[INFO] cloning repository https://github.com/michaeleliot/RustChess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaeleliot/RustChess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaeleliot%2FRustChess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaeleliot%2FRustChess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c69893819dcca1e2c2c7b382187dbac54726bb16
[INFO] checking michaeleliot/RustChess against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaeleliot%2FRustChess" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/michaeleliot/RustChess
[INFO] finished tweaking git repo https://github.com/michaeleliot/RustChess
[INFO] tweaked toml for git repo https://github.com/michaeleliot/RustChess written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michaeleliot/RustChess on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/michaeleliot/RustChess already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2be6690a4816283e39f59906402d9ab9cbe5222da3ef94fbb494a4a0b83b921a
[INFO] running `Command { std: "docker" "start" "-a" "2be6690a4816283e39f59906402d9ab9cbe5222da3ef94fbb494a4a0b83b921a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2be6690a4816283e39f59906402d9ab9cbe5222da3ef94fbb494a4a0b83b921a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2be6690a4816283e39f59906402d9ab9cbe5222da3ef94fbb494a4a0b83b921a", kill_on_drop: false }`
[INFO] [stdout] 2be6690a4816283e39f59906402d9ab9cbe5222da3ef94fbb494a4a0b83b921a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e2673ea8313ff182cb707628f39da2fc2ec1a86a736b956794458612a5a69c1
[INFO] running `Command { std: "docker" "start" "-a" "8e2673ea8313ff182cb707628f39da2fc2ec1a86a736b956794458612a5a69c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:101:56
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let optional_winner_first_col = check_three_in_row([self.spaces[0], self.spaces[3], self.spaces[6]].try_into().unwrap());
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:102:57
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let optional_winner_second_col = check_three_in_row([self.spaces[1], self.spaces[4], self.spaces[7]].try_into().unwrap());
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:103:56
[INFO] [stdout]     |
[INFO] [stdout] 103 |     let optional_winner_third_col = check_three_in_row([self.spaces[2], self.spaces[5], self.spaces[8]].try_into().unwrap());
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:105:65
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let optional_winner_left_to_right_diag = check_three_in_row([self.spaces[0], self.spaces[4], self.spaces[8]].try_into().unwrap());
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:106:65
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let optional_winner_right_to_left_diag = check_three_in_row([self.spaces[2], self.spaces[4], self.spaces[6]].try_into().unwrap());
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello_world` (bin "hello_world" test) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:101:56
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let optional_winner_first_col = check_three_in_row([self.spaces[0], self.spaces[3], self.spaces[6]].try_into().unwrap());
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:102:57
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let optional_winner_second_col = check_three_in_row([self.spaces[1], self.spaces[4], self.spaces[7]].try_into().unwrap());
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:103:56
[INFO] [stdout]     |
[INFO] [stdout] 103 |     let optional_winner_third_col = check_three_in_row([self.spaces[2], self.spaces[5], self.spaces[8]].try_into().unwrap());
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:105:65
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let optional_winner_left_to_right_diag = check_three_in_row([self.spaces[0], self.spaces[4], self.spaces[8]].try_into().unwrap());
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[BoardSpaceState; 3], Infallible>
[INFO] [stdout]    --> src/board.rs:106:65
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let optional_winner_right_to_left_diag = check_three_in_row([self.spaces[2], self.spaces[4], self.spaces[6]].try_into().unwrap());
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello_world` (bin "hello_world") due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "8e2673ea8313ff182cb707628f39da2fc2ec1a86a736b956794458612a5a69c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e2673ea8313ff182cb707628f39da2fc2ec1a86a736b956794458612a5a69c1", kill_on_drop: false }`
[INFO] [stdout] 8e2673ea8313ff182cb707628f39da2fc2ec1a86a736b956794458612a5a69c1