[INFO] updating cached repository buntine/rust-crawler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/buntine/rust-crawler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/buntine/rust-crawler" "work/ex/beta-1.37-6/sources/1.36.0/gh/buntine/rust-crawler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/buntine/rust-crawler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/buntine/rust-crawler" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/buntine/rust-crawler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/buntine/rust-crawler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 92c3233cd0ee054ceb698b2fff4e72ce97c40063
[INFO] sha for GitHub repo buntine/rust-crawler: 92c3233cd0ee054ceb698b2fff4e72ce97c40063
[INFO] validating manifest of buntine/rust-crawler on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of buntine/rust-crawler on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing buntine/rust-crawler
[INFO] finished frobbing buntine/rust-crawler
[INFO] frobbed toml for buntine/rust-crawler written to work/ex/beta-1.37-6/sources/1.36.0/gh/buntine/rust-crawler/Cargo.toml
[INFO] started frobbing buntine/rust-crawler
[INFO] finished frobbing buntine/rust-crawler
[INFO] frobbed toml for buntine/rust-crawler written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/buntine/rust-crawler/Cargo.toml
[INFO] crate buntine/rust-crawler already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing buntine/rust-crawler against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/buntine/rust-crawler:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 8ec66c3ddb6d7914ef264c0a34cce1d871e7a287bae419da97cb683b42b29eec
[INFO] running `"docker" "start" "-a" "8ec66c3ddb6d7914ef264c0a34cce1d871e7a287bae419da97cb683b42b29eec"`
[INFO] [stderr]    Compiling rust-crawler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `depth`
[INFO] [stderr]   --> src/main.rs:18:37
[INFO] [stderr]    |
[INFO] [stderr] 18 |         fn parse_webpage(&mut self, depth: i32, path: &String) {
[INFO] [stderr]    |                                     ^^^^^ help: consider prefixing with an underscore: `_depth`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `visited`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |         visited: Vec<String>,
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "8ec66c3ddb6d7914ef264c0a34cce1d871e7a287bae419da97cb683b42b29eec"`
[INFO] running `"docker" "rm" "-f" "8ec66c3ddb6d7914ef264c0a34cce1d871e7a287bae419da97cb683b42b29eec"`
[INFO] [stdout] 8ec66c3ddb6d7914ef264c0a34cce1d871e7a287bae419da97cb683b42b29eec
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/buntine/rust-crawler:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 62de1b5c352a402df14f9d99934007c0459b9ae6ee777974c3ee84a89d9d3be9
[INFO] running `"docker" "start" "-a" "62de1b5c352a402df14f9d99934007c0459b9ae6ee777974c3ee84a89d9d3be9"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling rust-crawler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `depth`
[INFO] [stderr]   --> src/main.rs:18:37
[INFO] [stderr]    |
[INFO] [stderr] 18 |         fn parse_webpage(&mut self, depth: i32, path: &String) {
[INFO] [stderr]    |                                     ^^^^^ help: consider prefixing with an underscore: `_depth`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `visited`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |         visited: Vec<String>,
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "62de1b5c352a402df14f9d99934007c0459b9ae6ee777974c3ee84a89d9d3be9"`
[INFO] running `"docker" "rm" "-f" "62de1b5c352a402df14f9d99934007c0459b9ae6ee777974c3ee84a89d9d3be9"`
[INFO] [stdout] 62de1b5c352a402df14f9d99934007c0459b9ae6ee777974c3ee84a89d9d3be9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/buntine/rust-crawler:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] f6662917d38fab2b7ca5bc1765bccfeeebd1b7a4e9c9ba80d6b48e66685728db
[INFO] running `"docker" "start" "-a" "f6662917d38fab2b7ca5bc1765bccfeeebd1b7a4e9c9ba80d6b48e66685728db"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_crawler-6f6548a99d8df9ca
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f6662917d38fab2b7ca5bc1765bccfeeebd1b7a4e9c9ba80d6b48e66685728db"`
[INFO] running `"docker" "rm" "-f" "f6662917d38fab2b7ca5bc1765bccfeeebd1b7a4e9c9ba80d6b48e66685728db"`
[INFO] [stdout] f6662917d38fab2b7ca5bc1765bccfeeebd1b7a4e9c9ba80d6b48e66685728db