[INFO] cloning repository https://github.com/xumarcus/minesweeper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xumarcus/minesweeper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxumarcus%2Fminesweeper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxumarcus%2Fminesweeper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e0a6e215d07071c5702b8888c8d25f13c095b197
[INFO] checking xumarcus/minesweeper against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxumarcus%2Fminesweeper" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/xumarcus/minesweeper
[INFO] finished tweaking git repo https://github.com/xumarcus/minesweeper
[INFO] tweaked toml for git repo https://github.com/xumarcus/minesweeper written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/xumarcus/minesweeper on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/xumarcus/minesweeper 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simple_logger v1.11.0
[INFO] [stderr]   Downloaded wyz v0.4.0
[INFO] [stderr]   Downloaded funty v1.2.0
[INFO] [stderr]   Downloaded bitvec v0.22.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1876a9f2596eb4b5649f06e88037b2e34c240500180ad2dc25c744542fe158c
[INFO] running `Command { std: "docker" "start" "-a" "c1876a9f2596eb4b5649f06e88037b2e34c240500180ad2dc25c744542fe158c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1876a9f2596eb4b5649f06e88037b2e34c240500180ad2dc25c744542fe158c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1876a9f2596eb4b5649f06e88037b2e34c240500180ad2dc25c744542fe158c", kill_on_drop: false }`
[INFO] [stdout] c1876a9f2596eb4b5649f06e88037b2e34c240500180ad2dc25c744542fe158c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d1b397bff3d20b64108c5f485cf38a685a9e45b739dc1553c3c48f85d0e3cb4
[INFO] running `Command { std: "docker" "start" "-a" "8d1b397bff3d20b64108c5f485cf38a685a9e45b739dc1553c3c48f85d0e3cb4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking funty v1.2.0
[INFO] [stderr]     Checking arrayvec v0.7.1
[INFO] [stderr]     Checking strum v0.21.0
[INFO] [stderr]     Checking wyz v0.4.0
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking bitvec v0.22.3
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking noisy_float v0.2.0
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking simple_logger v1.11.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking minesweeper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `config` is never read
[INFO] [stdout]   --> src/solve.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Solver {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 22 |     config: Config,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Solver` has derived impls for the traits `Debug` and `Clone`, 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 `config` is never read
[INFO] [stdout]   --> src/solve.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Solver {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 22 |     config: Config,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Solver` has derived impls for the traits `Debug` and `Clone`, 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: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/solve.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             drop(x);
[INFO] [stdout]     |             ^^^^^-^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `(NoisyFloat<f64, FiniteChecker>, usize)`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 204 -             drop(x);
[INFO] [stdout] 204 +             let _ = x;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/solve.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             drop(x);
[INFO] [stdout]     |             ^^^^^-^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `(NoisyFloat<f64, FiniteChecker>, usize)`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 204 -             drop(x);
[INFO] [stdout] 204 +             let _ = x;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> benches/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(test)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `minesweeper` (bench "lib") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "8d1b397bff3d20b64108c5f485cf38a685a9e45b739dc1553c3c48f85d0e3cb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d1b397bff3d20b64108c5f485cf38a685a9e45b739dc1553c3c48f85d0e3cb4", kill_on_drop: false }`
[INFO] [stdout] 8d1b397bff3d20b64108c5f485cf38a685a9e45b739dc1553c3c48f85d0e3cb4
