c69748337d9e2ad5cc6b4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1d6bec3d95ba65b88f2e79b10fdf105cd73ab3485c69748337d9e2ad5cc6b4b", kill_on_drop: false }`
[INFO] [stdout] c1d6bec3d95ba65b88f2e79b10fdf105cd73ab3485c69748337d9e2ad5cc6b4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f0873e9f7e3bb6d8332264994403bf5a9abba9ed68b7f62f5d805b7d59496d9e
[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" "f0873e9f7e3bb6d8332264994403bf5a9abba9ed68b7f62f5d805b7d59496d9e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking podo-core-driver v0.4.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]     Checking serde v1.0.111
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]     Checking simple-socket v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/simple.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut client = SocketClient::<Request, Response>::try_new(socket).unwrap();
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.76s
[INFO] running `Command { std: "docker" "inspect" "f0873e9f7e3bb6d8332264994403bf5a9abba9ed68b7f62f5d805b7d59496d9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0873e9f7e3bb6d8332264994403bf5a9abba9ed68b7f62f5d805b7d59496d9e", kill_on_drop: false }`
[INFO] [stdout] f0873e9f7e3bb6d8332264994403bf5a9abba9ed68b7f62f5d805b7d59496d9e