[INFO] fetching crate seqio 0.1.1...
[INFO] checking seqio-0.1.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate seqio 0.1.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate seqio 0.1.1 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 seqio 0.1.1
[INFO] finished tweaking crates.io crate seqio 0.1.1
[INFO] tweaked toml for crates.io crate seqio 0.1.1 written to /workspace/builds/worker-6-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]      Locking 6 packages
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 17615765f1137f09cfe6722796d8f4a54d5b1dc2af5778d7d790dcd753057f94
[INFO] running `Command { std: "docker" "start" "-a" "17615765f1137f09cfe6722796d8f4a54d5b1dc2af5778d7d790dcd753057f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17615765f1137f09cfe6722796d8f4a54d5b1dc2af5778d7d790dcd753057f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17615765f1137f09cfe6722796d8f4a54d5b1dc2af5778d7d790dcd753057f94", kill_on_drop: false }`
[INFO] [stdout] 17615765f1137f09cfe6722796d8f4a54d5b1dc2af5778d7d790dcd753057f94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2ba5f0d918ae57f468715598728cb3ad3f8dc55e6863dda5e0274e859206520b
[INFO] running `Command { std: "docker" "start" "-a" "2ba5f0d918ae57f468715598728cb3ad3f8dc55e6863dda5e0274e859206520b", kill_on_drop: false }`
[INFO] [stderr]     Checking seqio v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]   --> src/utils.rs:62:28
[INFO] [stdout]    |
[INFO] [stdout] 62 |     io::{self, prelude::*, BufRead, BufReader, BufWriter, Result, Write},
[INFO] [stdout]    |                ----------  ^^^^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the item `BufRead` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/utils.rs:62:67
[INFO] [stdout]    |
[INFO] [stdout] 62 |     io::{self, prelude::*, BufRead, BufReader, BufWriter, Result, Write},
[INFO] [stdout]    |                ----------                                         ^^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the item `Write` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]   --> src/utils.rs:62:28
[INFO] [stdout]    |
[INFO] [stdout] 62 |     io::{self, prelude::*, BufRead, BufReader, BufWriter, Result, Write},
[INFO] [stdout]    |                ----------  ^^^^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the item `BufRead` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/utils.rs:62:67
[INFO] [stdout]    |
[INFO] [stdout] 62 |     io::{self, prelude::*, BufRead, BufReader, BufWriter, Result, Write},
[INFO] [stdout]    |                ----------                                         ^^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the item `Write` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "2ba5f0d918ae57f468715598728cb3ad3f8dc55e6863dda5e0274e859206520b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ba5f0d918ae57f468715598728cb3ad3f8dc55e6863dda5e0274e859206520b", kill_on_drop: false }`
[INFO] [stdout] 2ba5f0d918ae57f468715598728cb3ad3f8dc55e6863dda5e0274e859206520b