[INFO] cloning repository https://github.com/hallettj/sat-solver-exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hallettj/sat-solver-exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhallettj%2Fsat-solver-exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhallettj%2Fsat-solver-exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 79e8b29506f5a0352c3d422d86ccd13fae13948a
[INFO] checking hallettj/sat-solver-exercise against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhallettj%2Fsat-solver-exercise" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hallettj/sat-solver-exercise 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/hallettj/sat-solver-exercise
[INFO] finished tweaking git repo https://github.com/hallettj/sat-solver-exercise
[INFO] tweaked toml for git repo https://github.com/hallettj/sat-solver-exercise written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hallettj/sat-solver-exercise 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 8c5d1940a7c9d2951debb795e38c522f55641bec6cc53aa0920f647f4475916b
[INFO] running `Command { std: "docker" "start" "-a" "8c5d1940a7c9d2951debb795e38c522f55641bec6cc53aa0920f647f4475916b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c5d1940a7c9d2951debb795e38c522f55641bec6cc53aa0920f647f4475916b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c5d1940a7c9d2951debb795e38c522f55641bec6cc53aa0920f647f4475916b", kill_on_drop: false }`
[INFO] [stdout] 8c5d1940a7c9d2951debb795e38c522f55641bec6cc53aa0920f647f4475916b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] d995c005d24df887bb8934b7fc443a4353c1e8b7688cc44e89d70365ca4d3c32
[INFO] running `Command { std: "docker" "start" "-a" "d995c005d24df887bb8934b7fc443a4353c1e8b7688cc44e89d70365ca4d3c32", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking varisat-formula v0.2.1
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking hashbrown v0.3.1
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]     Checking vec_mut_scan v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling partial_ref_derive v0.3.1
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling varisat-internal-macros v0.2.1
[INFO] [stderr]     Checking partial_ref v0.3.1
[INFO] [stderr]     Checking failure v0.1.8
[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]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Puzzle` is imported redundantly
[INFO] [stdout]    --> src/solver.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     use super::*;
[INFO] [stdout]     |         -------- the item `Puzzle` is already imported here
[INFO] [stdout] 128 |     use crate::puzzle::Puzzle;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.08s
[INFO] running `Command { std: "docker" "inspect" "d995c005d24df887bb8934b7fc443a4353c1e8b7688cc44e89d70365ca4d3c32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d995c005d24df887bb8934b7fc443a4353c1e8b7688cc44e89d70365ca4d3c32", kill_on_drop: false }`
[INFO] [stdout] d995c005d24df887bb8934b7fc443a4353c1e8b7688cc44e89d70365ca4d3c32
[INFO] checking hallettj/sat-solver-exercise against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhallettj%2Fsat-solver-exercise" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hallettj/sat-solver-exercise on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hallettj/sat-solver-exercise
[INFO] finished tweaking git repo https://github.com/hallettj/sat-solver-exercise
[INFO] tweaked toml for git repo https://github.com/hallettj/sat-solver-exercise written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hallettj/sat-solver-exercise 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f88b21dd97b6c7758d2948f9862f89f2fec62411c5ca777dbfdbd3d96aaace76
[INFO] running `Command { std: "docker" "start" "-a" "f88b21dd97b6c7758d2948f9862f89f2fec62411c5ca777dbfdbd3d96aaace76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f88b21dd97b6c7758d2948f9862f89f2fec62411c5ca777dbfdbd3d96aaace76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f88b21dd97b6c7758d2948f9862f89f2fec62411c5ca777dbfdbd3d96aaace76", kill_on_drop: false }`
[INFO] [stdout] f88b21dd97b6c7758d2948f9862f89f2fec62411c5ca777dbfdbd3d96aaace76
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29f61a20ef38050c5da07b7bce42a5d7136a464d2c896d296c9255714f88b6d1
[INFO] running `Command { std: "docker" "start" "-a" "29f61a20ef38050c5da07b7bce42a5d7136a464d2c896d296c9255714f88b6d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking varisat-formula v0.2.1
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking hashbrown v0.3.1
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]     Checking vec_mut_scan v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling partial_ref_derive v0.3.1
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling varisat-internal-macros v0.2.1
[INFO] [stderr]     Checking partial_ref v0.3.1
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling varisat v0.2.1
[INFO] [stderr]     Checking varisat-internal-proof v0.2.1
[INFO] [stderr]     Checking varisat-dimacs v0.2.1
[INFO] [stderr]     Checking varisat-checker v0.2.1
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Puzzle` is imported redundantly
[INFO] [stdout]    --> src/solver.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     use super::*;
[INFO] [stdout]     |         -------- the item `Puzzle` is already imported here
[INFO] [stdout] 128 |     use crate::puzzle::Puzzle;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.32s
[INFO] running `Command { std: "docker" "inspect" "29f61a20ef38050c5da07b7bce42a5d7136a464d2c896d296c9255714f88b6d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29f61a20ef38050c5da07b7bce42a5d7136a464d2c896d296c9255714f88b6d1", kill_on_drop: false }`
[INFO] [stdout] 29f61a20ef38050c5da07b7bce42a5d7136a464d2c896d296c9255714f88b6d1