[INFO] cloning repository https://github.com/GTxx/learn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GTxx/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGTxx%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGTxx%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b4dc2ad0d71f20b8eb03792f5b8269ce8d7cb321
[INFO] checking GTxx/learn_rust against master#4fb54ed484e2239a3e9eff3be17df00d2a162be3 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGTxx%2Flearn_rust" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GTxx/learn_rust on toolchain 4fb54ed484e2239a3e9eff3be17df00d2a162be3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/GTxx/learn_rust
[INFO] finished tweaking git repo https://github.com/GTxx/learn_rust
[INFO] tweaked toml for git repo https://github.com/GTxx/learn_rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/GTxx/learn_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15399ad8b209dc475187d276942942b018e5b2a146bf32757cf539a3e67e5e0f
[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" "15399ad8b209dc475187d276942942b018e5b2a146bf32757cf539a3e67e5e0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15399ad8b209dc475187d276942942b018e5b2a146bf32757cf539a3e67e5e0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15399ad8b209dc475187d276942942b018e5b2a146bf32757cf539a3e67e5e0f", kill_on_drop: false }`
[INFO] [stdout] 15399ad8b209dc475187d276942942b018e5b2a146bf32757cf539a3e67e5e0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7d0bdf0d7bd0e13e95405cf81ccb0923e763bdce86f9a9ec7d750f202f3997f
[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" "f7d0bdf0d7bd0e13e95405cf81ccb0923e763bdce86f9a9ec7d750f202f3997f", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0603]: function `find_queen_position` is private
[INFO] [stdout]   --> src/main.rs:5:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | use queen::find_queen_position; 
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^ private function
[INFO] [stdout]    |
[INFO] [stdout] note: the function `find_queen_position` is defined here
[INFO] [stdout]   --> src/queen.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn find_queen_position(result: Vec<Location>, row: i8) -> HashSet<i8>{
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: function `find_queen_position` is private
[INFO] [stdout]   --> src/main.rs:5:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | use queen::find_queen_position; 
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^ private function
[INFO] [stdout]    |
[INFO] [stdout] note: the function `find_queen_position` is defined here
[INFO] [stdout]   --> src/queen.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn find_queen_position(result: Vec<Location>, row: i8) -> HashSet<i8>{
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/queen.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn find_queen_position(result: Vec<Location>, row: i8) -> HashSet<i8>{
[INFO] [stdout]    |                                                           ----------- expected `std::collections::HashSet<i8>` because of return type
[INFO] [stdout] ...
[INFO] [stdout] 26 |     return available_col.difference(&disabled_col)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `std::collections::HashSet`, found struct `std::collections::hash_set::Difference`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `std::collections::HashSet<i8>`
[INFO] [stdout]               found struct `std::collections::hash_set::Difference<'_, i8, std::collections::hash_map::RandomState>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0603.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn_rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/queen.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn find_queen_position(result: Vec<Location>, row: i8) -> HashSet<i8>{
[INFO] [stdout]    |                                                           ----------- expected `std::collections::HashSet<i8>` because of return type
[INFO] [stdout] ...
[INFO] [stdout] 26 |     return available_col.difference(&disabled_col)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `std::collections::HashSet`, found struct `std::collections::hash_set::Difference`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `std::collections::HashSet<i8>`
[INFO] [stdout]               found struct `std::collections::hash_set::Difference<'_, i8, std::collections::hash_map::RandomState>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0603.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f7d0bdf0d7bd0e13e95405cf81ccb0923e763bdce86f9a9ec7d750f202f3997f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7d0bdf0d7bd0e13e95405cf81ccb0923e763bdce86f9a9ec7d750f202f3997f", kill_on_drop: false }`
[INFO] [stdout] f7d0bdf0d7bd0e13e95405cf81ccb0923e763bdce86f9a9ec7d750f202f3997f