[INFO] cloning repository https://github.com/kallehed/BinaryHeap-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kallehed/BinaryHeap-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkallehed%2FBinaryHeap-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkallehed%2FBinaryHeap-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52b3b0c56b5e267a766b2d380feaa92bba0d96a8
[INFO] checking kallehed/BinaryHeap-Rust against master#8f08b3a32478b8d0507732800ecb548a76e0fd0c for pr-144157
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkallehed%2FBinaryHeap-Rust" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kallehed/BinaryHeap-Rust
[INFO] finished tweaking git repo https://github.com/kallehed/BinaryHeap-Rust
[INFO] tweaked toml for git repo https://github.com/kallehed/BinaryHeap-Rust written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kallehed/BinaryHeap-Rust on toolchain 8f08b3a32478b8d0507732800ecb548a76e0fd0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kallehed/BinaryHeap-Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07c3fd9410d62bf122a3b195d1c9a68dd5c86ea4a3f0080d188e97cbd0b021e9
[INFO] running `Command { std: "docker" "start" "-a" "07c3fd9410d62bf122a3b195d1c9a68dd5c86ea4a3f0080d188e97cbd0b021e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07c3fd9410d62bf122a3b195d1c9a68dd5c86ea4a3f0080d188e97cbd0b021e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07c3fd9410d62bf122a3b195d1c9a68dd5c86ea4a3f0080d188e97cbd0b021e9", kill_on_drop: false }`
[INFO] [stdout] 07c3fd9410d62bf122a3b195d1c9a68dd5c86ea4a3f0080d188e97cbd0b021e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3a872cf2a95c02afc397208310d9f94e75fa9bede4ce8e93a0bd7a82d8bb90a
[INFO] running `Command { std: "docker" "start" "-a" "a3a872cf2a95c02afc397208310d9f94e75fa9bede4ce8e93a0bd7a82d8bb90a", kill_on_drop: false }`
[INFO] [stderr]     Checking binaryheap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `flow_down_rec` is never used
[INFO] [stdout]   --> src/lib.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl<T: PartialOrd> BinaryHeap<T> {
[INFO] [stdout]    | --------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 75 |     fn flow_down_rec(&mut self, idx: usize, vec_len: usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `flow_down_rec` is never used
[INFO] [stdout]   --> src/lib.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl<T: PartialOrd> BinaryHeap<T> {
[INFO] [stdout]    | --------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 75 |     fn flow_down_rec(&mut self, idx: usize, vec_len: usize) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "a3a872cf2a95c02afc397208310d9f94e75fa9bede4ce8e93a0bd7a82d8bb90a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3a872cf2a95c02afc397208310d9f94e75fa9bede4ce8e93a0bd7a82d8bb90a", kill_on_drop: false }`
[INFO] [stdout] a3a872cf2a95c02afc397208310d9f94e75fa9bede4ce8e93a0bd7a82d8bb90a