[INFO] fetching crate switchyard 0.1.1...
[INFO] checking switchyard-0.1.1 against master#2ad5292aea6328113b55968b4322528d48261316 for pr-80243
[INFO] extracting crate switchyard 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate switchyard 0.1.1 on toolchain 2ad5292aea6328113b55968b4322528d48261316
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate switchyard 0.1.1
[INFO] finished tweaking crates.io crate switchyard 0.1.1
[INFO] tweaked toml for crates.io crate switchyard 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "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-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3486f28f1a40e11b1d06a77ba14b91a3f5ca71fe399872d74aed746118d0bb6
[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" "d3486f28f1a40e11b1d06a77ba14b91a3f5ca71fe399872d74aed746118d0bb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3486f28f1a40e11b1d06a77ba14b91a3f5ca71fe399872d74aed746118d0bb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3486f28f1a40e11b1d06a77ba14b91a3f5ca71fe399872d74aed746118d0bb6", kill_on_drop: false }`
[INFO] [stdout] d3486f28f1a40e11b1d06a77ba14b91a3f5ca71fe399872d74aed746118d0bb6
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0db89675d1eb7846afd96781b1152002a006f82d261ae46bd1d681c08d5d161
[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" "b0db89675d1eb7846afd96781b1152002a006f82d261ae46bd1d681c08d5d161", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking slotmap v0.4.0
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]    Compiling priority-queue v1.0.5
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking futures-task v0.3.8
[INFO] [stderr]     Checking spinning_top v0.2.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking crossbeam-utils v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking errno v0.2.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking serde_json v1.0.60
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking affinity v0.1.1
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking futures-intrusive v0.4.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking nanorand v0.4.4
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking flume v0.9.2
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking switchyard v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]     Checking async-global-executor v1.4.3
[INFO] [stderr]     Checking async-std v1.8.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.47s
[INFO] running `Command { std: "docker" "inspect" "b0db89675d1eb7846afd96781b1152002a006f82d261ae46bd1d681c08d5d161", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0db89675d1eb7846afd96781b1152002a006f82d261ae46bd1d681c08d5d161", kill_on_drop: false }`
[INFO] [stdout] b0db89675d1eb7846afd96781b1152002a006f82d261ae46bd1d681c08d5d161