[INFO] cloning repository https://github.com/varghs/lists
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/varghs/lists" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvarghs%2Flists", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvarghs%2Flists'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dee5db6646c29c6789505a57c35296cf3f0de923
[INFO] checking varghs/lists against master#ca77504943887037504c7fc0b9bf06dab3910373 for pr-145181
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvarghs%2Flists" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/varghs/lists
[INFO] finished tweaking git repo https://github.com/varghs/lists
[INFO] tweaked toml for git repo https://github.com/varghs/lists written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/varghs/lists on toolchain ca77504943887037504c7fc0b9bf06dab3910373
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/varghs/lists 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" "+ca77504943887037504c7fc0b9bf06dab3910373" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ghost-cell v0.2.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23f8c0525f3410db3d9e1aca8664b31a8b01e01f8e41e6bde9eaed156512c34f
[INFO] running `Command { std: "docker" "start" "-a" "23f8c0525f3410db3d9e1aca8664b31a8b01e01f8e41e6bde9eaed156512c34f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23f8c0525f3410db3d9e1aca8664b31a8b01e01f8e41e6bde9eaed156512c34f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23f8c0525f3410db3d9e1aca8664b31a8b01e01f8e41e6bde9eaed156512c34f", kill_on_drop: false }`
[INFO] [stdout] 23f8c0525f3410db3d9e1aca8664b31a8b01e01f8e41e6bde9eaed156512c34f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+ca77504943887037504c7fc0b9bf06dab3910373" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebdea3a2448f358905417895008a2c70d1504b1d65351261a035222297d4612e
[INFO] running `Command { std: "docker" "start" "-a" "ebdea3a2448f358905417895008a2c70d1504b1d65351261a035222297d4612e", kill_on_drop: false }`
[INFO] [stderr]     Checking ghost-cell v0.2.6
[INFO] [stderr]     Checking lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `=` or `|`, found `}`
[INFO] [stdout]   --> src/fifth.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |         if let Some(mut old_tail_node)
[INFO] [stdout]    |                                       - expected one of `=` or `|`
[INFO] [stdout] 28 |     }
[INFO] [stdout]    |     ^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `=` or `|`, found `}`
[INFO] [stdout]   --> src/fifth.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |         if let Some(mut old_tail_node)
[INFO] [stdout]    |                                       - expected one of `=` or `|`
[INFO] [stdout] 28 |     }
[INFO] [stdout]    |     ^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/fifth.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `GhostCell` and `GhostToken`
[INFO] [stdout]  --> src/circular_ghost.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ghost_cell::{GhostCell, GhostToken};
[INFO] [stdout]   |                  ^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/fifth.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `GhostCell` and `GhostToken`
[INFO] [stdout]  --> src/circular_ghost.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ghost_cell::{GhostCell, GhostToken};
[INFO] [stdout]   |                  ^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lists` (lib) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `lists` (lib test) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ebdea3a2448f358905417895008a2c70d1504b1d65351261a035222297d4612e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebdea3a2448f358905417895008a2c70d1504b1d65351261a035222297d4612e", kill_on_drop: false }`
[INFO] [stdout] ebdea3a2448f358905417895008a2c70d1504b1d65351261a035222297d4612e