[INFO] fetching crate mio-child-process 0.2.1...
[INFO] checking mio-child-process-0.2.1 against master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073
[INFO] extracting crate mio-child-process 0.2.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate mio-child-process 0.2.1 on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mio-child-process 0.2.1
[INFO] finished tweaking crates.io crate mio-child-process 0.2.1
[INFO] tweaked toml for crates.io crate mio-child-process 0.2.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f1ec2444edb643bd2be3f2fe14bc317e7df19c5cec4f5b916d8435771261e38
[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" "0f1ec2444edb643bd2be3f2fe14bc317e7df19c5cec4f5b916d8435771261e38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f1ec2444edb643bd2be3f2fe14bc317e7df19c5cec4f5b916d8435771261e38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f1ec2444edb643bd2be3f2fe14bc317e7df19c5cec4f5b916d8435771261e38", kill_on_drop: false }`
[INFO] [stdout] 0f1ec2444edb643bd2be3f2fe14bc317e7df19c5cec4f5b916d8435771261e38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] de590d645242787a5822a58dc0fe1e0b854c57d27a0fa812a82129cdfe94d34c
[INFO] running `Command { std: "docker" "start" "-a" "de590d645242787a5822a58dc0fe1e0b854c57d27a0fa812a82129cdfe94d34c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking mio-child-process v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:234:13
[INFO] [stdout]     |
[INFO] [stdout] 77  | use std::io::{Error, ErrorKind, Read, Result, Write};
[INFO] [stdout]     |               ----- the item `Error` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 234 |         use std::io::Error;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:234:13
[INFO] [stdout]     |
[INFO] [stdout] 77  | use std::io::{Error, ErrorKind, Read, Result, Write};
[INFO] [stdout]     |               ----- the item `Error` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 234 |         use std::io::Error;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` 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 3.17s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "de590d645242787a5822a58dc0fe1e0b854c57d27a0fa812a82129cdfe94d34c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de590d645242787a5822a58dc0fe1e0b854c57d27a0fa812a82129cdfe94d34c", kill_on_drop: false }`
[INFO] [stdout] de590d645242787a5822a58dc0fe1e0b854c57d27a0fa812a82129cdfe94d34c