[INFO] fetching crate async_once 0.2.1...
[INFO] checking async_once-0.2.1 against try#99a443d6903f71d521237d8acb5a3016b534d17b for pr-83354
[INFO] extracting crate async_once 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate async_once 0.2.1 on toolchain 99a443d6903f71d521237d8acb5a3016b534d17b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smol v1.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a166df7d02ec3e13b1cd9295e2b8b80d26d8477f8d6c87abf9f80269e39c0810
[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" "a166df7d02ec3e13b1cd9295e2b8b80d26d8477f8d6c87abf9f80269e39c0810", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a166df7d02ec3e13b1cd9295e2b8b80d26d8477f8d6c87abf9f80269e39c0810", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a166df7d02ec3e13b1cd9295e2b8b80d26d8477f8d6c87abf9f80269e39c0810", kill_on_drop: false }`
[INFO] [stdout] a166df7d02ec3e13b1cd9295e2b8b80d26d8477f8d6c87abf9f80269e39c0810
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1b676584d58fb37bdc21d181875b7c606f1c40d44164cc4110fcdf9d81981f41
[INFO] running `Command { std: "docker" "start" "-a" "1b676584d58fb37bdc21d181875b7c606f1c40d44164cc4110fcdf9d81981f41", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking futures-core v0.3.13
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking futures-io v0.3.13
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking vec-arena v1.1.0
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling signal-hook v0.3.7
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking async_once v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling tokio v0.3.7
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking futures-channel v0.3.13
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking socket2 v0.4.0
[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 async-channel v1.6.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking nb-connect v1.1.0
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.22
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]     Checking polling v2.0.3
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.72
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-process v1.0.2
[INFO] [stderr]     Checking async-net v1.5.0
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.72
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.72
[INFO] [stderr]     Checking wasm-bindgen v0.2.72
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stderr]     Checking js-sys v0.3.49
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking web-sys v0.3.49
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.22
[INFO] [stderr]     Checking wasm-bindgen-test v0.3.22
[INFO] [stderr]     Checking gloo-timers v0.2.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 37s
[INFO] running `Command { std: "docker" "inspect" "1b676584d58fb37bdc21d181875b7c606f1c40d44164cc4110fcdf9d81981f41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b676584d58fb37bdc21d181875b7c606f1c40d44164cc4110fcdf9d81981f41", kill_on_drop: false }`
[INFO] [stdout] 1b676584d58fb37bdc21d181875b7c606f1c40d44164cc4110fcdf9d81981f41