[INFO] cloning repository https://github.com/tchajed/r2048-ai
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tchajed/r2048-ai" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftchajed%2Fr2048-ai", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftchajed%2Fr2048-ai'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7716c5fabab0357748a24bc50e5d84d6afee6e0
[INFO] checking tchajed/r2048-ai against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftchajed%2Fr2048-ai" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tchajed/r2048-ai on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tchajed/r2048-ai
[INFO] finished tweaking git repo https://github.com/tchajed/r2048-ai
[INFO] tweaked toml for git repo https://github.com/tchajed/r2048-ai written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tchajed/r2048-ai 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_xorshift v0.3.0
[INFO] [stderr]   Downloaded rusty-fork v0.3.0
[INFO] [stderr]   Downloaded tinytemplate v1.2.1
[INFO] [stderr]   Downloaded bit-set v0.5.2
[INFO] [stderr]   Downloaded plotters-svg v0.3.1
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.80
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.80
[INFO] [stderr]   Downloaded clap_derive v3.1.18
[INFO] [stderr]   Downloaded os_str_bytes v6.1.0
[INFO] [stderr]   Downloaded clap_lex v0.2.0
[INFO] [stderr]   Downloaded criterion v0.3.5
[INFO] [stderr]   Downloaded which v4.2.5
[INFO] [stderr]   Downloaded indexmap v1.8.2
[INFO] [stderr]   Downloaded terminfo v0.7.3
[INFO] [stderr]   Downloaded clearscreen v1.0.10
[INFO] [stderr]   Downloaded clap v3.1.18
[INFO] [stderr]   Downloaded nix v0.24.1
[INFO] [stderr]   Downloaded web-sys v0.3.57
[INFO] [stderr]   Downloaded bstr v0.2.17
[INFO] [stderr]   Downloaded csv v1.1.6
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.80
[INFO] [stderr]   Downloaded regex v1.5.6
[INFO] [stderr]   Downloaded syn v1.0.95
[INFO] [stderr]   Downloaded proptest v1.0.0
[INFO] [stderr]   Downloaded semver v1.0.9
[INFO] [stderr]   Downloaded js-sys v0.3.57
[INFO] [stderr]   Downloaded serde_cbor v0.11.2
[INFO] [stderr]   Downloaded regex-syntax v0.6.26
[INFO] [stderr]   Downloaded cast v0.2.7
[INFO] [stderr]   Downloaded criterion-plot v0.4.4
[INFO] [stderr]   Downloaded plotters-backend v0.3.2
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.80
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.80
[INFO] [stderr]   Downloaded plotters v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 604ccc97c68d3962244154644e51e2b1103021403b057b125a41ce876cd8062a
[INFO] running `Command { std: "docker" "start" "-a" "604ccc97c68d3962244154644e51e2b1103021403b057b125a41ce876cd8062a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "604ccc97c68d3962244154644e51e2b1103021403b057b125a41ce876cd8062a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "604ccc97c68d3962244154644e51e2b1103021403b057b125a41ce876cd8062a", kill_on_drop: false }`
[INFO] [stdout] 604ccc97c68d3962244154644e51e2b1103021403b057b125a41ce876cd8062a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f974f35ae990603db6ee79a9547de8fd3d2e215e9c450c64b68e9cbf39cffd4
[INFO] running `Command { std: "docker" "start" "-a" "9f974f35ae990603db6ee79a9547de8fd3d2e215e9c450c64b68e9cbf39cffd4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling semver v1.0.9
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]     Checking os_str_bytes v6.1.0
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking clap_lex v0.2.0
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking which v4.2.5
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking nix v0.24.1
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling terminfo v0.7.3
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking proptest v1.0.0
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling clap_derive v3.1.18
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking clap v3.1.18
[INFO] [stderr]     Checking clearscreen v1.0.10
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stderr]     Checking r2048-ai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.45s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.5, nom v5.1.2, terminfo v0.7.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "9f974f35ae990603db6ee79a9547de8fd3d2e215e9c450c64b68e9cbf39cffd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f974f35ae990603db6ee79a9547de8fd3d2e215e9c450c64b68e9cbf39cffd4", kill_on_drop: false }`
[INFO] [stdout] 9f974f35ae990603db6ee79a9547de8fd3d2e215e9c450c64b68e9cbf39cffd4