[INFO] cloning repository https://github.com/yukimura45z/pagerank-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yukimura45z/pagerank-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyukimura45z%2Fpagerank-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyukimura45z%2Fpagerank-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c069cea0ffa492f860ec7b4229e3e98da37698fa
[INFO] checking yukimura45z/pagerank-rust against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyukimura45z%2Fpagerank-rust" "/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/yukimura45z/pagerank-rust on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yukimura45z/pagerank-rust
[INFO] finished tweaking git repo https://github.com/yukimura45z/pagerank-rust
[INFO] tweaked toml for git repo https://github.com/yukimura45z/pagerank-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/yukimura45z/pagerank-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2aa5a9ff0034075f0232315f667e0423fa8350817a518aed2cc731b496a74c8b
[INFO] running `Command { std: "docker" "start" "-a" "2aa5a9ff0034075f0232315f667e0423fa8350817a518aed2cc731b496a74c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2aa5a9ff0034075f0232315f667e0423fa8350817a518aed2cc731b496a74c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2aa5a9ff0034075f0232315f667e0423fa8350817a518aed2cc731b496a74c8b", kill_on_drop: false }`
[INFO] [stdout] 2aa5a9ff0034075f0232315f667e0423fa8350817a518aed2cc731b496a74c8b
[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" "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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b3b9b3144d0cd822f2649ad09e7438fa1bbba5b6cea200d11542231db2d3cc3
[INFO] running `Command { std: "docker" "start" "-a" "5b3b9b3144d0cd822f2649ad09e7438fa1bbba5b6cea200d11542231db2d3cc3", kill_on_drop: false }`
[INFO] [stderr]     Checking pagerank-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `score` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/lib.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 31 |       let dst_current_score = score.get(dst).unwrap_or(&0f64);
[INFO] [stdout]    |                               ----- immutable borrow occurs here
[INFO] [stdout] 32 |       let src_current_score = current_score_vector.get(src).unwrap_or(&0f64);
[INFO] [stdout] 33 |       &score.insert(dst.to_string(), *dst_current_score + *src_current_score * *value);
[INFO] [stdout]    |        ^^^^^                         ------------------ immutable borrow later used here
[INFO] [stdout]    |        |
[INFO] [stdout]    |        mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:33:7
[INFO] [stdout]    |
[INFO] [stdout] 33 |       &score.insert(dst.to_string(), *dst_current_score + *src_current_score * *value);
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `score` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/lib.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 31 |       let dst_current_score = score.get(dst).unwrap_or(&0f64);
[INFO] [stdout]    |                               ----- immutable borrow occurs here
[INFO] [stdout] 32 |       let src_current_score = current_score_vector.get(src).unwrap_or(&0f64);
[INFO] [stdout] 33 |       &score.insert(dst.to_string(), *dst_current_score + *src_current_score * *value);
[INFO] [stdout]    |        ^^^^^                         ------------------ immutable borrow later used here
[INFO] [stdout]    |        |
[INFO] [stdout]    |        mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:33:7
[INFO] [stdout]    |
[INFO] [stdout] 33 |       &score.insert(dst.to_string(), *dst_current_score + *src_current_score * *value);
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "5b3b9b3144d0cd822f2649ad09e7438fa1bbba5b6cea200d11542231db2d3cc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b3b9b3144d0cd822f2649ad09e7438fa1bbba5b6cea200d11542231db2d3cc3", kill_on_drop: false }`
[INFO] [stdout] 5b3b9b3144d0cd822f2649ad09e7438fa1bbba5b6cea200d11542231db2d3cc3