[INFO] fetching crate sudoku-variants 0.2.1...
[INFO] checking sudoku-variants-0.2.1 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate sudoku-variants 0.2.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate sudoku-variants 0.2.1
[INFO] finished tweaking crates.io crate sudoku-variants 0.2.1
[INFO] tweaked toml for crates.io crate sudoku-variants 0.2.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sudoku-variants 0.2.1 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 80 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.6.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.1)
[INFO] [stderr]       Adding rand_chacha v0.3.1 (available: v0.9.0)
[INFO] [stderr]       Adding toml v0.5.11 (available: v0.8.23)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9fed94da345ce44c94826cd893a4b86eb65b32354260b4710e66ea1d0e0d83c
[INFO] running `Command { std: "docker" "start" "-a" "b9fed94da345ce44c94826cd893a4b86eb65b32354260b4710e66ea1d0e0d83c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9fed94da345ce44c94826cd893a4b86eb65b32354260b4710e66ea1d0e0d83c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9fed94da345ce44c94826cd893a4b86eb65b32354260b4710e66ea1d0e0d83c", kill_on_drop: false }`
[INFO] [stdout] b9fed94da345ce44c94826cd893a4b86eb65b32354260b4710e66ea1d0e0d83c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7220c19914fd66b008249db9a42a1ffffc13d6e5d3300e5e74ee0eab319f528a
[INFO] running `Command { std: "docker" "start" "-a" "7220c19914fd66b008249db9a42a1ffffc13d6e5d3300e5e74ee0eab319f528a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]     Checking memchr v2.7.5
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking plotters-backend v0.3.7
[INFO] [stderr]     Checking unicode-width v0.1.14
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking half v1.8.3
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking oorandom v11.1.5
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking plotters-svg v0.3.7
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking csv-core v0.1.12
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam-deque v0.8.6
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking sudoku-variants v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/util.rs:108:31
[INFO] [stdout]     |
[INFO] [stdout] 108 | const USIZE_BIT_SIZE: usize = mem::size_of::<usize>() * 8;
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:8:9
[INFO] [stdout]     |
[INFO] [stdout] 8   | #![warn(unused_qualifications)]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 108 - const USIZE_BIT_SIZE: usize = mem::size_of::<usize>() * 8;
[INFO] [stdout] 108 + const USIZE_BIT_SIZE: usize = size_of::<usize>() * 8;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking csv v1.3.1
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/util.rs:108:31
[INFO] [stdout]     |
[INFO] [stdout] 108 | const USIZE_BIT_SIZE: usize = mem::size_of::<usize>() * 8;
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:8:9
[INFO] [stdout]     |
[INFO] [stdout] 8   | #![warn(unused_qualifications)]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 108 - const USIZE_BIT_SIZE: usize = mem::size_of::<usize>() * 8;
[INFO] [stdout] 108 + const USIZE_BIT_SIZE: usize = size_of::<usize>() * 8;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.94s
[INFO] running `Command { std: "docker" "inspect" "7220c19914fd66b008249db9a42a1ffffc13d6e5d3300e5e74ee0eab319f528a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7220c19914fd66b008249db9a42a1ffffc13d6e5d3300e5e74ee0eab319f528a", kill_on_drop: false }`
[INFO] [stdout] 7220c19914fd66b008249db9a42a1ffffc13d6e5d3300e5e74ee0eab319f528a