[INFO] cloning repository https://github.com/EdSabino/sudoku_solution
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EdSabino/sudoku_solution" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdSabino%2Fsudoku_solution", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdSabino%2Fsudoku_solution'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f18128d0a664513f9d89b2690d3dd06fc2497427
[INFO] documenting EdSabino/sudoku_solution against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdSabino%2Fsudoku_solution" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EdSabino/sudoku_solution on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/EdSabino/sudoku_solution
[INFO] finished tweaking git repo https://github.com/EdSabino/sudoku_solution
[INFO] tweaked toml for git repo https://github.com/EdSabino/sudoku_solution written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/EdSabino/sudoku_solution 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b2888a0e63527e8ea333b233919006295d3af5ced6ab56926d2ec2fa0991c9b6
[INFO] running `Command { std: "docker" "start" "-a" "b2888a0e63527e8ea333b233919006295d3af5ced6ab56926d2ec2fa0991c9b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2888a0e63527e8ea333b233919006295d3af5ced6ab56926d2ec2fa0991c9b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2888a0e63527e8ea333b233919006295d3af5ced6ab56926d2ec2fa0991c9b6", kill_on_drop: false }`
[INFO] [stdout] b2888a0e63527e8ea333b233919006295d3af5ced6ab56926d2ec2fa0991c9b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f215f79151ef6bb6ee4c693e681fd0e280728d66be2c47bd8b4ceedd6786d4c6
[INFO] running `Command { std: "docker" "start" "-a" "f215f79151ef6bb6ee4c693e681fd0e280728d66be2c47bd8b4ceedd6786d4c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling strum v0.18.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking futures-sink v0.3.14
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking futures-channel v0.3.14
[INFO] [stderr]     Checking futures-io v0.3.14
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]    Compiling cairo-rs v0.9.1
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]     Checking tinystr v0.3.4
[INFO] [stderr]    Compiling gio v0.9.1
[INFO] [stderr]     Checking unic-ucd-bidi v0.9.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]    Compiling gdk-pixbuf v0.9.0
[INFO] [stderr]    Compiling pango v0.9.1
[INFO] [stderr]     Checking unic-langid-impl v0.9.0
[INFO] [stderr]    Compiling const_fn v0.4.7
[INFO] [stderr]     Checking unic-bidi v0.9.0
[INFO] [stderr]    Compiling atk v0.9.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling gdk v0.13.2
[INFO] [stderr]     Checking unic-langid v0.9.0
[INFO] [stderr]    Compiling gtk v0.9.2
[INFO] [stderr]    Compiling time v0.2.26
[INFO] [stderr]     Checking kurbo v0.7.1
[INFO] [stderr]     Checking xi-unicode v0.2.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking intl_pluralrules v7.0.1
[INFO] [stderr]     Checking type-map v0.4.0
[INFO] [stderr]     Checking fluent-langneg v0.13.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking keyboard-types v0.5.0
[INFO] [stderr]     Checking intl-memoizer v0.5.1
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking fluent-syntax v0.9.3
[INFO] [stderr]     Checking simple_logger v1.11.0
[INFO] [stderr]     Checking xi-unicode v0.3.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking piet v0.3.1
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling glib-macros v0.10.1
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]    Compiling druid-derive v0.4.0
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling system-deps v1.3.2
[INFO] [stderr]    Compiling glib-sys v0.10.1
[INFO] [stderr]    Compiling gobject-sys v0.10.0
[INFO] [stderr]    Compiling gio-sys v0.10.1
[INFO] [stderr]    Compiling cairo-sys-rs v0.10.0
[INFO] [stderr]    Compiling pango-sys v0.10.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.10.0
[INFO] [stderr]    Compiling gdk-sys v0.10.0
[INFO] [stderr]    Compiling atk-sys v0.10.0
[INFO] [stderr]    Compiling gtk-sys v0.10.0
[INFO] [stderr]     Checking futures-executor v0.3.14
[INFO] [stderr]     Checking glib v0.10.3
[INFO] [stderr]     Checking futures v0.3.14
[INFO] [stderr]     Checking rental v0.5.5
[INFO] [stderr]     Checking fluent-bundle v0.12.0
[INFO] [stderr]     Checking piet-cairo v0.3.0
[INFO] [stderr]     Checking piet-common v0.3.2
[INFO] [stderr]     Checking druid-shell v0.7.0
[INFO] [stderr]     Checking druid v0.7.0
[INFO] [stderr]  Documenting sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `sudoku`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type bin --crate-name sudoku src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=7e09bd89fded5f7f -L dependency=/opt/rustwide/target/debug/deps --extern druid=/opt/rustwide/target/debug/deps/libdruid-6c093a1e7ab8de26.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-e7445b4e8703c20b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-da035f0a1954db67.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "f215f79151ef6bb6ee4c693e681fd0e280728d66be2c47bd8b4ceedd6786d4c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f215f79151ef6bb6ee4c693e681fd0e280728d66be2c47bd8b4ceedd6786d4c6", kill_on_drop: false }`
