[INFO] fetching crate waitgroup 0.1.1...
[INFO] checking waitgroup-0.1.1 against master#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] extracting crate waitgroup 0.1.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate waitgroup 0.1.1 on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate waitgroup 0.1.1
[INFO] finished tweaking crates.io crate waitgroup 0.1.1
[INFO] tweaked toml for crates.io crate waitgroup 0.1.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 30a6d23e7ea8fa0ccf3d6932f303d095cb1f2fd88c8b450adcaf1d1c485848e3
[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" "30a6d23e7ea8fa0ccf3d6932f303d095cb1f2fd88c8b450adcaf1d1c485848e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30a6d23e7ea8fa0ccf3d6932f303d095cb1f2fd88c8b450adcaf1d1c485848e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30a6d23e7ea8fa0ccf3d6932f303d095cb1f2fd88c8b450adcaf1d1c485848e3", kill_on_drop: false }`
[INFO] [stdout] 30a6d23e7ea8fa0ccf3d6932f303d095cb1f2fd88c8b450adcaf1d1c485848e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54137d7dfb298f4d6a6fb160fb64d85d2955bb241502c4c1589278b34beec8c5
[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" "54137d7dfb298f4d6a6fb160fb64d85d2955bb241502c4c1589278b34beec8c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking pin-project-lite v0.1.10
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking async-task v4.0.2
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking waitgroup v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking nb-connect v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking async-channel v1.4.2
[INFO] [stderr]     Checking polling v2.0.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking futures-lite v1.8.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking async-executor v1.3.0
[INFO] [stderr]     Checking async-io v1.1.8
[INFO] [stderr]     Checking blocking v1.0.0
[INFO] [stderr]     Checking async-global-executor v1.3.0
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]     Checking async-std v1.6.5
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.41s
[INFO] running `Command { std: "docker" "inspect" "54137d7dfb298f4d6a6fb160fb64d85d2955bb241502c4c1589278b34beec8c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54137d7dfb298f4d6a6fb160fb64d85d2955bb241502c4c1589278b34beec8c5", kill_on_drop: false }`
[INFO] [stdout] 54137d7dfb298f4d6a6fb160fb64d85d2955bb241502c4c1589278b34beec8c5