[INFO] fetching crate dancing-links 0.2.0...
[INFO] checking dancing-links-0.2.0 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate dancing-links 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate dancing-links 0.2.0 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dancing-links 0.2.0
[INFO] finished tweaking crates.io crate dancing-links 0.2.0
[INFO] tweaked toml for crates.io crate dancing-links 0.2.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05349f17b188ae77fff351b1c53399887af02132d9a5cc186ca59c2527a67213
[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" "05349f17b188ae77fff351b1c53399887af02132d9a5cc186ca59c2527a67213", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05349f17b188ae77fff351b1c53399887af02132d9a5cc186ca59c2527a67213", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05349f17b188ae77fff351b1c53399887af02132d9a5cc186ca59c2527a67213", kill_on_drop: false }`
[INFO] [stdout] 05349f17b188ae77fff351b1c53399887af02132d9a5cc186ca59c2527a67213
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8327ede01db9cb6dae071fcb4ba96a815b4e06682bd27e807dddfa7d0c6e6bd0
[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" "8327ede01db9cb6dae071fcb4ba96a815b4e06682bd27e807dddfa7d0c6e6bd0", kill_on_drop: false }`
[INFO] [stderr]     Checking bumpalo v3.8.0
[INFO] [stderr]     Checking dancing-links v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 132 |     add_direction!(add_below, down, up);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 134 |     add_direction!(add_above, up, down);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 136 |     add_direction!(add_right, right, left);
[INFO] [stdout]     |     -------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 132 |     add_direction!(add_below, down, up);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 134 |     add_direction!(add_above, up, down);
[INFO] [stdout]     |     ----------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/grid/base_node.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         #[$lint]
[INFO] [stdout]     |         ^^^^^^^^ help: remove this attribute
[INFO] [stdout] ...
[INFO] [stdout] 136 |     add_direction!(add_right, right, left);
[INFO] [stdout]     |     -------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: attribute `allow` with an empty list has no effect
[INFO] [stdout]     = note: this warning originates in the macro `add_direction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `min_column`
[INFO] [stdout]   --> src/solver.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     min_column: *mut Column,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `min_column`
[INFO] [stdout]   --> src/solver.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     min_column: *mut Column,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "8327ede01db9cb6dae071fcb4ba96a815b4e06682bd27e807dddfa7d0c6e6bd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8327ede01db9cb6dae071fcb4ba96a815b4e06682bd27e807dddfa7d0c6e6bd0", kill_on_drop: false }`
[INFO] [stdout] 8327ede01db9cb6dae071fcb4ba96a815b4e06682bd27e807dddfa7d0c6e6bd0