[INFO] cloning repository https://github.com/huyiwen/search-engine-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/huyiwen/search-engine-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuyiwen%2Fsearch-engine-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuyiwen%2Fsearch-engine-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4acea70a9ed44c9eeafba38e8cec6628341cd35c
[INFO] checking huyiwen/search-engine-in-rust against try#a75eafceea413a1b40c0e0769db85e08ec17160b for pr-133925
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuyiwen%2Fsearch-engine-in-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/huyiwen/search-engine-in-rust on toolchain a75eafceea413a1b40c0e0769db85e08ec17160b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a75eafceea413a1b40c0e0769db85e08ec17160b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/huyiwen/search-engine-in-rust
[INFO] finished tweaking git repo https://github.com/huyiwen/search-engine-in-rust
[INFO] tweaked toml for git repo https://github.com/huyiwen/search-engine-in-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/huyiwen/search-engine-in-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" "+a75eafceea413a1b40c0e0769db85e08ec17160b" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking huyiwen/search-engine-in-rust against try#a75eafceea413a1b40c0e0769db85e08ec17160b for pr-133925
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuyiwen%2Fsearch-engine-in-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/huyiwen/search-engine-in-rust on toolchain a75eafceea413a1b40c0e0769db85e08ec17160b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a75eafceea413a1b40c0e0769db85e08ec17160b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/huyiwen/search-engine-in-rust
[INFO] finished tweaking git repo https://github.com/huyiwen/search-engine-in-rust
[INFO] tweaked toml for git repo https://github.com/huyiwen/search-engine-in-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/huyiwen/search-engine-in-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" "+a75eafceea413a1b40c0e0769db85e08ec17160b" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simple-pagerank v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+a75eafceea413a1b40c0e0769db85e08ec17160b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "inspect" "7a1dc4c41395d2e12b1c6a4dae4e46ff8b0e1a7c2aa0f14b29ada5f615e3cebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a1dc4c41395d2e12b1c6a4dae4e46ff8b0e1a7c2aa0f14b29ada5f615e3cebb", kill_on_drop: false }`
[INFO] [stdout] 7a1dc4c41395d2e12b1c6a4dae4e46ff8b0e1a7c2aa0f14b29ada5f615e3cebb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+a75eafceea413a1b40c0e0769db85e08ec17160b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 014ff1385c67ecfc9512e6964f781d48cb802c3a89056d4242a2557668ac0b82
[INFO] running `Command { std: "docker" "start" "-a" "014ff1385c67ecfc9512e6964f781d48cb802c3a89056d4242a2557668ac0b82", kill_on_drop: false }`
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[INFO] [stderr]    Compiling openssl-sys v0.9.93
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[INFO] [stderr]    Compiling openssl-macros v0.1.1
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[INFO] [stderr]     Checking tokio v1.33.0
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[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.22
[INFO] [stderr]     Checking search-engine-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::os`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::os;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `search_engine_in_rust`
[INFO] [stdout]    --> src/main.rs:214:2
[INFO] [stdout]     |
[INFO] [stdout] 214 | }
[INFO] [stdout]     |  ^ consider adding a `main` function to `src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::os`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::os;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_CONCURRENT` is never used
[INFO] [stdout]   --> src/main.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const MAX_CONCURRENT: usize = 50;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `REQUEST_INTERVAL` is never used
[INFO] [stdout]   --> src/main.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 | const REQUEST_INTERVAL: u64 = 100; // ms
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HEADERS_LIST` is never used
[INFO] [stdout]   --> src/main.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | const HEADERS_LIST: [&'static str; 10] = [
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ALPHA` is never used
[INFO] [stdout]   --> src/main.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 | const ALPHA: f64 = 0.1;
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EPSILON` is never used
[INFO] [stdout]   --> src/main.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 | const EPSILON: f64 = 0.000001;
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_ITERATIONS` is never used
[INFO] [stdout]   --> src/main.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 | const MAX_ITERATIONS: usize = 1000;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `URL` is never constructed
[INFO] [stdout]   --> src/main.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct URL {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/main.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl URL {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 48 |     fn new<T, U>(url: T, id: U, crawled: bool) -> Self
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pagerank` is never used
[INFO] [stdout]   --> src/main.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn pagerank() -> Result<(), std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `crawl` is never used
[INFO] [stdout]    --> src/main.rs:134:10
[INFO] [stdout]     |
[INFO] [stdout] 134 | async fn crawl() {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `save_pagerank` is never used
[INFO] [stdout]    --> src/main.rs:165:4
[INFO] [stdout]     |
[INFO] [stdout] 165 | fn save_pagerank(nodes: Vec<(&usize, f64)>, links: Vec<&str>) -> std::io::Result<()> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_urls` is never used
[INFO] [stdout]    --> src/main.rs:174:4
[INFO] [stdout]     |
[INFO] [stdout] 174 | fn read_urls() -> Vec<URL> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `download` is never used
[INFO] [stdout]    --> src/main.rs:193:10
[INFO] [stdout]     |
[INFO] [stdout] 193 | async fn download(
[INFO] [stdout]     |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_random_header` is never used
[INFO] [stdout]    --> src/main.rs:210:4
[INFO] [stdout]     |
[INFO] [stdout] 210 | fn get_random_header() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     web_graph.set_damping_factor(((1f64 - ALPHA) * 100f64).floor() as u8);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let _ = web_graph.set_damping_factor(((1f64 - ALPHA) * 100f64).floor() as u8);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `search-engine-in-rust` (bin "search-engine-in-rust") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "014ff1385c67ecfc9512e6964f781d48cb802c3a89056d4242a2557668ac0b82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "014ff1385c67ecfc9512e6964f781d48cb802c3a89056d4242a2557668ac0b82", kill_on_drop: false }`
[INFO] [stdout] 014ff1385c67ecfc9512e6964f781d48cb802c3a89056d4242a2557668ac0b82