[INFO] fetching crate liberty-io 0.0.2...
[INFO] checking liberty-io-0.0.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate liberty-io 0.0.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate liberty-io 0.0.2 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 liberty-io 0.0.2
[INFO] finished tweaking crates.io crate liberty-io 0.0.2
[INFO] tweaked toml for crates.io crate liberty-io 0.0.2 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 21 packages
[INFO] [stderr]       Adding byteorder v1.3.4 (latest: v1.5.0)
[INFO] [stderr]       Adding iron-shapes v0.0.7 (latest: v0.0.8)
[INFO] [stderr]       Adding iron-shapes-booleanop v0.0.2 (latest: v0.0.3)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding libreda-db v0.0.8 (latest: v0.0.10)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded iron-shapes-booleanop v0.0.2
[INFO] [stderr]   Downloaded libreda-db v0.0.8
[INFO] [stderr]   Downloaded libreda-splay v0.1.0
[INFO] [stderr]   Downloaded iron-shapes v0.0.7
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bedd7ab41b14dfdf599cf2b0ae8665a20a594aa561824240874151839e8c237b
[INFO] running `Command { std: "docker" "start" "-a" "bedd7ab41b14dfdf599cf2b0ae8665a20a594aa561824240874151839e8c237b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bedd7ab41b14dfdf599cf2b0ae8665a20a594aa561824240874151839e8c237b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bedd7ab41b14dfdf599cf2b0ae8665a20a594aa561824240874151839e8c237b", kill_on_drop: false }`
[INFO] [stdout] bedd7ab41b14dfdf599cf2b0ae8665a20a594aa561824240874151839e8c237b
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a843018c087fd65597e6353778d8138486657b24703f96ab5f9df2449ddd175f
[INFO] running `Command { std: "docker" "start" "-a" "a843018c087fd65597e6353778d8138486657b24703f96ab5f9df2449ddd175f", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking libreda-splay v0.1.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking num-bigint v0.4.4
[INFO] [stderr]     Checking iron-shapes v0.0.7
[INFO] [stderr]     Checking iron-shapes-booleanop v0.0.2
[INFO] [stderr]     Checking libreda-db v0.0.8
[INFO] [stderr]     Checking liberty-io v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `liberty_io` is imported redundantly
[INFO] [stdout]   --> tests/tests.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use liberty_io;
[INFO] [stdout]    |     ^^^^^^^^^^ the item `liberty_io` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.41s
[INFO] running `Command { std: "docker" "inspect" "a843018c087fd65597e6353778d8138486657b24703f96ab5f9df2449ddd175f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a843018c087fd65597e6353778d8138486657b24703f96ab5f9df2449ddd175f", kill_on_drop: false }`
[INFO] [stdout] a843018c087fd65597e6353778d8138486657b24703f96ab5f9df2449ddd175f