[INFO] [stdout] f215f79151ef6bb6ee4c693e681fd0e280728d66be2c47bd8b4ceedd6786d4c6
[INFO] documenting EdSabino/sudoku_solution against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdSabino%2Fsudoku_solution" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EdSabino/sudoku_solution on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/EdSabino/sudoku_solution
[INFO] finished tweaking git repo https://github.com/EdSabino/sudoku_solution
[INFO] tweaked toml for git repo https://github.com/EdSabino/sudoku_solution written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/EdSabino/sudoku_solution 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" "+beta-2023-12-22" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85db1a56bb3a64da6928ba580b2c8da0a0b46a96683b9d51aaa9ac5035968b95
[INFO] running `Command { std: "docker" "start" "-a" "85db1a56bb3a64da6928ba580b2c8da0a0b46a96683b9d51aaa9ac5035968b95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85db1a56bb3a64da6928ba580b2c8da0a0b46a96683b9d51aaa9ac5035968b95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85db1a56bb3a64da6928ba580b2c8da0a0b46a96683b9d51aaa9ac5035968b95", kill_on_drop: false }`
[INFO] [stdout] 85db1a56bb3a64da6928ba580b2c8da0a0b46a96683b9d51aaa9ac5035968b95
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f0b4d2a5bf44bdb93ced43988b5616184ea0ac60a3940336215673281beb228
[INFO] running `Command { std: "docker" "start" "-a" "8f0b4d2a5bf44bdb93ced43988b5616184ea0ac60a3940336215673281beb228", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling strum v0.18.0
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking futures-sink v0.3.14
[INFO] [stderr]     Checking futures-io v0.3.14
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking futures-channel v0.3.14
[INFO] [stderr]     Checking futures-task v0.3.14
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling cairo-rs v0.9.1
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling gio v0.9.1
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking tinystr v0.3.4
[INFO] [stderr]    Compiling gdk-pixbuf v0.9.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking unic-ucd-bidi v0.9.0
[INFO] [stderr]    Compiling pango v0.9.1
[INFO] [stderr]     Checking unic-langid-impl v0.9.0
[INFO] [stderr]    Compiling atk v0.9.0
[INFO] [stderr]    Compiling gdk v0.13.2
[INFO] [stderr]    Compiling const_fn v0.4.7
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking unic-bidi v0.9.0
[INFO] [stderr]    Compiling gtk v0.9.2
[INFO] [stderr]     Checking unic-langid v0.9.0
[INFO] [stderr]    Compiling time v0.2.26
[INFO] [stderr]     Checking xi-unicode v0.2.1
[INFO] [stderr]     Checking kurbo v0.7.1
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking type-map v0.4.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking intl_pluralrules v7.0.1
[INFO] [stderr]     Checking fluent-langneg v0.13.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking keyboard-types v0.5.0
[INFO] [stderr]     Checking intl-memoizer v0.5.1
[INFO] [stderr]     Checking fluent-syntax v0.9.3
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking simple_logger v1.11.0
[INFO] [stderr]     Checking xi-unicode v0.3.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking piet v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling glib-macros v0.10.1
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]    Compiling druid-derive v0.4.0
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling system-deps v1.3.2
[INFO] [stderr]    Compiling glib-sys v0.10.1
[INFO] [stderr]    Compiling gobject-sys v0.10.0
[INFO] [stderr]    Compiling gio-sys v0.10.1
[INFO] [stderr]    Compiling cairo-sys-rs v0.10.0
[INFO] [stderr]    Compiling pango-sys v0.10.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.10.0
[INFO] [stderr]    Compiling gdk-sys v0.10.0
[INFO] [stderr]    Compiling atk-sys v0.10.0
[INFO] [stderr]    Compiling gtk-sys v0.10.0
[INFO] [stderr]     Checking futures-executor v0.3.14
[INFO] [stderr]     Checking glib v0.10.3
[INFO] [stderr]     Checking futures v0.3.14
[INFO] [stderr]     Checking rental v0.5.5
[INFO] [stderr]     Checking fluent-bundle v0.12.0
[INFO] [stderr]     Checking piet-cairo v0.3.0
[INFO] [stderr]     Checking piet-common v0.3.2
[INFO] [stderr]     Checking druid-shell v0.7.0
[INFO] [stderr]     Checking druid v0.7.0
[INFO] [stderr]  Documenting sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `sudoku`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2023-12-22-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type bin --crate-name sudoku src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=2449a3687a91efcd -L dependency=/opt/rustwide/target/debug/deps --extern druid=/opt/rustwide/target/debug/deps/libdruid-d6d079b1bb86f67e.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-cc91e7c9c894213a.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-068b2544b6895e99.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8f0b4d2a5bf44bdb93ced43988b5616184ea0ac60a3940336215673281beb228", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f0b4d2a5bf44bdb93ced43988b5616184ea0ac60a3940336215673281beb228", kill_on_drop: false }`
[INFO] [stdout] 8f0b4d2a5bf44bdb93ced43988b5616184ea0ac60a3940336215673281beb228
