[INFO] fetching crate bumpalo-herd 0.1.2...
[INFO] checking bumpalo-herd-0.1.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate bumpalo-herd 0.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate bumpalo-herd 0.1.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bumpalo-herd 0.1.2
[INFO] finished tweaking crates.io crate bumpalo-herd 0.1.2
[INFO] tweaked toml for crates.io crate bumpalo-herd 0.1.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 15 packages
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding crossbeam-utils v0.7.2 (latest: v0.8.19)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1bd5d8f725fc7e44847e1f71ae5ec123f5d9803667f2be0b9ee7591de144a1b
[INFO] running `Command { std: "docker" "start" "-a" "c1bd5d8f725fc7e44847e1f71ae5ec123f5d9803667f2be0b9ee7591de144a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1bd5d8f725fc7e44847e1f71ae5ec123f5d9803667f2be0b9ee7591de144a1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1bd5d8f725fc7e44847e1f71ae5ec123f5d9803667f2be0b9ee7591de144a1b", kill_on_drop: false }`
[INFO] [stdout] c1bd5d8f725fc7e44847e1f71ae5ec123f5d9803667f2be0b9ee7591de144a1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5fc5a408ea32543e60b8156e154c579c4727bbb8ee9e7fc385f8733eca3bbaa
[INFO] running `Command { std: "docker" "start" "-a" "e5fc5a408ea32543e60b8156e154c579c4727bbb8ee9e7fc385f8733eca3bbaa", kill_on_drop: false }`
[INFO] [stderr]     Checking bumpalo v3.15.4
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking bumpalo-herd v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Mutex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:270:9
[INFO] [stdout]     |
[INFO] [stdout] 270 |     use std::sync::Mutex;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 271 |
[INFO] [stdout] 272 |     use super::*;
[INFO] [stdout]     |         -------- the item `Mutex` is already imported here
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.37s
[INFO] running `Command { std: "docker" "inspect" "e5fc5a408ea32543e60b8156e154c579c4727bbb8ee9e7fc385f8733eca3bbaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5fc5a408ea32543e60b8156e154c579c4727bbb8ee9e7fc385f8733eca3bbaa", kill_on_drop: false }`
[INFO] [stdout] e5fc5a408ea32543e60b8156e154c579c4727bbb8ee9e7fc385f8733eca3bbaa
[INFO] checking bumpalo-herd-0.1.2 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate bumpalo-herd 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate bumpalo-herd 0.1.2 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bumpalo-herd 0.1.2
[INFO] finished tweaking crates.io crate bumpalo-herd 0.1.2
[INFO] tweaked toml for crates.io crate bumpalo-herd 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 15 packages
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding crossbeam-utils v0.7.2 (latest: v0.8.19)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa183dffb00ac8d67c46bb3d8d2c634eb56a5fc266e9b92edc48a16f0e090ce6
[INFO] running `Command { std: "docker" "start" "-a" "fa183dffb00ac8d67c46bb3d8d2c634eb56a5fc266e9b92edc48a16f0e090ce6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa183dffb00ac8d67c46bb3d8d2c634eb56a5fc266e9b92edc48a16f0e090ce6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa183dffb00ac8d67c46bb3d8d2c634eb56a5fc266e9b92edc48a16f0e090ce6", kill_on_drop: false }`
[INFO] [stdout] fa183dffb00ac8d67c46bb3d8d2c634eb56a5fc266e9b92edc48a16f0e090ce6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 730b5f29e5146e24993c205aedd0ad65fd73dc38d98dfbe01d8df4224e8587cc
[INFO] running `Command { std: "docker" "start" "-a" "730b5f29e5146e24993c205aedd0ad65fd73dc38d98dfbe01d8df4224e8587cc", kill_on_drop: false }`
[INFO] [stderr]     Checking bumpalo v3.15.4
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking bumpalo-herd v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Mutex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:270:9
[INFO] [stdout]     |
[INFO] [stdout] 270 |     use std::sync::Mutex;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 271 |
[INFO] [stdout] 272 |     use super::*;
[INFO] [stdout]     |         -------- the item `Mutex` is already imported here
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `Command { std: "docker" "inspect" "730b5f29e5146e24993c205aedd0ad65fd73dc38d98dfbe01d8df4224e8587cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "730b5f29e5146e24993c205aedd0ad65fd73dc38d98dfbe01d8df4224e8587cc", kill_on_drop: false }`
[INFO] [stdout] 730b5f29e5146e24993c205aedd0ad65fd73dc38d98dfbe01d8df4224e8587cc