[INFO] fetching crate ingrid 0.1.0...
[INFO] checking ingrid-0.1.0 against master#db870ea71b6dcc7a91b999420b88f41d3cdd13e1 for pr-75192
[INFO] extracting crate ingrid 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ingrid 0.1.0 on toolchain db870ea71b6dcc7a91b999420b88f41d3cdd13e1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ingrid 0.1.0
[INFO] finished tweaking crates.io crate ingrid 0.1.0
[INFO] tweaked toml for crates.io crate ingrid 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f461dff338cceed507e53c5f47e644b2fbe69c7ace258371940891cb3c528d20
[INFO] running `Command { std: "docker" "start" "-a" "f461dff338cceed507e53c5f47e644b2fbe69c7ace258371940891cb3c528d20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f461dff338cceed507e53c5f47e644b2fbe69c7ace258371940891cb3c528d20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f461dff338cceed507e53c5f47e644b2fbe69c7ace258371940891cb3c528d20", kill_on_drop: false }`
[INFO] [stdout] f461dff338cceed507e53c5f47e644b2fbe69c7ace258371940891cb3c528d20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5489818aa358103b3e121c5fc1e0c3afdd7921df56b3d19ae80cbdd084a82f11
[INFO] running `Command { std: "docker" "start" "-a" "5489818aa358103b3e121c5fc1e0c3afdd7921df56b3d19ae80cbdd084a82f11", kill_on_drop: false }`
[INFO] [stderr]     Checking ingrid v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `grid`
[INFO] [stdout]   --> src/cell.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     grid: &'a Grid<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `coordinate`
[INFO] [stdout]   --> src/cell.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     coordinate: Coordinate
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/row_mut.rs:757:13
[INFO] [stdout]     |
[INFO] [stdout] 757 |         let mut row = grid.row_mut(0);
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/row_mut.rs:761:13
[INFO] [stdout]     |
[INFO] [stdout] 761 |         let mut row = grid.row_mut(1);
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/column_mut.rs:800:13
[INFO] [stdout]     |
[INFO] [stdout] 800 |         let mut column = grid.column_mut(0);
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/column_mut.rs:804:13
[INFO] [stdout]     |
[INFO] [stdout] 804 |         let mut column = grid.column_mut(1);
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `grid`
[INFO] [stdout]   --> src/cell.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     grid: &'a Grid<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `coordinate`
[INFO] [stdout]   --> src/cell.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     coordinate: Coordinate
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.19s
[INFO] running `Command { std: "docker" "inspect" "5489818aa358103b3e121c5fc1e0c3afdd7921df56b3d19ae80cbdd084a82f11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5489818aa358103b3e121c5fc1e0c3afdd7921df56b3d19ae80cbdd084a82f11", kill_on_drop: false }`
[INFO] [stdout] 5489818aa358103b3e121c5fc1e0c3afdd7921df56b3d19ae80cbdd084a82f11