[INFO] cloning repository https://github.com/SpadeA-Tang/skiplist-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SpadeA-Tang/skiplist-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpadeA-Tang%2Fskiplist-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpadeA-Tang%2Fskiplist-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a9d27501ddfc17d6df9afababcaa6280f1af9e77
[INFO] checking SpadeA-Tang/skiplist-rs/a9d27501ddfc17d6df9afababcaa6280f1af9e77 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpadeA-Tang%2Fskiplist-rs" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SpadeA-Tang/skiplist-rs on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SpadeA-Tang/skiplist-rs
[INFO] finished tweaking git repo https://github.com/SpadeA-Tang/skiplist-rs
[INFO] tweaked toml for git repo https://github.com/SpadeA-Tang/skiplist-rs written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/SpadeA-Tang/skiplist-rs 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fail v0.5.1
[INFO] [stderr]   Downloaded loom v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 543255a3bdb9f0bf32c9fe86cf70886623935fe9fac8fa96e9581c10206c0026
[INFO] running `Command { std: "docker" "start" "-a" "543255a3bdb9f0bf32c9fe86cf70886623935fe9fac8fa96e9581c10206c0026", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "543255a3bdb9f0bf32c9fe86cf70886623935fe9fac8fa96e9581c10206c0026", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "543255a3bdb9f0bf32c9fe86cf70886623935fe9fac8fa96e9581c10206c0026", kill_on_drop: false }`
[INFO] [stdout] 543255a3bdb9f0bf32c9fe86cf70886623935fe9fac8fa96e9581c10206c0026
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4112a6124e1e4656ffdeed1bb502ce19b08f7d64d5f79cfbe053517591d00a92
[INFO] running `Command { std: "docker" "start" "-a" "4112a6124e1e4656ffdeed1bb502ce19b08f7d64d5f79cfbe053517591d00a92", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking smallvec v1.13.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking scoped-tls v1.0.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking regex-automata v0.4.4
[INFO] [stderr]    Compiling tikv-jemalloc-sys v0.5.4+5.3.0-patched
[INFO] [stderr]    Compiling generator v0.7.5
[INFO] [stderr]     Checking fail v0.5.1
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking loom v0.7.1
[INFO] [stderr]     Checking tikv-jemalloc-ctl v0.5.4
[INFO] [stderr]     Checking tikv-jemallocator v0.5.4
[INFO] [stderr]     Checking skiplist-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `drop_key_value` is never used
[INFO] [stdout]    --> src/list.rs:124:8
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub trait ReclaimableNode {
[INFO] [stdout]     |           --------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn drop_key_value(&mut 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 `drop_key_value` is never used
[INFO] [stdout]    --> src/list.rs:124:8
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub trait ReclaimableNode {
[INFO] [stdout]     |           --------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn drop_key_value(&mut 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 2m 25s
[INFO] running `Command { std: "docker" "inspect" "4112a6124e1e4656ffdeed1bb502ce19b08f7d64d5f79cfbe053517591d00a92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4112a6124e1e4656ffdeed1bb502ce19b08f7d64d5f79cfbe053517591d00a92", kill_on_drop: false }`
[INFO] [stdout] 4112a6124e1e4656ffdeed1bb502ce19b08f7d64d5f79cfbe053517591d00a92