[INFO] cloning repository https://github.com/KittyNekoMeow/blackjack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KittyNekoMeow/blackjack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKittyNekoMeow%2Fblackjack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKittyNekoMeow%2Fblackjack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3e19e786927b2fb1c10638ec09042015f8a510b8
[INFO] checking KittyNekoMeow/blackjack 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%2FKittyNekoMeow%2Fblackjack" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/KittyNekoMeow/blackjack
[INFO] finished tweaking git repo https://github.com/KittyNekoMeow/blackjack
[INFO] tweaked toml for git repo https://github.com/KittyNekoMeow/blackjack written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/KittyNekoMeow/blackjack 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/KittyNekoMeow/blackjack 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 571de4cd9cd03502db7a1a5bf0301370b420e9a3545f2e8a7ba7fbb0fefd621f
[INFO] running `Command { std: "docker" "start" "-a" "571de4cd9cd03502db7a1a5bf0301370b420e9a3545f2e8a7ba7fbb0fefd621f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "571de4cd9cd03502db7a1a5bf0301370b420e9a3545f2e8a7ba7fbb0fefd621f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "571de4cd9cd03502db7a1a5bf0301370b420e9a3545f2e8a7ba7fbb0fefd621f", kill_on_drop: false }`
[INFO] [stdout] 571de4cd9cd03502db7a1a5bf0301370b420e9a3545f2e8a7ba7fbb0fefd621f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 0aadc3d2504ef8e130024edf60720e8366a53c3df4e8be0f628aa152edbcefa2
[INFO] running `Command { std: "docker" "start" "-a" "0aadc3d2504ef8e130024edf60720e8366a53c3df4e8be0f628aa152edbcefa2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking blackjack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `size` is never read
[INFO] [stdout]   --> src/def.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Shoe {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 25 |     pub size: i8,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Shoe` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `player_chips` is never read
[INFO] [stdout]  --> src/gamestate.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Gamestate {
[INFO] [stdout]   |            --------- field in this struct
[INFO] [stdout] 4 |     pub shoe: Shoe,
[INFO] [stdout] 5 |     pub player_chips: i32
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/def.rs:293:38
[INFO] [stdout]     |
[INFO] [stdout] 293 |     let player_input_clean: String = player_input.trim().parse().unwrap();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `blackjack` (bin "blackjack" test) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: field `size` is never read
[INFO] [stdout]   --> src/def.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Shoe {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 25 |     pub size: i8,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Shoe` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `player_chips` is never read
[INFO] [stdout]  --> src/gamestate.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Gamestate {
[INFO] [stdout]   |            --------- field in this struct
[INFO] [stdout] 4 |     pub shoe: Shoe,
[INFO] [stdout] 5 |     pub player_chips: i32
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/def.rs:293:38
[INFO] [stdout]     |
[INFO] [stdout] 293 |     let player_input_clean: String = player_input.trim().parse().unwrap();
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `blackjack` (bin "blackjack") due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0aadc3d2504ef8e130024edf60720e8366a53c3df4e8be0f628aa152edbcefa2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aadc3d2504ef8e130024edf60720e8366a53c3df4e8be0f628aa152edbcefa2", kill_on_drop: false }`
[INFO] [stdout] 0aadc3d2504ef8e130024edf60720e8366a53c3df4e8be0f628aa152edbcefa2