[INFO] fetching crate async-tcp 0.2.0...
[INFO] checking async-tcp-0.2.0 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate async-tcp 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate async-tcp 0.2.0 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-tcp 0.2.0
[INFO] finished tweaking crates.io crate async-tcp 0.2.0
[INFO] tweaked toml for crates.io crate async-tcp 0.2.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nb-connect v1.2.0
[INFO] [stderr]   Downloaded async-executor v0.2.1
[INFO] [stderr]   Downloaded smol v0.4.3
[INFO] [stderr]   Downloaded async-io v1.1.6
[INFO] [stderr]   Downloaded futures-micro v0.3.1
[INFO] [stderr]   Downloaded async-io v0.2.7
[INFO] [stderr]   Downloaded polling v1.1.0
[INFO] [stderr]   Downloaded async-process v0.1.3
[INFO] [stderr]   Downloaded async-peek v0.3.2
[INFO] [stderr]   Downloaded blocking v0.6.1
[INFO] [stderr]   Downloaded ufut v0.3.1
[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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 89e8f1795e9713532334fee9e359ab35f96c38fa8ac259c1544076786cad3b02
[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" "89e8f1795e9713532334fee9e359ab35f96c38fa8ac259c1544076786cad3b02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "89e8f1795e9713532334fee9e359ab35f96c38fa8ac259c1544076786cad3b02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89e8f1795e9713532334fee9e359ab35f96c38fa8ac259c1544076786cad3b02", kill_on_drop: false }`
[INFO] [stdout] 89e8f1795e9713532334fee9e359ab35f96c38fa8ac259c1544076786cad3b02
[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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af27f44f1350fbf6115d322b57a3a2cf60088d5295f536c92433cf04a7d8c7dd
[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" "af27f44f1350fbf6115d322b57a3a2cf60088d5295f536c92433cf04a7d8c7dd", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking fastrand v1.4.1
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking futures-io v0.3.14
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking futures-micro v0.3.1
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking polling v0.1.9
[INFO] [stderr]     Checking polling v1.1.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking ufut v0.3.1
[INFO] [stderr]     Checking async-lock v2.4.0
[INFO] [stderr]     Checking async-peek v0.3.2
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking signal-hook v0.1.17
[INFO] [stderr]     Checking nb-connect v1.2.0
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-io v0.2.7
[INFO] [stderr]     Checking async-io v1.1.6
[INFO] [stderr]     Checking blocking v0.6.1
[INFO] [stderr]     Checking async-executor v0.2.1
[INFO] [stderr]     Checking async-tcp v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking async-net v1.6.0
[INFO] [stderr]     Checking async-process v0.1.3
[INFO] [stderr]     Checking smol v0.4.3
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.83s
[INFO] running `Command { std: "docker" "inspect" "af27f44f1350fbf6115d322b57a3a2cf60088d5295f536c92433cf04a7d8c7dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af27f44f1350fbf6115d322b57a3a2cf60088d5295f536c92433cf04a7d8c7dd", kill_on_drop: false }`
[INFO] [stdout] af27f44f1350fbf6115d322b57a3a2cf60088d5295f536c92433cf04a7d8c7dd