[INFO] cloning repository https://github.com/jovinlidan/minesweeper-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jovinlidan/minesweeper-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjovinlidan%2Fminesweeper-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjovinlidan%2Fminesweeper-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5540edb68d819aea547f81cad828359e5402fff8
[INFO] checking jovinlidan/minesweeper-rs against try#23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 for pr-115950
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjovinlidan%2Fminesweeper-rs" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jovinlidan/minesweeper-rs on toolchain 23ffd2897cbb44320ca18dfe4d05dbacb37d55e0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jovinlidan/minesweeper-rs
[INFO] finished tweaking git repo https://github.com/jovinlidan/minesweeper-rs
[INFO] tweaked toml for git repo https://github.com/jovinlidan/minesweeper-rs written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/jovinlidan/minesweeper-rs 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" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 893a90f5736aa166c3ac55bdb6fc64142f6bc13a3781072a380e307ef8733328
[INFO] running `Command { std: "docker" "start" "-a" "893a90f5736aa166c3ac55bdb6fc64142f6bc13a3781072a380e307ef8733328", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "893a90f5736aa166c3ac55bdb6fc64142f6bc13a3781072a380e307ef8733328", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "893a90f5736aa166c3ac55bdb6fc64142f6bc13a3781072a380e307ef8733328", kill_on_drop: false }`
[INFO] [stdout] 893a90f5736aa166c3ac55bdb6fc64142f6bc13a3781072a380e307ef8733328
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01aa2f60cd5d58c1c75b9de949abe5436be4850bff4ddff47d4b7b0d5f970d3f
[INFO] running `Command { std: "docker" "start" "-a" "01aa2f60cd5d58c1c75b9de949abe5436be4850bff4ddff47d4b7b0d5f970d3f", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.87
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling bumpalo v3.13.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.87
[INFO] [stderr]    Compiling syn v2.0.29
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking console v0.15.7
[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]    Compiling wasm-bindgen-backend v0.2.87
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.87
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.87
[INFO] [stderr]     Checking minesweeper-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/minesweeper.rs:102:21
[INFO] [stdout]     |
[INFO] [stdout] 101 |                 for neighbor in self.iter_neighbors(position) {
[INFO] [stdout]     |                                 -----------------------------
[INFO] [stdout]     |                                 |
[INFO] [stdout]     |                                 immutable borrow occurs here
[INFO] [stdout]     |                                 immutable borrow later used here
[INFO] [stdout] 102 |                     self.open(neighbor);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/minesweeper.rs:102:21
[INFO] [stdout]     |
[INFO] [stdout] 101 |                 for neighbor in self.iter_neighbors(position) {
[INFO] [stdout]     |                                 -----------------------------
[INFO] [stdout]     |                                 |
[INFO] [stdout]     |                                 immutable borrow occurs here
[INFO] [stdout]     |                                 immutable borrow later used here
[INFO] [stdout] 102 |                     self.open(neighbor);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `minesweeper-rs` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `minesweeper-rs` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "01aa2f60cd5d58c1c75b9de949abe5436be4850bff4ddff47d4b7b0d5f970d3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01aa2f60cd5d58c1c75b9de949abe5436be4850bff4ddff47d4b7b0d5f970d3f", kill_on_drop: false }`
[INFO] [stdout] 01aa2f60cd5d58c1c75b9de949abe5436be4850bff4ddff47d4b7b0d5f970d3f