[INFO] fetching crate spawn_groups 1.0.0...
[INFO] checking spawn_groups-1.0.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate spawn_groups 1.0.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate spawn_groups 1.0.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate spawn_groups 1.0.0
[INFO] finished tweaking crates.io crate spawn_groups 1.0.0
[INFO] tweaked toml for crates.io crate spawn_groups 1.0.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 39 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding event-listener v2.5.3 (latest: v5.2.0)
[INFO] [stderr]       Adding fastrand v1.9.0 (latest: v2.0.2)
[INFO] [stderr]       Adding futures-lite v1.13.0 (latest: v2.3.0)
[INFO] [stderr]       Adding redox_syscall v0.4.1 (latest: v0.5.1)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cooked-waker v5.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fcee8b309e959d215a0076043e32e9849c0298679f76c800c6819895c312ea90
[INFO] running `Command { std: "docker" "start" "-a" "fcee8b309e959d215a0076043e32e9849c0298679f76c800c6819895c312ea90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcee8b309e959d215a0076043e32e9849c0298679f76c800c6819895c312ea90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcee8b309e959d215a0076043e32e9849c0298679f76c800c6819895c312ea90", kill_on_drop: false }`
[INFO] [stdout] fcee8b309e959d215a0076043e32e9849c0298679f76c800c6819895c312ea90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3ae5f6ddff49dfbb51c32872cf226fa3dcee4e4a828a95852b5c9a8e479a19b
[INFO] running `Command { std: "docker" "start" "-a" "f3ae5f6ddff49dfbb51c32872cf226fa3dcee4e4a828a95852b5c9a8e479a19b", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking waker-fn v1.1.1
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking parking v2.2.0
[INFO] [stderr]     Checking cooked-waker v5.0.0
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking spawn_groups v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `num_cpus` is imported redundantly
[INFO] [stdout]  --> src/shared/runtime.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use num_cpus;
[INFO] [stdout]   |     ^^^^^^^^ the item `num_cpus` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `num_cpus` is imported redundantly
[INFO] [stdout]  --> src/shared/runtime.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use num_cpus;
[INFO] [stdout]   |     ^^^^^^^^ the item `num_cpus` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "f3ae5f6ddff49dfbb51c32872cf226fa3dcee4e4a828a95852b5c9a8e479a19b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3ae5f6ddff49dfbb51c32872cf226fa3dcee4e4a828a95852b5c9a8e479a19b", kill_on_drop: false }`
[INFO] [stdout] f3ae5f6ddff49dfbb51c32872cf226fa3dcee4e4a828a95852b5c9a8e479a19b