[INFO] cloning repository https://github.com/tikv/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/tikv/skiplist-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftikv%2Fskiplist-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftikv%2Fskiplist-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbb04cffa14033a8e8bfddf245501db517f0f87b
[INFO] testing tikv/skiplist-rs against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftikv%2Fskiplist-rs" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tikv/skiplist-rs
[INFO] finished tweaking git repo https://github.com/tikv/skiplist-rs
[INFO] tweaked toml for git repo https://github.com/tikv/skiplist-rs written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tikv/skiplist-rs on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tikv/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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing tikv/skiplist-rs against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftikv%2Fskiplist-rs" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tikv/skiplist-rs
[INFO] finished tweaking git repo https://github.com/tikv/skiplist-rs
[INFO] tweaked toml for git repo https://github.com/tikv/skiplist-rs written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tikv/skiplist-rs on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tikv/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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", 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]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.19
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f5db360c21a00e5c80c06ab8d491f756643d5577c4bf175fa2ac96b0715462c
[INFO] running `Command { std: "docker" "start" "-a" "2f5db360c21a00e5c80c06ab8d491f756643d5577c4bf175fa2ac96b0715462c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f5db360c21a00e5c80c06ab8d491f756643d5577c4bf175fa2ac96b0715462c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f5db360c21a00e5c80c06ab8d491f756643d5577c4bf175fa2ac96b0715462c", kill_on_drop: false }`
[INFO] [stdout] 2f5db360c21a00e5c80c06ab8d491f756643d5577c4bf175fa2ac96b0715462c
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 522caebdeab20afd5d8a7a1d754aed1788c76eb064918225dc0a925064b6709e
[INFO] running `Command { std: "docker" "start" "-a" "522caebdeab20afd5d8a7a1d754aed1788c76eb064918225dc0a925064b6709e", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling skiplist-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stdout]     --> src/base.rs:2115:28
[INFO] [stdout]      |
[INFO] [stdout] 2115 |                 let next = (*self.node).tower[0].load(Ordering::Relaxed, epoch::unprotected());
[INFO] [stdout]      |                            ^^---------^^^^^^^^^^
[INFO] [stdout]      |                              |
[INFO] [stdout]      |                              this raw pointer has type `*mut Node<K, V>`
[INFO] [stdout]      |
[INFO] [stdout]      = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&Tower<K, V>`
[INFO] [stdout]     --> src/base.rs:2115:28
[INFO] [stdout]      |
[INFO] [stdout] 2115 |                 let next = (*self.node).tower[0].load(Ordering::Relaxed, epoch::unprotected());
[INFO] [stdout]      |                            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      = note: `#[deny(dangerous_implicit_autorefs)]` on by default
[INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit
[INFO] [stdout]      |
[INFO] [stdout] 2115 |                 let next = (&(*self.node).tower)[0].load(Ordering::Relaxed, epoch::unprotected());
[INFO] [stdout]      |                            ++                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stdout]     --> src/base.rs:2146:28
[INFO] [stdout]      |
[INFO] [stdout] 2146 |                 let next = (*self.node).tower[0].load(Ordering::Relaxed, epoch::unprotected());
[INFO] [stdout]      |                            ^^---------^^^^^^^^^^
[INFO] [stdout]      |                              |
[INFO] [stdout]      |                              this raw pointer has type `*mut Node<K, V>`
[INFO] [stdout]      |
[INFO] [stdout]      = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&Tower<K, V>`
[INFO] [stdout]     --> src/base.rs:2146:28
[INFO] [stdout]      |
[INFO] [stdout] 2146 |                 let next = (*self.node).tower[0].load(Ordering::Relaxed, epoch::unprotected());
[INFO] [stdout]      |                            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit
[INFO] [stdout]      |
[INFO] [stdout] 2146 |                 let next = (&(*self.node).tower)[0].load(Ordering::Relaxed, epoch::unprotected());
[INFO] [stdout]      |                            ++                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `skiplist-rs` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "522caebdeab20afd5d8a7a1d754aed1788c76eb064918225dc0a925064b6709e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "522caebdeab20afd5d8a7a1d754aed1788c76eb064918225dc0a925064b6709e", kill_on_drop: false }`
[INFO] [stdout] 522caebdeab20afd5d8a7a1d754aed1788c76eb064918225dc0a925064b6709e