[INFO] fetching crate smolscale 0.3.16...
[INFO] checking smolscale-0.3.16 against stable for pr-85048-2
[INFO] extracting crate smolscale 0.3.16 into /workspace/builds/worker-76/source
[INFO] validating manifest of crates.io crate smolscale 0.3.16 on toolchain stable
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+stable" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate smolscale 0.3.16
[INFO] finished tweaking crates.io crate smolscale 0.3.16
[INFO] tweaked toml for crates.io crate smolscale 0.3.16 written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] crate crates.io crate smolscale 0.3.16 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+stable" "fetch" "--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-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+stable" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a879bfb95607ff9ca1ee4682b50d84586d722c69050ed3a67ab0838165413f21
[INFO] running `Command { std: "docker" "start" "-a" "a879bfb95607ff9ca1ee4682b50d84586d722c69050ed3a67ab0838165413f21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a879bfb95607ff9ca1ee4682b50d84586d722c69050ed3a67ab0838165413f21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a879bfb95607ff9ca1ee4682b50d84586d722c69050ed3a67ab0838165413f21", kill_on_drop: false }`
[INFO] [stdout] a879bfb95607ff9ca1ee4682b50d84586d722c69050ed3a67ab0838165413f21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+stable" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4219aa2853c9e9a9275a76432324fcd3094bdad066b665abd3609e82d085024
[INFO] running `Command { std: "docker" "start" "-a" "e4219aa2853c9e9a9275a76432324fcd3094bdad066b665abd3609e82d085024", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
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[INFO] [stderr]     Checking once_cell v1.8.0
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[INFO] [stderr]     Checking futures-io v0.3.15
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[INFO] [stderr]     Checking parking v2.0.0
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[INFO] [stderr]    Compiling rayon-core v1.9.1
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[INFO] [stderr]    Compiling bitflags v1.2.1
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[INFO] [stderr]    Compiling anyhow v1.0.41
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[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]     Checking async-oneshot v0.4.2
[INFO] [stderr]     Checking itertools v0.9.0
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[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]     Checking csv-core v0.1.10
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[INFO] [stderr]     Checking serde_cbor v0.11.1
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[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking futures-intrusive v0.4.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]    Compiling cast v0.2.6
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking smolscale v0.3.16 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Mutex`
[INFO] [stdout]  --> src/executor.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 |     sync::{Arc, Mutex, RwLock},
[INFO] [stdout]   |                 ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `concurrent_queue::ConcurrentQueue`
[INFO] [stdout]  --> src/executor.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use concurrent_queue::ConcurrentQueue;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stdout] warning: unused import: `Mutex`
[INFO] [stdout]  --> src/executor.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 |     sync::{Arc, Mutex, RwLock},
[INFO] [stdout]   |                 ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `concurrent_queue::ConcurrentQueue`
[INFO] [stdout]  --> src/executor.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use concurrent_queue::ConcurrentQueue;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 52s
[INFO] running `Command { std: "docker" "inspect" "e4219aa2853c9e9a9275a76432324fcd3094bdad066b665abd3609e82d085024", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4219aa2853c9e9a9275a76432324fcd3094bdad066b665abd3609e82d085024", kill_on_drop: false }`
[INFO] [stdout] e4219aa2853c9e9a9275a76432324fcd3094bdad066b665abd3609e82d085024