[INFO] fetching crate clobber 0.3.0...
[INFO] checking clobber-0.3.0 against try#99a443d6903f71d521237d8acb5a3016b534d17b for pr-83354
[INFO] extracting crate clobber 0.3.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate clobber 0.3.0 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 clobber 0.3.0
[INFO] finished tweaking crates.io crate clobber 0.3.0
[INFO] tweaked toml for crates.io crate clobber 0.3.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate clobber 0.3.0 already has a lockfile, it will not be regenerated
[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 spin_sleep v0.3.7
[INFO] [stderr]   Downloaded fern v0.5.8
[INFO] [stderr]   Downloaded byte-mutator v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] d2598105e39772bab95a8790741abcad4104f64a153d18d5e8882c3815bd695e
[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" "d2598105e39772bab95a8790741abcad4104f64a153d18d5e8882c3815bd695e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2598105e39772bab95a8790741abcad4104f64a153d18d5e8882c3815bd695e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2598105e39772bab95a8790741abcad4104f64a153d18d5e8882c3815bd695e", kill_on_drop: false }`
[INFO] [stdout] d2598105e39772bab95a8790741abcad4104f64a153d18d5e8882c3815bd695e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stdout] 1c41f93ef81823536ebfc59e18e07701a2e81b8779a74a09735091edbc95038f
[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" "1c41f93ef81823536ebfc59e18e07701a2e81b8779a74a09735091edbc95038f", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.1
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling getrandom v0.1.11
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking spin_sleep v0.3.7
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking toml v0.5.5
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking async-task v1.0.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking fern v0.5.8
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking bstr v0.2.7
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking tinytemplate v1.0.2
[INFO] [stderr]     Checking chrono v0.4.7
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-timer v0.3.0
[INFO] [stderr]     Checking async-std v0.99.4
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]     Checking byte-mutator v0.1.1
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]     Checking clobber v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.41s
[INFO] running `Command { std: "docker" "inspect" "1c41f93ef81823536ebfc59e18e07701a2e81b8779a74a09735091edbc95038f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c41f93ef81823536ebfc59e18e07701a2e81b8779a74a09735091edbc95038f", kill_on_drop: false }`
[INFO] [stdout] 1c41f93ef81823536ebfc59e18e07701a2e81b8779a74a09735091edbc95038f