[INFO] cloning repository https://github.com/dralley/sudoku-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dralley/sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdralley%2Fsudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdralley%2Fsudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a89c12817a7b1a8c14875ba133f55fca3d7f536d
[INFO] checking dralley/sudoku-solver against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdralley%2Fsudoku-solver" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dralley/sudoku-solver on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dralley/sudoku-solver
[INFO] finished tweaking git repo https://github.com/dralley/sudoku-solver
[INFO] tweaked toml for git repo https://github.com/dralley/sudoku-solver written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/dralley/sudoku-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "fetch" "--locked" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand v0.5.6
[INFO] [stderr]   Downloaded ansi_term v0.11.0
[INFO] [stderr]   Downloaded strsim v0.8.0
[INFO] [stderr]   Downloaded num-traits v0.2.8
[INFO] [stderr]   Downloaded rand_core v0.4.0
[INFO] [stderr]   Downloaded cc v1.0.38
[INFO] [stderr]   Downloaded log v0.4.7
[INFO] [stderr]   Downloaded ucd-util v0.1.5
[INFO] [stderr]   Downloaded regex v1.2.0
[INFO] [stderr]   Downloaded itoa v0.4.4
[INFO] [stderr]   Downloaded lazy_static v1.3.0
[INFO] [stderr]   Downloaded hashbrown v0.3.1
[INFO] [stderr]   Downloaded textwrap v0.11.0
[INFO] [stderr]   Downloaded thread_local v0.3.6
[INFO] [stderr]   Downloaded leb128 v0.2.4
[INFO] [stderr]   Downloaded ordered-float v1.0.2
[INFO] [stderr]   Downloaded backtrace-sys v0.1.31
[INFO] [stderr]   Downloaded partial_ref_derive v0.3.1
[INFO] [stderr]   Downloaded vec_map v0.8.1
[INFO] [stderr]   Downloaded varisat-formula v0.2.1
[INFO] [stderr]   Downloaded vec_mut_scan v0.1.0
[INFO] [stderr]   Downloaded synstructure v0.10.2
[INFO] [stderr]   Downloaded smallvec v0.6.10
[INFO] [stderr]   Downloaded backtrace v0.3.34
[INFO] [stderr]   Downloaded rustc-demangle v0.1.15
[INFO] [stderr]   Downloaded failure v0.1.5
[INFO] [stderr]   Downloaded serde v1.0.98
[INFO] [stderr]   Downloaded clap v2.33.0
[INFO] [stderr]   Downloaded memchr v2.2.1
[INFO] [stderr]   Downloaded atty v0.2.13
[INFO] [stderr]   Downloaded utf8-ranges v1.0.3
[INFO] [stderr]   Downloaded aho-corasick v0.7.4
[INFO] [stderr]   Downloaded cfg-if v0.1.9
[INFO] [stderr]   Downloaded regex-syntax v0.6.10
[INFO] [stderr]   Downloaded bitflags v1.1.0
[INFO] [stderr]   Downloaded unicode-width v0.1.5
[INFO] [stderr]   Downloaded serde_derive v1.0.98
[INFO] [stderr]   Downloaded varisat v0.2.1
[INFO] [stderr]   Downloaded varisat-internal-proof v0.2.1
[INFO] [stderr]   Downloaded varisat-dimacs v0.2.1
[INFO] [stderr]   Downloaded failure_derive v0.1.5
[INFO] [stderr]   Downloaded varisat-internal-macros v0.2.1
[INFO] [stderr]   Downloaded varisat-checker v0.2.1
[INFO] [stderr]   Downloaded partial_ref v0.3.1
[INFO] [stderr]   Downloaded autocfg v0.1.5
[INFO] [stderr]   Downloaded sudoku v0.7.0
[INFO] [stderr]   Downloaded winapi v0.3.7
[INFO] [stderr]   Downloaded syn v0.15.43
[INFO] [stderr]   Downloaded libc v0.2.60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 224f3885b6e4a8884bcfcdbd6f02155a9b6478e772340cffc657cae0381b17b3
[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" "224f3885b6e4a8884bcfcdbd6f02155a9b6478e772340cffc657cae0381b17b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "224f3885b6e4a8884bcfcdbd6f02155a9b6478e772340cffc657cae0381b17b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "224f3885b6e4a8884bcfcdbd6f02155a9b6478e772340cffc657cae0381b17b3", kill_on_drop: false }`
[INFO] [stdout] 224f3885b6e4a8884bcfcdbd6f02155a9b6478e772340cffc657cae0381b17b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11f683a33cabd50d8875ff147c9f51a402cc8f5fd8de264f8cd2593c9dd9e89d
[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" "11f683a33cabd50d8875ff147c9f51a402cc8f5fd8de264f8cd2593c9dd9e89d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling syn v0.15.43
[INFO] [stderr]    Compiling cc v1.0.38
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking rustc-demangle v0.1.15
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling ucd-util v0.1.5
[INFO] [stderr]     Checking varisat-formula v0.2.1
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling utf8-ranges v1.0.3
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking hashbrown v0.3.1
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_mut_scan v0.1.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling regex-syntax v0.6.10
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]    Compiling backtrace v0.3.34
[INFO] [stderr]     Checking sudoku v0.7.0
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling partial_ref_derive v0.3.1
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking partial_ref v0.3.1
[INFO] [stderr]     Checking varisat-internal-proof v0.2.1
[INFO] [stderr]     Checking varisat-dimacs v0.2.1
[INFO] [stderr]    Compiling varisat-internal-macros v0.2.1
[INFO] [stderr]    Compiling varisat v0.2.1
[INFO] [stderr]     Checking varisat-checker v0.2.1
[INFO] [stderr]     Checking sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 03s
[INFO] running `Command { std: "docker" "inspect" "11f683a33cabd50d8875ff147c9f51a402cc8f5fd8de264f8cd2593c9dd9e89d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11f683a33cabd50d8875ff147c9f51a402cc8f5fd8de264f8cd2593c9dd9e89d", kill_on_drop: false }`
[INFO] [stdout] 11f683a33cabd50d8875ff147c9f51a402cc8f5fd8de264f8cd2593c9dd9e89d