[INFO] fetching crate mini-lsm 0.1.0...
[INFO] checking mini-lsm-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate mini-lsm 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate mini-lsm 0.1.0 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 mini-lsm 0.1.0
[INFO] finished tweaking crates.io crate mini-lsm 0.1.0
[INFO] tweaked toml for crates.io crate mini-lsm 0.1.0 written to /workspace/builds/worker-4-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 2 packages
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e838a164a8023456e0c0862d6dfa18646ce82ec5479caf5d12383b22c858ea6f
[INFO] running `Command { std: "docker" "start" "-a" "e838a164a8023456e0c0862d6dfa18646ce82ec5479caf5d12383b22c858ea6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e838a164a8023456e0c0862d6dfa18646ce82ec5479caf5d12383b22c858ea6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e838a164a8023456e0c0862d6dfa18646ce82ec5479caf5d12383b22c858ea6f", kill_on_drop: false }`
[INFO] [stdout] e838a164a8023456e0c0862d6dfa18646ce82ec5479caf5d12383b22c858ea6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 28de7c8a36e949ab89f495a61cf909254ee698d37d089bbff6299ed84001df62
[INFO] running `Command { std: "docker" "start" "-a" "28de7c8a36e949ab89f495a61cf909254ee698d37d089bbff6299ed84001df62", kill_on_drop: false }`
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking mini-lsm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BlockBuilder` is imported redundantly
[INFO] [stdout]   --> src/block.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |     use super::{builder::BlockBuilder, iterator::BlockIterator, *};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^                           - the item `BlockBuilder` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BlockIterator` is imported redundantly
[INFO] [stdout]   --> src/block.rs:45:40
[INFO] [stdout]    |
[INFO] [stdout] 45 |     use super::{builder::BlockBuilder, iterator::BlockIterator, *};
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^  - the item `BlockIterator` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "28de7c8a36e949ab89f495a61cf909254ee698d37d089bbff6299ed84001df62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28de7c8a36e949ab89f495a61cf909254ee698d37d089bbff6299ed84001df62", kill_on_drop: false }`
[INFO] [stdout] 28de7c8a36e949ab89f495a61cf909254ee698d37d089bbff6299ed84001df62
[INFO] checking mini-lsm-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate mini-lsm 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate mini-lsm 0.1.0 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 mini-lsm 0.1.0
[INFO] finished tweaking crates.io crate mini-lsm 0.1.0
[INFO] tweaked toml for crates.io crate mini-lsm 0.1.0 written to /workspace/builds/worker-4-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 2 packages
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 4a16a871cf54e3cbb1b0d38b1540425402fe757c7264e171ce521d1f95a09d88
[INFO] running `Command { std: "docker" "start" "-a" "4a16a871cf54e3cbb1b0d38b1540425402fe757c7264e171ce521d1f95a09d88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a16a871cf54e3cbb1b0d38b1540425402fe757c7264e171ce521d1f95a09d88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a16a871cf54e3cbb1b0d38b1540425402fe757c7264e171ce521d1f95a09d88", kill_on_drop: false }`
[INFO] [stdout] 4a16a871cf54e3cbb1b0d38b1540425402fe757c7264e171ce521d1f95a09d88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] eecfc3e6f2227747cfde7c7d05097fce0cdd550d580af8bec3b7f1176f968f63
[INFO] running `Command { std: "docker" "start" "-a" "eecfc3e6f2227747cfde7c7d05097fce0cdd550d580af8bec3b7f1176f968f63", kill_on_drop: false }`
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking mini-lsm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BlockBuilder` is imported redundantly
[INFO] [stdout]   --> src/block.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 |     use super::{builder::BlockBuilder, iterator::BlockIterator, *};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^                           - the item `BlockBuilder` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BlockIterator` is imported redundantly
[INFO] [stdout]   --> src/block.rs:45:40
[INFO] [stdout]    |
[INFO] [stdout] 45 |     use super::{builder::BlockBuilder, iterator::BlockIterator, *};
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^  - the item `BlockIterator` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "eecfc3e6f2227747cfde7c7d05097fce0cdd550d580af8bec3b7f1176f968f63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eecfc3e6f2227747cfde7c7d05097fce0cdd550d580af8bec3b7f1176f968f63", kill_on_drop: false }`
[INFO] [stdout] eecfc3e6f2227747cfde7c7d05097fce0cdd550d580af8bec3b7f1176f968f63