[INFO] fetching crate minivec 0.3.0...
[INFO] checking minivec-0.3.0 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] extracting crate minivec 0.3.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate minivec 0.3.0 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 minivec 0.3.0
[INFO] finished tweaking crates.io crate minivec 0.3.0
[INFO] tweaked toml for crates.io crate minivec 0.3.0 written to /workspace/builds/worker-8/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] a0d156fa0c37f738958527855539c5d4d0f413bd0c2315a18d42b62042c21efd
[INFO] running `Command { std: "docker" "start" "-a" "a0d156fa0c37f738958527855539c5d4d0f413bd0c2315a18d42b62042c21efd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0d156fa0c37f738958527855539c5d4d0f413bd0c2315a18d42b62042c21efd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0d156fa0c37f738958527855539c5d4d0f413bd0c2315a18d42b62042c21efd", kill_on_drop: false }`
[INFO] [stdout] a0d156fa0c37f738958527855539c5d4d0f413bd0c2315a18d42b62042c21efd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 08087821835d73c00e77ea37f825cb08942ee6c257943b5f7aa519331a1778b8
[INFO] running `Command { std: "docker" "start" "-a" "08087821835d73c00e77ea37f825cb08942ee6c257943b5f7aa519331a1778b8", kill_on_drop: false }`
[INFO] [stderr]     Checking minivec v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> tests/vec.rs:612:3
[INFO] [stdout]     |
[INFO] [stdout] 612 |   &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]    --> tests/vec.rs:619:3
[INFO] [stdout]     |
[INFO] [stdout] 619 |   &x[..6];
[INFO] [stdout]     |   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> tests/vec.rs:626:3
[INFO] [stdout]     |
[INFO] [stdout] 626 |   &x[!0..4];
[INFO] [stdout]     |   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> tests/vec.rs:633:3
[INFO] [stdout]     |
[INFO] [stdout] 633 |   &x[1..6];
[INFO] [stdout]     |   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> tests/vec.rs:640:3
[INFO] [stdout]     |
[INFO] [stdout] 640 |   &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 1.03s
[INFO] running `Command { std: "docker" "inspect" "08087821835d73c00e77ea37f825cb08942ee6c257943b5f7aa519331a1778b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08087821835d73c00e77ea37f825cb08942ee6c257943b5f7aa519331a1778b8", kill_on_drop: false }`
[INFO] [stdout] 08087821835d73c00e77ea37f825cb08942ee6c257943b5f7aa519331a1778b8