[INFO] cloning repository https://github.com/SaturnTeam/rust-algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SaturnTeam/rust-algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaturnTeam%2Frust-algorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaturnTeam%2Frust-algorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 285781471f85260557e7b4c7abe2a364be9dd5b8
[INFO] testing SaturnTeam/rust-algorithms against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSaturnTeam%2Frust-algorithms" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SaturnTeam/rust-algorithms on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SaturnTeam/rust-algorithms
[INFO] finished tweaking git repo https://github.com/SaturnTeam/rust-algorithms
[INFO] tweaked toml for git repo https://github.com/SaturnTeam/rust-algorithms written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/SaturnTeam/rust-algorithms already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1eda9757957c913838664aac7d91a5a80683d2ce120b000d0012a17755135c5b
[INFO] running `Command { std: "docker" "start" "-a" "1eda9757957c913838664aac7d91a5a80683d2ce120b000d0012a17755135c5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1eda9757957c913838664aac7d91a5a80683d2ce120b000d0012a17755135c5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eda9757957c913838664aac7d91a5a80683d2ce120b000d0012a17755135c5b", kill_on_drop: false }`
[INFO] [stdout] 1eda9757957c913838664aac7d91a5a80683d2ce120b000d0012a17755135c5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b875cbb8f41ffd4e1e620a1e1e51accb5f18b28ba24c68bd3dd8ecc951d4e46f
[INFO] running `Command { std: "docker" "start" "-a" "b875cbb8f41ffd4e1e620a1e1e51accb5f18b28ba24c68bd3dd8ecc951d4e46f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling a v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Rng`, `thread_rng`
[INFO] [stdout]  --> src/alg/max_pq.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | use self::rand::{thread_rng, Rng};
[INFO] [stdout]   |                  ^^^^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'core::str::<impl str>::trim_right': superseded by `trim_end`
[INFO] [stdout]    --> src/alg/uf.rs:182:28
[INFO] [stdout]     |
[INFO] [stdout] 182 |     let count = first_line.trim_right().parse::<usize>().unwrap();
[INFO] [stdout]     |                            ^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/alg/max_pq.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |             Err(MyError::new("Priority queue underflow"));
[INFO] [stdout]    |             ^^^ cannot infer type for type parameter `T` declared on the enum `Result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `a`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b875cbb8f41ffd4e1e620a1e1e51accb5f18b28ba24c68bd3dd8ecc951d4e46f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b875cbb8f41ffd4e1e620a1e1e51accb5f18b28ba24c68bd3dd8ecc951d4e46f", kill_on_drop: false }`
[INFO] [stdout] b875cbb8f41ffd4e1e620a1e1e51accb5f18b28ba24c68bd3dd8ecc951d4e46f