[INFO] fetching crate async_once 0.2.1...
[INFO] checking async_once-0.2.1 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate async_once 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate async_once 0.2.1 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async_once 0.2.1
[INFO] finished tweaking crates.io crate async_once 0.2.1
[INFO] tweaked toml for crates.io crate async_once 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b2b873f4e292d4bd4f78ad8b821cdafefac399346ea524aff1451bbfd670a46d
[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" "b2b873f4e292d4bd4f78ad8b821cdafefac399346ea524aff1451bbfd670a46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2b873f4e292d4bd4f78ad8b821cdafefac399346ea524aff1451bbfd670a46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2b873f4e292d4bd4f78ad8b821cdafefac399346ea524aff1451bbfd670a46d", kill_on_drop: false }`
[INFO] [stdout] b2b873f4e292d4bd4f78ad8b821cdafefac399346ea524aff1451bbfd670a46d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7323d76da885db94ac0fe6a4d25a3c1f52ced14d7566c063862d2d911f39be81
[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" "7323d76da885db94ac0fe6a4d25a3c1f52ced14d7566c063862d2d911f39be81", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking oorandom v11.1.2
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking async_once v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling tokio v0.3.3
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.18
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking futures-lite v1.11.2
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.68
[INFO] [stderr]     Checking csv v1.1.4
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking async-io v1.2.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking async-net v1.5.0
[INFO] [stderr]     Checking async-global-executor v1.4.3
[INFO] [stderr]     Checking async-process v1.0.1
[INFO] [stderr]     Checking async-std v1.7.0
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.68
[INFO] [stderr]     Checking smol v1.2.4
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.68
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Checking wasm-bindgen v0.2.68
[INFO] [stderr]     Checking js-sys v0.3.45
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking web-sys v0.3.45
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.18
[INFO] [stderr]     Checking wasm-bindgen-test v0.3.18
[INFO] [stderr]     Checking gloo-timers v0.2.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 58.74s
[INFO] running `Command { std: "docker" "inspect" "7323d76da885db94ac0fe6a4d25a3c1f52ced14d7566c063862d2d911f39be81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7323d76da885db94ac0fe6a4d25a3c1f52ced14d7566c063862d2d911f39be81", kill_on_drop: false }`
[INFO] [stdout] 7323d76da885db94ac0fe6a4d25a3c1f52ced14d7566c063862d2d911f39be81