[INFO] cloning repository https://github.com/timgluz/aima_8slide
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/timgluz/aima_8slide" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimgluz%2Faima_8slide", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimgluz%2Faima_8slide'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f9a9737d12c25bb5be7ccbd3e1cd2bc8fe8f409c
[INFO] checking timgluz/aima_8slide against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimgluz%2Faima_8slide" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/timgluz/aima_8slide on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/timgluz/aima_8slide
[INFO] finished tweaking git repo https://github.com/timgluz/aima_8slide
[INFO] tweaked toml for git repo https://github.com/timgluz/aima_8slide written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/timgluz/aima_8slide already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61af19e35662ed624c954f72aa3e89dfc54e5703041ec9b2abb0cf49899bea06
[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" "61af19e35662ed624c954f72aa3e89dfc54e5703041ec9b2abb0cf49899bea06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61af19e35662ed624c954f72aa3e89dfc54e5703041ec9b2abb0cf49899bea06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61af19e35662ed624c954f72aa3e89dfc54e5703041ec9b2abb0cf49899bea06", kill_on_drop: false }`
[INFO] [stdout] 61af19e35662ed624c954f72aa3e89dfc54e5703041ec9b2abb0cf49899bea06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f93e16ec80d7db5d1e161dffb55772efa0edf0286d3e3d870f1d170311bcf89e
[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" "f93e16ec80d7db5d1e161dffb55772efa0edf0286d3e3d870f1d170311bcf89e", kill_on_drop: false }`
[INFO] [stderr]     Checking aima_8slide v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `SearchProblem`
[INFO] [stdout]  --> src/main.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | use search::{SearchNode, SearchProblem};
[INFO] [stdout]   |                          ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SearchProblem`
[INFO] [stdout]  --> src/main.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | use search::{SearchNode, SearchProblem};
[INFO] [stdout]   |                          ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `action`
[INFO] [stdout]    --> src/search/frontiers.rs:117:26
[INFO] [stdout]     |
[INFO] [stdout] 117 |         fn result(&self, action: &Action) -> Box<dyn SearchProblem> {
[INFO] [stdout]     |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_action`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_row`
[INFO] [stdout]    --> src/eight_puzzle.rs:197:12
[INFO] [stdout]     |
[INFO] [stdout] 197 |     pub fn from_row(state_row: PuzzleStateRow) -> Self {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `h`
[INFO] [stdout]    --> src/eight_puzzle.rs:218:8
[INFO] [stdout]     |
[INFO] [stdout] 218 |     fn h(&self) -> u8 {
[INFO] [stdout]     |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `debug_search_node`
[INFO] [stdout]    --> src/search/uninformed.rs:179:4
[INFO] [stdout]     |
[INFO] [stdout] 179 | fn debug_search_node(current_node: &SearchNode) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bidirectional`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Bidirectional,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `debug_search_node`
[INFO] [stdout]    --> src/search/uninformed.rs:179:4
[INFO] [stdout]     |
[INFO] [stdout] 179 | fn debug_search_node(current_node: &SearchNode) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bidirectional`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Bidirectional,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "f93e16ec80d7db5d1e161dffb55772efa0edf0286d3e3d870f1d170311bcf89e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f93e16ec80d7db5d1e161dffb55772efa0edf0286d3e3d870f1d170311bcf89e", kill_on_drop: false }`
[INFO] [stdout] f93e16ec80d7db5d1e161dffb55772efa0edf0286d3e3d870f1d170311bcf89e