[INFO] fetching crate bitfield 0.15.0...
[INFO] checking bitfield-0.15.0 against master#368e2fd458a22d0cc133d0c254f2612ee999744f for pr-128351
[INFO] extracting crate bitfield 0.15.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate bitfield 0.15.0 on toolchain 368e2fd458a22d0cc133d0c254f2612ee999744f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+368e2fd458a22d0cc133d0c254f2612ee999744f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bitfield 0.15.0
[INFO] finished tweaking crates.io crate bitfield 0.15.0
[INFO] tweaked toml for crates.io crate bitfield 0.15.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate bitfield 0.15.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+368e2fd458a22d0cc133d0c254f2612ee999744f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+368e2fd458a22d0cc133d0c254f2612ee999744f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3710c81404a128ed99aaf0119b6370c9f6b7b8311b14accf8e7e623f5fdc54d4
[INFO] running `Command { std: "docker" "start" "-a" "3710c81404a128ed99aaf0119b6370c9f6b7b8311b14accf8e7e623f5fdc54d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3710c81404a128ed99aaf0119b6370c9f6b7b8311b14accf8e7e623f5fdc54d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3710c81404a128ed99aaf0119b6370c9f6b7b8311b14accf8e7e623f5fdc54d4", kill_on_drop: false }`
[INFO] [stdout] 3710c81404a128ed99aaf0119b6370c9f6b7b8311b14accf8e7e623f5fdc54d4
[ERROR] this task or one of its parent failed!
[ERROR] command failed: exit status: 1
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking bitfield-0.15.0 against try#09146510cdb33d15474a35fde290187a88b1cf35 for pr-128351
[INFO] extracting crate bitfield 0.15.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate bitfield 0.15.0 on toolchain 09146510cdb33d15474a35fde290187a88b1cf35
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09146510cdb33d15474a35fde290187a88b1cf35" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bitfield 0.15.0
[INFO] finished tweaking crates.io crate bitfield 0.15.0
[INFO] tweaked toml for crates.io crate bitfield 0.15.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate bitfield 0.15.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09146510cdb33d15474a35fde290187a88b1cf35" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+09146510cdb33d15474a35fde290187a88b1cf35" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63940e500709aab2f90982422b1ce910fc58131328ecd662b6ceee9b48443fbb
[INFO] running `Command { std: "docker" "start" "-a" "63940e500709aab2f90982422b1ce910fc58131328ecd662b6ceee9b48443fbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63940e500709aab2f90982422b1ce910fc58131328ecd662b6ceee9b48443fbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63940e500709aab2f90982422b1ce910fc58131328ecd662b6ceee9b48443fbb", kill_on_drop: false }`
[INFO] [stdout] 63940e500709aab2f90982422b1ce910fc58131328ecd662b6ceee9b48443fbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+09146510cdb33d15474a35fde290187a88b1cf35" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa170005b8764f6c0d4cc70edbfa31bb4c4fda3eb90c6d94c63c56f5d2f36f4d
[INFO] running `Command { std: "docker" "start" "-a" "fa170005b8764f6c0d4cc70edbfa31bb4c4fda3eb90c6d94c63c56f5d2f36f4d", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking bitfield v0.15.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]     --> tests/lib.rs:1135:9
[INFO] [stdout]      |
[INFO] [stdout] 1135 |         format!("{:?}", BitField1(0));
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]      = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]     --> tests/lib.rs:1136:9
[INFO] [stdout]      |
[INFO] [stdout] 1136 |         format!("{:?}", BitField3(0));
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]     --> tests/lib.rs:1137:9
[INFO] [stdout]      |
[INFO] [stdout] 1137 |         format!("{:?}", BitField4([0; 1]));
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]     --> tests/lib.rs:1138:9
[INFO] [stdout]      |
[INFO] [stdout] 1138 |         format!("{:?}", BitField6([0; 1]));
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]     --> tests/lib.rs:1139:9
[INFO] [stdout]      |
[INFO] [stdout] 1139 |         format!("{:?}", BitField7([0; 1]));
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]     --> tests/lib.rs:1140:9
[INFO] [stdout]      |
[INFO] [stdout] 1140 |         format!("{:?}", BitField9([0; 1]));
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `Command { std: "docker" "inspect" "fa170005b8764f6c0d4cc70edbfa31bb4c4fda3eb90c6d94c63c56f5d2f36f4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa170005b8764f6c0d4cc70edbfa31bb4c4fda3eb90c6d94c63c56f5d2f36f4d", kill_on_drop: false }`
[INFO] [stdout] fa170005b8764f6c0d4cc70edbfa31bb4c4fda3eb90c6d94c63c56f5d2f36f4d