[INFO] fetching crate scanlan_sudoku 0.1.0...
[INFO] testing scanlan_sudoku-0.1.0 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] extracting crate scanlan_sudoku 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate scanlan_sudoku 0.1.0
[INFO] finished tweaking crates.io crate scanlan_sudoku 0.1.0
[INFO] tweaked toml for crates.io crate scanlan_sudoku 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate scanlan_sudoku 0.1.0 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate scanlan_sudoku 0.1.0 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" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a16337359b375c43a12ec07e4561fec91ac76d3c78a751734aa2e48c985ec43e
[INFO] running `Command { std: "docker" "start" "-a" "a16337359b375c43a12ec07e4561fec91ac76d3c78a751734aa2e48c985ec43e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a16337359b375c43a12ec07e4561fec91ac76d3c78a751734aa2e48c985ec43e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a16337359b375c43a12ec07e4561fec91ac76d3c78a751734aa2e48c985ec43e", kill_on_drop: false }`
[INFO] [stdout] a16337359b375c43a12ec07e4561fec91ac76d3c78a751734aa2e48c985ec43e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56c27456e29e03cd1e11ebcfb6c529f57ba1c9a8ac35cdfe03938f36c8ba9c8c
[INFO] running `Command { std: "docker" "start" "-a" "56c27456e29e03cd1e11ebcfb6c529f57ba1c9a8ac35cdfe03938f36c8ba9c8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling regex-syntax v0.7.1
[INFO] [stderr]    Compiling aho-corasick v1.0.1
[INFO] [stderr]    Compiling getrandom v0.2.9
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex v1.8.1
[INFO] [stderr]    Compiling scanlan_sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `slice_flatten` has been stable since 1.80.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_flatten)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `[[Coord; 9]; 9]` is not an iterator
[INFO] [stdout]   --> src/logic/generator.rs:23:25
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let coords = coords.flatten();
[INFO] [stdout]    |                         ^^^^^^^ `[[Coord; 9]; 9]` is not an iterator
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `[[Coord; 9]; 9]: Iterator`
[INFO] [stdout]            which is required by `&mut [[Coord; 9]; 9]: Iterator`
[INFO] [stdout]            `[[Coord; 9]]: Iterator`
[INFO] [stdout]            which is required by `&mut [[Coord; 9]]: Iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `scanlan_sudoku` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "56c27456e29e03cd1e11ebcfb6c529f57ba1c9a8ac35cdfe03938f36c8ba9c8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56c27456e29e03cd1e11ebcfb6c529f57ba1c9a8ac35cdfe03938f36c8ba9c8c", kill_on_drop: false }`
[INFO] [stdout] 56c27456e29e03cd1e11ebcfb6c529f57ba1c9a8ac35cdfe03938f36c8ba9c8c
