[INFO] fetching crate subway 0.1.2...
[INFO] checking subway-0.1.2 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate subway 0.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate subway 0.1.2 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.6.0)
[INFO] [stderr]       Adding cloudabi v0.0.3 (latest: v0.1.0)
[INFO] [stderr]       Adding rand v0.5.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8cd05cfe95b3aa181d412089436d22bb624b3f19e0525dd7672884c482ee5227
[INFO] running `Command { std: "docker" "start" "-a" "8cd05cfe95b3aa181d412089436d22bb624b3f19e0525dd7672884c482ee5227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8cd05cfe95b3aa181d412089436d22bb624b3f19e0525dd7672884c482ee5227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cd05cfe95b3aa181d412089436d22bb624b3f19e0525dd7672884c482ee5227", kill_on_drop: false }`
[INFO] [stdout] 8cd05cfe95b3aa181d412089436d22bb624b3f19e0525dd7672884c482ee5227
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 72d511690455adaa94f0debde552563d573bd432169aab5c10ed56d4818c57f4
[INFO] running `Command { std: "docker" "start" "-a" "72d511690455adaa94f0debde552563d573bd432169aab5c10ed56d4818c57f4", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking subway v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | / impl<K, V> SkipList<K, V>
[INFO] [stdout] 267 | | where
[INFO] [stdout] 268 | |     K: Ord + Clone + Display,
[INFO] [stdout] 269 | |     V: Clone,
[INFO] [stdout]     | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 574 |       fn print(&self) {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | / impl<K, V> SkipList<K, V>
[INFO] [stdout] 267 | | where
[INFO] [stdout] 268 | |     K: Ord + Clone + Display,
[INFO] [stdout] 269 | |     V: Clone,
[INFO] [stdout]     | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 574 |       fn print(&self) {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `Command { std: "docker" "inspect" "72d511690455adaa94f0debde552563d573bd432169aab5c10ed56d4818c57f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72d511690455adaa94f0debde552563d573bd432169aab5c10ed56d4818c57f4", kill_on_drop: false }`
[INFO] [stdout] 72d511690455adaa94f0debde552563d573bd432169aab5c10ed56d4818c57f4
[INFO] checking subway-0.1.2 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] extracting crate subway 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate subway 0.1.2 on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.6.0)
[INFO] [stderr]       Adding cloudabi v0.0.3 (latest: v0.1.0)
[INFO] [stderr]       Adding rand v0.5.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1174b3e589b62ee5c3cb8e7a270a1a9fb7301e5d9fc5087b721476a8d3943728
[INFO] running `Command { std: "docker" "start" "-a" "1174b3e589b62ee5c3cb8e7a270a1a9fb7301e5d9fc5087b721476a8d3943728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1174b3e589b62ee5c3cb8e7a270a1a9fb7301e5d9fc5087b721476a8d3943728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1174b3e589b62ee5c3cb8e7a270a1a9fb7301e5d9fc5087b721476a8d3943728", kill_on_drop: false }`
[INFO] [stdout] 1174b3e589b62ee5c3cb8e7a270a1a9fb7301e5d9fc5087b721476a8d3943728
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f78041b60276df18a2cd486fa759419048acd81727a703ee577fc3e66de8328
[INFO] running `Command { std: "docker" "start" "-a" "0f78041b60276df18a2cd486fa759419048acd81727a703ee577fc3e66de8328", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking subway v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | / impl<K, V> SkipList<K, V>
[INFO] [stdout] 267 | | where
[INFO] [stdout] 268 | |     K: Ord + Clone + Display,
[INFO] [stdout] 269 | |     V: Clone,
[INFO] [stdout]     | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 574 |       fn print(&self) {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]    --> src/skiplist.rs:574:8
[INFO] [stdout]     |
[INFO] [stdout] 266 | / impl<K, V> SkipList<K, V>
[INFO] [stdout] 267 | | where
[INFO] [stdout] 268 | |     K: Ord + Clone + Display,
[INFO] [stdout] 269 | |     V: Clone,
[INFO] [stdout]     | |_____________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 574 |       fn print(&self) {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "0f78041b60276df18a2cd486fa759419048acd81727a703ee577fc3e66de8328", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f78041b60276df18a2cd486fa759419048acd81727a703ee577fc3e66de8328", kill_on_drop: false }`
[INFO] [stdout] 0f78041b60276df18a2cd486fa759419048acd81727a703ee577fc3e66de8328