[INFO] fetching crate futures-util-io-peek 0.1.0...
[INFO] checking futures-util-io-peek-0.1.0 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate futures-util-io-peek 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate futures-util-io-peek 0.1.0 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-util-io-peek 0.1.0
[INFO] finished tweaking crates.io crate futures-util-io-peek 0.1.0
[INFO] tweaked toml for crates.io crate futures-util-io-peek 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nb-connect v1.1.0
[INFO] [stderr]   Downloaded async-task v3.0.0
[INFO] [stderr]   Downloaded smol v0.1.18
[INFO] [stderr]   Downloaded futures-lite v0.1.11
[INFO] [stderr]   Downloaded async-io v1.1.6
[INFO] [stderr]   Downloaded parking v1.0.6
[INFO] [stderr]   Downloaded polling v1.1.0
[INFO] [stderr]   Downloaded vec-arena v0.5.2
[INFO] [stderr]   Downloaded wepoll-sys-stjepang v1.0.8
[INFO] [stderr]   Downloaded polling v0.1.9
[INFO] [stderr]   Downloaded blocking v0.4.7
[INFO] [stderr]   Downloaded async-io v0.1.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c6e648f06d3b049eb9ebb743ba8197d178b8cfa4a04367f141048ab3c80c4e3
[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" "0c6e648f06d3b049eb9ebb743ba8197d178b8cfa4a04367f141048ab3c80c4e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c6e648f06d3b049eb9ebb743ba8197d178b8cfa4a04367f141048ab3c80c4e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c6e648f06d3b049eb9ebb743ba8197d178b8cfa4a04367f141048ab3c80c4e3", kill_on_drop: false }`
[INFO] [stdout] 0c6e648f06d3b049eb9ebb743ba8197d178b8cfa4a04367f141048ab3c80c4e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37f6d205ae70b3899c88adcc1ecc94b4f9e93a5628384d8fa8ddffa45185ba4d
[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" "37f6d205ae70b3899c88adcc1ecc94b4f9e93a5628384d8fa8ddffa45185ba4d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking futures-executor v0.3.14
[INFO] [stderr]     Checking futures-util-io-peek v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.52s
[INFO] running `Command { std: "docker" "inspect" "37f6d205ae70b3899c88adcc1ecc94b4f9e93a5628384d8fa8ddffa45185ba4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37f6d205ae70b3899c88adcc1ecc94b4f9e93a5628384d8fa8ddffa45185ba4d", kill_on_drop: false }`
[INFO] [stdout] 37f6d205ae70b3899c88adcc1ecc94b4f9e93a5628384d8fa8ddffa45185ba4d