[INFO] fetching crate minivec 0.3.0...
[INFO] checking minivec-0.3.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate minivec 0.3.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate minivec 0.3.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0fe7f67657d4e95657948b06d8401c28e31b3aa2490a7e703844112cca11e65
[INFO] running `Command { std: "docker" "start" "-a" "d0fe7f67657d4e95657948b06d8401c28e31b3aa2490a7e703844112cca11e65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0fe7f67657d4e95657948b06d8401c28e31b3aa2490a7e703844112cca11e65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0fe7f67657d4e95657948b06d8401c28e31b3aa2490a7e703844112cca11e65", kill_on_drop: false }`
[INFO] [stdout] d0fe7f67657d4e95657948b06d8401c28e31b3aa2490a7e703844112cca11e65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61cdc0b41df4827830d5f7f70b25e16196f8c70ceacc78cf0246a7c32dee5d38
[INFO] running `Command { std: "docker" "start" "-a" "61cdc0b41df4827830d5f7f70b25e16196f8c70ceacc78cf0246a7c32dee5d38", 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 1.25s
[INFO] running `Command { std: "docker" "inspect" "61cdc0b41df4827830d5f7f70b25e16196f8c70ceacc78cf0246a7c32dee5d38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61cdc0b41df4827830d5f7f70b25e16196f8c70ceacc78cf0246a7c32dee5d38", kill_on_drop: false }`
[INFO] [stdout] 61cdc0b41df4827830d5f7f70b25e16196f8c70ceacc78cf0246a7c32dee5d38