[INFO] cloning repository https://github.com/tobiges/grid_coloring_problem_solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tobiges/grid_coloring_problem_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftobiges%2Fgrid_coloring_problem_solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftobiges%2Fgrid_coloring_problem_solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80ee0f1bf2fda843f7475cf84ec0d45d313107bc
[INFO] checking tobiges/grid_coloring_problem_solver against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftobiges%2Fgrid_coloring_problem_solver" "/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/tobiges/grid_coloring_problem_solver on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tobiges/grid_coloring_problem_solver
[INFO] finished tweaking git repo https://github.com/tobiges/grid_coloring_problem_solver
[INFO] tweaked toml for git repo https://github.com/tobiges/grid_coloring_problem_solver written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tobiges/grid_coloring_problem_solver 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded varisat-formula v0.2.2
[INFO] [stderr]   Downloaded varisat-internal-macros v0.2.2
[INFO] [stderr]   Downloaded vec_mut_scan v0.3.0
[INFO] [stderr]   Downloaded partial_ref v0.3.3
[INFO] [stderr]   Downloaded varisat-internal-proof v0.2.2
[INFO] [stderr]   Downloaded varisat-checker v0.2.2
[INFO] [stderr]   Downloaded partial_ref_derive v0.3.3
[INFO] [stderr]   Downloaded varisat-dimacs v0.2.2
[INFO] [stderr]   Downloaded varisat v0.2.2
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5f102abb30b3ad3ce9722c3e981dc4ca339cb4c778a4113a5409e39e86607af
[INFO] running `Command { std: "docker" "start" "-a" "c5f102abb30b3ad3ce9722c3e981dc4ca339cb4c778a4113a5409e39e86607af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5f102abb30b3ad3ce9722c3e981dc4ca339cb4c778a4113a5409e39e86607af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5f102abb30b3ad3ce9722c3e981dc4ca339cb4c778a4113a5409e39e86607af", kill_on_drop: false }`
[INFO] [stdout] c5f102abb30b3ad3ce9722c3e981dc4ca339cb4c778a4113a5409e39e86607af
[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=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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26852dd21e476de12403321bdd45b0eed1204ec5d0452333cb99b2dd5467cae7
[INFO] running `Command { std: "docker" "start" "-a" "26852dd21e476de12403321bdd45b0eed1204ec5d0452333cb99b2dd5467cae7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling anyhow v1.0.52
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking varisat-formula v0.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking leb128 v0.2.5
[INFO] [stderr]     Checking vec_mut_scan v0.3.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking varisat-internal-proof v0.2.2
[INFO] [stderr]    Compiling varisat v0.2.2
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]     Checking ordered-float v2.10.0
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling partial_ref_derive v0.3.3
[INFO] [stderr]    Compiling varisat-internal-macros v0.2.2
[INFO] [stderr]     Checking partial_ref v0.3.3
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking varisat-dimacs v0.2.2
[INFO] [stderr]     Checking varisat-checker v0.2.2
[INFO] [stderr]     Checking grid_coloring_problem_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [optimized + debuginfo] target(s) in 15.24s
[INFO] running `Command { std: "docker" "inspect" "26852dd21e476de12403321bdd45b0eed1204ec5d0452333cb99b2dd5467cae7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26852dd21e476de12403321bdd45b0eed1204ec5d0452333cb99b2dd5467cae7", kill_on_drop: false }`
[INFO] [stdout] 26852dd21e476de12403321bdd45b0eed1204ec5d0452333cb99b2dd5467cae7