[INFO] fetching crate tensile 0.7.0...
[INFO] checking tensile-0.7.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate tensile 0.7.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate tensile 0.7.0 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 tensile 0.7.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate tensile 0.7.0
[INFO] tweaked toml for crates.io crate tensile 0.7.0 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 56 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding heck v0.3.3 (latest: v0.5.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding strsim v0.8.0 (latest: v0.11.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[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] 4481bf7160d1e7577c54b849b6bebb9648f8678890b9e1d0add97e2191bc7767
[INFO] running `Command { std: "docker" "start" "-a" "4481bf7160d1e7577c54b849b6bebb9648f8678890b9e1d0add97e2191bc7767", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4481bf7160d1e7577c54b849b6bebb9648f8678890b9e1d0add97e2191bc7767", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4481bf7160d1e7577c54b849b6bebb9648f8678890b9e1d0add97e2191bc7767", kill_on_drop: false }`
[INFO] [stdout] 4481bf7160d1e7577c54b849b6bebb9648f8678890b9e1d0add97e2191bc7767
[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] 828a1a6194a4fb668f42ec7d1cd575eca5cbb9f5cafa76f1f53e618fe3ef9da7
[INFO] running `Command { std: "docker" "start" "-a" "828a1a6194a4fb668f42ec7d1cd575eca5cbb9f5cafa76f1f53e618fe3ef9da7", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking tensile v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `future` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 |     future::{self, BoxFuture},
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] 12 |     pin_mut,
[INFO] [stdout] 13 |     prelude::*,
[INFO] [stdout]    |     ---------- the item `future` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `future` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 |     future::{self, BoxFuture},
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] 12 |     pin_mut,
[INFO] [stdout] 13 |     prelude::*,
[INFO] [stdout]    |     ---------- the item `future` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:605:9
[INFO] [stdout]     |
[INFO] [stdout] 605 |     use tokio;
[INFO] [stdout]     |         ^^^^^ the item `tokio` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning 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 6.59s
[INFO] running `Command { std: "docker" "inspect" "828a1a6194a4fb668f42ec7d1cd575eca5cbb9f5cafa76f1f53e618fe3ef9da7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "828a1a6194a4fb668f42ec7d1cd575eca5cbb9f5cafa76f1f53e618fe3ef9da7", kill_on_drop: false }`
[INFO] [stdout] 828a1a6194a4fb668f42ec7d1cd575eca5cbb9f5cafa76f1f53e618fe3ef9da7