[INFO] cloning repository https://github.com/komori-n/rust-crawler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/komori-n/rust-crawler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkomori-n%2Frust-crawler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkomori-n%2Frust-crawler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 95bd5c97bda111d2fdd0e757a360f3fb1c07c277
[INFO] testing komori-n/rust-crawler against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkomori-n%2Frust-crawler" "/workspace/builds/worker-23/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-23/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/komori-n/rust-crawler on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/komori-n/rust-crawler
[INFO] finished tweaking git repo https://github.com/komori-n/rust-crawler
[INFO] tweaked toml for git repo https://github.com/komori-n/rust-crawler written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate git repo https://github.com/komori-n/rust-crawler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded select v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 95af2b64593ad7927bfb3d4bc4a5597567a0dd847a6373c704b7d977e76f6fef
[INFO] running `Command { std: "docker" "start" "-a" "95af2b64593ad7927bfb3d4bc4a5597567a0dd847a6373c704b7d977e76f6fef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95af2b64593ad7927bfb3d4bc4a5597567a0dd847a6373c704b7d977e76f6fef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95af2b64593ad7927bfb3d4bc4a5597567a0dd847a6373c704b7d977e76f6fef", kill_on_drop: false }`
[INFO] [stdout] 95af2b64593ad7927bfb3d4bc4a5597567a0dd847a6373c704b7d977e76f6fef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8246c9ba73133e950262711463d7f8635453dfc8b501b200daa4d0596b0064c
[INFO] running `Command { std: "docker" "start" "-a" "f8246c9ba73133e950262711463d7f8635453dfc8b501b200daa4d0596b0064c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling slab v0.4.3
[INFO] [stderr]    Compiling futures-core v0.3.14
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling pin-project-lite v0.1.12
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling openssl v0.10.34
[INFO] [stderr]    Compiling utf-8 v0.7.6
[INFO] [stderr]    Compiling futures-sink v0.3.14
[INFO] [stderr]    Compiling httparse v1.4.0
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]    Compiling futures-task v0.3.14
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling futures-io v0.3.14
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling tower-service v0.3.1
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling ipnet v2.3.0
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling tracing-core v0.1.18
[INFO] [stderr]    Compiling unicode-bidi v0.3.5
[INFO] [stderr]    Compiling futures-channel v0.3.14
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling tinyvec v1.2.0
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling http v0.2.4
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling openssl-sys v0.9.63
[INFO] [stderr]    Compiling unicode-normalization v0.1.17
[INFO] [stderr]    Compiling tracing v0.1.26
[INFO] [stderr]    Compiling futures-util v0.3.14
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling tendril v0.4.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling string_cache v0.8.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling tokio v0.2.25
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling env_logger v0.8.3
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling markup5ever v0.10.1
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-tls v0.3.1
[INFO] [stderr]    Compiling xml5ever v0.16.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling pin-project v1.0.7
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling h2 v0.2.7
[INFO] [stderr]    Compiling markup5ever_rcdom v0.1.0
[INFO] [stderr]    Compiling select v0.5.0
[INFO] [stderr]    Compiling hyper v0.13.10
[INFO] [stderr]    Compiling hyper-tls v0.4.3
[INFO] [stderr]    Compiling reqwest v0.10.10
[INFO] [stderr]    Compiling rust-crawler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `err_source` is never read
[INFO] [stdout]   --> src/lib.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 err_source = err.source();
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `App`
[INFO] [stdout]  --> src/main.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use clap::{value_t, App, Arg};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 21s
[INFO] running `Command { std: "docker" "inspect" "f8246c9ba73133e950262711463d7f8635453dfc8b501b200daa4d0596b0064c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8246c9ba73133e950262711463d7f8635453dfc8b501b200daa4d0596b0064c", kill_on_drop: false }`
[INFO] [stdout] f8246c9ba73133e950262711463d7f8635453dfc8b501b200daa4d0596b0064c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52548c9a205856a340ce050184d4eb298054db9b740d212b24017d146cd11910
[INFO] running `Command { std: "docker" "start" "-a" "52548c9a205856a340ce050184d4eb298054db9b740d212b24017d146cd11910", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `err_source` is never read
[INFO] [stdout]   --> src/lib.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 err_source = err.source();
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-crawler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `App`
[INFO] [stdout]  --> src/main.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use clap::{value_t, App, Arg};
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `err_source` is never read
[INFO] [stdout]   --> src/lib.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 err_source = err.source();
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.47s
[INFO] running `Command { std: "docker" "inspect" "52548c9a205856a340ce050184d4eb298054db9b740d212b24017d146cd11910", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52548c9a205856a340ce050184d4eb298054db9b740d212b24017d146cd11910", kill_on_drop: false }`
[INFO] [stdout] 52548c9a205856a340ce050184d4eb298054db9b740d212b24017d146cd11910
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c8aec877b7bcbff6c80373971478b08ed2d24b3b76ce424c12eeddebc1c75b20
[INFO] running `Command { std: "docker" "start" "-a" "c8aec877b7bcbff6c80373971478b08ed2d24b3b76ce424c12eeddebc1c75b20", 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] warning: value assigned to `err_source` is never read
[INFO] [stderr]   --> src/lib.rs:87:17
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 err_source = err.source();
[INFO] [stderr]    |                 ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-crawler` (lib) generated 1 warning
[INFO] [stderr] warning: `rust-crawler` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: unused import: `App`
[INFO] [stderr]  --> src/main.rs:7:21
[INFO] [stderr]   |
[INFO] [stderr] 7 | use clap::{value_t, App, Arg};
[INFO] [stderr]   |                     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-crawler` (bin "rust-crawler" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.88s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_crawler-8d690bf595453e09)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test crawler::test::bfs ... ok
[INFO] [stdout] test crawler::test::bfs2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_crawler-c5c13fb597787277)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust-crawler
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c8aec877b7bcbff6c80373971478b08ed2d24b3b76ce424c12eeddebc1c75b20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8aec877b7bcbff6c80373971478b08ed2d24b3b76ce424c12eeddebc1c75b20", kill_on_drop: false }`
[INFO] [stdout] c8aec877b7bcbff6c80373971478b08ed2d24b3b76ce424c12eeddebc1c75b20