[INFO] fetching crate subway 0.1.2...
[INFO] testing subway-0.1.2 against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] extracting crate subway 0.1.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate subway 0.1.2 on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate subway 0.1.2
[INFO] finished tweaking crates.io crate subway 0.1.2
[INFO] tweaked toml for crates.io crate subway 0.1.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "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] 19783cc274e992d6534cc0b6f761f773ec81498d633391324f75dff969f00d72
[INFO] running `Command { std: "docker" "start" "-a" "19783cc274e992d6534cc0b6f761f773ec81498d633391324f75dff969f00d72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19783cc274e992d6534cc0b6f761f773ec81498d633391324f75dff969f00d72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19783cc274e992d6534cc0b6f761f773ec81498d633391324f75dff969f00d72", kill_on_drop: false }`
[INFO] [stdout] 19783cc274e992d6534cc0b6f761f773ec81498d633391324f75dff969f00d72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "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] 3d1df9aad83ad6d2ee8e9e46c24d4b846a7f086b5d601d4f06e7cb3b2e7ee43e
[INFO] running `Command { std: "docker" "start" "-a" "3d1df9aad83ad6d2ee8e9e46c24d4b846a7f086b5d601d4f06e7cb3b2e7ee43e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling subway v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `up`
[INFO] [stdout]   --> src/skiplist.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     up: WeakLink<K, V>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print`
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 574 |     fn print(&self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.10s
[INFO] running `Command { std: "docker" "inspect" "3d1df9aad83ad6d2ee8e9e46c24d4b846a7f086b5d601d4f06e7cb3b2e7ee43e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d1df9aad83ad6d2ee8e9e46c24d4b846a7f086b5d601d4f06e7cb3b2e7ee43e", kill_on_drop: false }`
[INFO] [stdout] 3d1df9aad83ad6d2ee8e9e46c24d4b846a7f086b5d601d4f06e7cb3b2e7ee43e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ded6bf0a3874717703a5a0c795a3b675b0bd687c3aa41214d88e21e5f29bcfdb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ded6bf0a3874717703a5a0c795a3b675b0bd687c3aa41214d88e21e5f29bcfdb", kill_on_drop: false }`
[INFO] [stderr]    Compiling subway v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `up`
[INFO] [stdout]   --> src/skiplist.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     up: WeakLink<K, V>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print`
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 574 |     fn print(&self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `up`
[INFO] [stdout]   --> src/skiplist.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     up: WeakLink<K, V>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print`
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 574 |     fn print(&self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.79s
[INFO] running `Command { std: "docker" "inspect" "ded6bf0a3874717703a5a0c795a3b675b0bd687c3aa41214d88e21e5f29bcfdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ded6bf0a3874717703a5a0c795a3b675b0bd687c3aa41214d88e21e5f29bcfdb", kill_on_drop: false }`
[INFO] [stdout] ded6bf0a3874717703a5a0c795a3b675b0bd687c3aa41214d88e21e5f29bcfdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 313a57f83b197aa2788747c76ec687b54f5199ce22ef7e9f67a413e96dfa448f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "313a57f83b197aa2788747c76ec687b54f5199ce22ef7e9f67a413e96dfa448f", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `up`
[INFO] [stderr]   --> src/skiplist.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     up: WeakLink<K, V>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print`
[INFO] [stderr]    --> src/skiplist.rs:574:8
[INFO] [stderr]     |
[INFO] [stderr] 574 |     fn print(&self) {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `up`
[INFO] [stderr]   --> src/skiplist.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     up: WeakLink<K, V>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print`
[INFO] [stderr]    --> src/skiplist.rs:574:8
[INFO] [stderr]     |
[INFO] [stderr] 574 |     fn print(&self) {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/subway-59c5e58c2cd77a32)
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test skiplist::tests::test_bisect_after ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_after_when_node_does_not_exist ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_after_when_insertion_point_is_at_end ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_after_with_last_node ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_when_key_does_not_exist ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_when_key_exists ... ok
[INFO] [stdout] test skiplist::tests::test_delete_from_level ... ok
[INFO] [stdout] test skiplist::tests::test_level_insert_after ... ok
[INFO] [stdout] test skiplist::tests::test_level_insert_after_tail ... ok
[INFO] [stdout] test skiplist::tests::test_level_is_sorted ... ok
[INFO] [stdout] test skiplist::tests::test_node ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist ... ok
[INFO] [stdout] test skiplist::tests::test_level ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist_delete ... ok
[INFO] [stdout] test skiplist::tests::test_level_insert ... ok
[INFO] [stdout] test skiplist::tests::test_bisect_after_larger_node ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist_insert ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist_get ... ok
[INFO] [stdout] test skiplist::tests::test_skiplist_sorted ... ok
[INFO] [stdout] test tests::test_bisect ... ok
[INFO] [stdout] test tests::test_operations ... ok
[INFO] [stdout] test tests::test_skiplist ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests subway
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K, V>::is_empty (line 492) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K, V>::new (line 274) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K, V>::get (line 347) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K, V>::len (line 476) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K, V>::bisect (line 411) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K, V>::insert (line 292) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K, V>::delete (line 384) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<K, V>::collect (line 450) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 4.39s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "313a57f83b197aa2788747c76ec687b54f5199ce22ef7e9f67a413e96dfa448f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "313a57f83b197aa2788747c76ec687b54f5199ce22ef7e9f67a413e96dfa448f", kill_on_drop: false }`
[INFO] [stdout] 313a57f83b197aa2788747c76ec687b54f5199ce22ef7e9f67a413e96dfa448f