[INFO] fetching crate minivec 0.3.0...
[INFO] checking minivec-0.3.0 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate minivec 0.3.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate minivec 0.3.0 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "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-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "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" "+90442458ac46b1d5eed752c316da25450f67285b" "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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a658f769a196ccb1577ef62151dc27d77f1a655fcfe78c8e00e8228453f9698b
[INFO] running `Command { std: "docker" "start" "-a" "a658f769a196ccb1577ef62151dc27d77f1a655fcfe78c8e00e8228453f9698b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a658f769a196ccb1577ef62151dc27d77f1a655fcfe78c8e00e8228453f9698b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a658f769a196ccb1577ef62151dc27d77f1a655fcfe78c8e00e8228453f9698b", kill_on_drop: false }`
[INFO] [stdout] a658f769a196ccb1577ef62151dc27d77f1a655fcfe78c8e00e8228453f9698b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b448fe18e9ed17e7c09e93be7c2b879d8607c60400c2af111591d60b4733aec8
[INFO] running `Command { std: "docker" "start" "-a" "b448fe18e9ed17e7c09e93be7c2b879d8607c60400c2af111591d60b4733aec8", 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 1.11s
[INFO] running `Command { std: "docker" "inspect" "b448fe18e9ed17e7c09e93be7c2b879d8607c60400c2af111591d60b4733aec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b448fe18e9ed17e7c09e93be7c2b879d8607c60400c2af111591d60b4733aec8", kill_on_drop: false }`
[INFO] [stdout] b448fe18e9ed17e7c09e93be7c2b879d8607c60400c2af111591d60b4733aec8