[INFO] cloning repository https://github.com/7omb/sudoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/7omb/sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F7omb%2Fsudoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F7omb%2Fsudoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 048ee87e6b121ad488d265cb6255154941bb4cfc
[INFO] documenting 7omb/sudoku against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F7omb%2Fsudoku" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/7omb/sudoku on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/7omb/sudoku
[INFO] finished tweaking git repo https://github.com/7omb/sudoku
[INFO] tweaked toml for git repo https://github.com/7omb/sudoku written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/7omb/sudoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num_cpus v1.10.1
[INFO] [stderr]   Downloaded crossbeam-deque v0.7.1
[INFO] [stderr]   Downloaded crossbeam-epoch v0.7.2
[INFO] [stderr]   Downloaded getrandom v0.1.12
[INFO] [stderr]   Downloaded libc v0.2.62
[INFO] [stderr]   Downloaded bstr v0.2.8
[INFO] [stderr]   Downloaded wasi v0.7.0
[INFO] [stderr]   Downloaded varisat-dimacs v0.2.1
[INFO] [stderr]   Downloaded leb128 v0.2.4
[INFO] [stderr]   Downloaded crossbeam-queue v0.1.2
[INFO] [stderr]   Downloaded partial_ref_derive v0.3.1
[INFO] [stderr]   Downloaded bitflags v1.2.0
[INFO] [stderr]   Downloaded vec_mut_scan v0.1.0
[INFO] [stderr]   Downloaded partial_ref v0.3.1
[INFO] [stderr]   Downloaded varisat-formula v0.2.1
[INFO] [stderr]   Downloaded criterion v0.3.0
[INFO] [stderr]   Downloaded varisat-internal-proof v0.2.1
[INFO] [stderr]   Downloaded varisat v0.2.1
[INFO] [stderr]   Downloaded cc v1.0.45
[INFO] [stderr]   Downloaded autocfg v0.1.6
[INFO] [stderr]   Downloaded backtrace v0.3.38
[INFO] [stderr]   Downloaded rayon-core v1.6.0
[INFO] [stderr]   Downloaded itertools v0.8.0
[INFO] [stderr]   Downloaded csv v1.1.1
[INFO] [stderr]   Downloaded arrayvec v0.4.11
[INFO] [stderr]   Downloaded memoffset v0.5.1
[INFO] [stderr]   Downloaded serde_derive v1.0.101
[INFO] [stderr]   Downloaded tinytemplate v1.0.2
[INFO] [stderr]   Downloaded backtrace-sys v0.1.31
[INFO] [stderr]   Downloaded cast v0.2.2
[INFO] [stderr]   Downloaded rand_xoshiro v0.3.1
[INFO] [stderr]   Downloaded smallvec v0.6.10
[INFO] [stderr]   Downloaded varisat-internal-macros v0.2.1
[INFO] [stderr]   Downloaded csv-core v0.1.6
[INFO] [stderr]   Downloaded synstructure v0.10.2
[INFO] [stderr]   Downloaded rayon v1.2.0
[INFO] [stderr]   Downloaded regex-automata v0.1.8
[INFO] [stderr]   Downloaded hashbrown v0.3.1
[INFO] [stderr]   Downloaded varisat-checker v0.2.1
[INFO] [stderr]   Downloaded serde_json v1.0.40
[INFO] [stderr]   Downloaded serde v1.0.101
[INFO] [stderr]   Downloaded proc-macro2 v1.0.4
[INFO] [stderr]   Downloaded ryu v1.0.0
[INFO] [stderr]   Downloaded rand_os v0.2.2
[INFO] [stderr]   Downloaded criterion-plot v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddf60208df0015d698c704b3f958f13043ddce4a8e24aa3c2c822eb749d809c8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ddf60208df0015d698c704b3f958f13043ddce4a8e24aa3c2c822eb749d809c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddf60208df0015d698c704b3f958f13043ddce4a8e24aa3c2c822eb749d809c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddf60208df0015d698c704b3f958f13043ddce4a8e24aa3c2c822eb749d809c8", kill_on_drop: false }`
[INFO] [stdout] ddf60208df0015d698c704b3f958f13043ddce4a8e24aa3c2c822eb749d809c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f54d53c250654d8f36b030c594f60a82ca81566e1d47732aa921feb4641d864
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3f54d53c250654d8f36b030c594f60a82ca81566e1d47732aa921feb4641d864", kill_on_drop: false }`
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.4
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking varisat-formula v0.2.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]     Checking vec_mut_scan v0.1.0
[INFO] [stderr]     Checking backtrace-sys v0.1.31
[INFO] [stderr]    Compiling backtrace v0.3.38
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling partial_ref_derive v0.3.1
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking partial_ref v0.3.1
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking varisat-dimacs v0.2.1
[INFO] [stderr]     Checking varisat-internal-proof v0.2.1
[INFO] [stderr]    Compiling varisat v0.2.1
[INFO] [stderr]     Checking varisat-checker v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling varisat-internal-macros v0.2.1
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.99s
[INFO] running `Command { std: "docker" "inspect" "3f54d53c250654d8f36b030c594f60a82ca81566e1d47732aa921feb4641d864", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f54d53c250654d8f36b030c594f60a82ca81566e1d47732aa921feb4641d864", kill_on_drop: false }`
[INFO] [stdout] 3f54d53c250654d8f36b030c594f60a82ca81566e1d47732aa921feb4641d864