[INFO] fetching crate kucoin_arbitrage 0.0.14...
[INFO] checking kucoin_arbitrage-0.0.14 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate kucoin_arbitrage 0.0.14 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate kucoin_arbitrage 0.0.14 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] removed /workspace/builds/worker-2-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate kucoin_arbitrage 0.0.14
[INFO] finished tweaking crates.io crate kucoin_arbitrage 0.0.14
[INFO] tweaked toml for crates.io crate kucoin_arbitrage 0.0.14 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate kucoin_arbitrage 0.0.14 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded streamunordered v0.5.3
[INFO] [stderr]   Downloaded kucoin_api v1.4.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1cefc1fe0b3f896647a3ce8c1f29bb5a60bfb90a07a4ded72ce8ab2eb96f6f09
[INFO] running `Command { std: "docker" "start" "-a" "1cefc1fe0b3f896647a3ce8c1f29bb5a60bfb90a07a4ded72ce8ab2eb96f6f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cefc1fe0b3f896647a3ce8c1f29bb5a60bfb90a07a4ded72ce8ab2eb96f6f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cefc1fe0b3f896647a3ce8c1f29bb5a60bfb90a07a4ded72ce8ab2eb96f6f09", kill_on_drop: false }`
[INFO] [stdout] 1cefc1fe0b3f896647a3ce8c1f29bb5a60bfb90a07a4ded72ce8ab2eb96f6f09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d78b4015561b6ab47f5d2deff05d86ecd9076abb87986e451a4949a6d1f0f319
[INFO] running `Command { std: "docker" "start" "-a" "d78b4015561b6ab47f5d2deff05d86ecd9076abb87986e451a4949a6d1f0f319", kill_on_drop: false }`
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[INFO] [stderr]     Checking kucoin_api v1.4.10
[INFO] [stderr]     Checking kucoin_arbitrage v0.0.14 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `toml` is imported redundantly
[INFO] [stdout]  --> src/error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use toml;
[INFO] [stdout]   |     ^^^^ the item `toml` 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 `toml` is imported redundantly
[INFO] [stdout]  --> src/error.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use toml;
[INFO] [stdout]   |     ^^^^ the item `toml` 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 13.99s
[INFO] running `Command { std: "docker" "inspect" "d78b4015561b6ab47f5d2deff05d86ecd9076abb87986e451a4949a6d1f0f319", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d78b4015561b6ab47f5d2deff05d86ecd9076abb87986e451a4949a6d1f0f319", kill_on_drop: false }`
[INFO] [stdout] d78b4015561b6ab47f5d2deff05d86ecd9076abb87986e451a4949a6d1f0f319