[INFO] cloning repository https://github.com/lshlyapnikov/grokking-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lshlyapnikov/grokking-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flshlyapnikov%2Fgrokking-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flshlyapnikov%2Fgrokking-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5cce67cceb595b89af1df13426ddd9d453c86a06
[INFO] checking lshlyapnikov/grokking-rust against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flshlyapnikov%2Fgrokking-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lshlyapnikov/grokking-rust on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lshlyapnikov/grokking-rust
[INFO] removed workspace from git repo https://github.com/lshlyapnikov/grokking-rust
[INFO] finished tweaking git repo https://github.com/lshlyapnikov/grokking-rust
[INFO] tweaked toml for git repo https://github.com/lshlyapnikov/grokking-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/lshlyapnikov/grokking-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] 3a4ab025c8170d8449685cd6a583b7048309715c4c417acdc585580adbc7e3dd
[INFO] running `Command { std: "docker" "start" "-a" "3a4ab025c8170d8449685cd6a583b7048309715c4c417acdc585580adbc7e3dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a4ab025c8170d8449685cd6a583b7048309715c4c417acdc585580adbc7e3dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a4ab025c8170d8449685cd6a583b7048309715c4c417acdc585580adbc7e3dd", kill_on_drop: false }`
[INFO] [stdout] 3a4ab025c8170d8449685cd6a583b7048309715c4c417acdc585580adbc7e3dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4bdf6894e57b8876729ba6f1cba6acb0e3c406821b085d2b1d9a0e0cb780ba98
[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" "4bdf6894e57b8876729ba6f1cba6acb0e3c406821b085d2b1d9a0e0cb780ba98", kill_on_drop: false }`
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking kernel32-sys v0.2.2
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking quickcheck v0.2.27
[INFO] [stderr]     Checking grokking-rust v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `volumes`
[INFO] [stdout]   --> src/grok/waterpouring.rs:40:7
[INFO] [stdout]    |
[INFO] [stdout] 40 |   let volumes: Vec<usize> = vec![0, max_volumes.len()];
[INFO] [stdout]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_volumes`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `required_volume`
[INFO] [stdout]   --> src/grok/waterpouring.rs:39:40
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn solve(max_volumes: &Vec<usize>, required_volume: usize) -> State {
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_required_volume`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `volumes`
[INFO] [stdout]   --> src/grok/waterpouring.rs:40:7
[INFO] [stdout]    |
[INFO] [stdout] 40 |   let volumes: Vec<usize> = vec![0, max_volumes.len()];
[INFO] [stdout]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_volumes`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `required_volume`
[INFO] [stdout]   --> src/grok/waterpouring.rs:39:40
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn solve(max_volumes: &Vec<usize>, required_volume: usize) -> State {
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_required_volume`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fill`
[INFO] [stdout]  --> src/grok/waterpouring.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 5 |   Fill { glass: usize },
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Empty`
[INFO] [stdout]  --> src/grok/waterpouring.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   Empty { glass: usize },
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Transfer`
[INFO] [stdout]  --> src/grok/waterpouring.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 |   Transfer { from: usize, to: usize },
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve`
[INFO] [stdout]   --> src/grok/waterpouring.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn solve(max_volumes: &Vec<usize>, required_volume: usize) -> State {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Fill`
[INFO] [stdout]  --> src/grok/waterpouring.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 5 |   Fill { glass: usize },
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Empty`
[INFO] [stdout]  --> src/grok/waterpouring.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   Empty { glass: usize },
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Transfer`
[INFO] [stdout]  --> src/grok/waterpouring.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 |   Transfer { from: usize, to: usize },
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve`
[INFO] [stdout]   --> src/grok/waterpouring.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn solve(max_volumes: &Vec<usize>, required_volume: usize) -> State {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.94s
[INFO] running `Command { std: "docker" "inspect" "4bdf6894e57b8876729ba6f1cba6acb0e3c406821b085d2b1d9a0e0cb780ba98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bdf6894e57b8876729ba6f1cba6acb0e3c406821b085d2b1d9a0e0cb780ba98", kill_on_drop: false }`
[INFO] [stdout] 4bdf6894e57b8876729ba6f1cba6acb0e3c406821b085d2b1d9a0e0cb780ba98