[INFO] fetching crate thin-vec 0.2.3...
[INFO] checking thin-vec-0.2.3 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] extracting crate thin-vec 0.2.3 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate thin-vec 0.2.3 on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate thin-vec 0.2.3
[INFO] finished tweaking crates.io crate thin-vec 0.2.3
[INFO] tweaked toml for crates.io crate thin-vec 0.2.3 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f136c59a0a135c7f76d4836ef7bfed9cc3b28acdff08fe0237274ead675185d
[INFO] running `Command { std: "docker" "start" "-a" "3f136c59a0a135c7f76d4836ef7bfed9cc3b28acdff08fe0237274ead675185d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f136c59a0a135c7f76d4836ef7bfed9cc3b28acdff08fe0237274ead675185d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f136c59a0a135c7f76d4836ef7bfed9cc3b28acdff08fe0237274ead675185d", kill_on_drop: false }`
[INFO] [stdout] 3f136c59a0a135c7f76d4836ef7bfed9cc3b28acdff08fe0237274ead675185d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb6205c67a83d0507ad1ec2151e9adfa74b33f7724c12fba4f6a3519bff68833
[INFO] running `Command { std: "docker" "start" "-a" "eb6205c67a83d0507ad1ec2151e9adfa74b33f7724c12fba4f6a3519bff68833", kill_on_drop: false }`
[INFO] [stderr]     Checking thin-vec v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1811:9
[INFO] [stdout]      |
[INFO] [stdout] 1811 |         &x[!0..];
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1818:9
[INFO] [stdout]      |
[INFO] [stdout] 1818 |         &x[..6];
[INFO] [stdout]      |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1825:9
[INFO] [stdout]      |
[INFO] [stdout] 1825 |         &x[!0..4];
[INFO] [stdout]      |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1832:9
[INFO] [stdout]      |
[INFO] [stdout] 1832 |         &x[1..6];
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/lib.rs:1839:9
[INFO] [stdout]      |
[INFO] [stdout] 1839 |         &x[3..2];
[INFO] [stdout]      |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "eb6205c67a83d0507ad1ec2151e9adfa74b33f7724c12fba4f6a3519bff68833", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb6205c67a83d0507ad1ec2151e9adfa74b33f7724c12fba4f6a3519bff68833", kill_on_drop: false }`
[INFO] [stdout] eb6205c67a83d0507ad1ec2151e9adfa74b33f7724c12fba4f6a3519bff68833