[INFO] fetching crate dlx 0.1.0...
[INFO] checking dlx-0.1.0 against try#353a0a223066e9f46a1d935f2271a26c3c5002bb for pr-75180
[INFO] extracting crate dlx 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate dlx 0.1.0 on toolchain 353a0a223066e9f46a1d935f2271a26c3c5002bb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dlx 0.1.0
[INFO] finished tweaking crates.io crate dlx 0.1.0
[INFO] tweaked toml for crates.io crate dlx 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0945acb1fa35e3ae12d17cd55233de38e60a96e219fb7f8155922d7759924963
[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" "0945acb1fa35e3ae12d17cd55233de38e60a96e219fb7f8155922d7759924963", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0945acb1fa35e3ae12d17cd55233de38e60a96e219fb7f8155922d7759924963", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0945acb1fa35e3ae12d17cd55233de38e60a96e219fb7f8155922d7759924963", kill_on_drop: false }`
[INFO] [stdout] 0945acb1fa35e3ae12d17cd55233de38e60a96e219fb7f8155922d7759924963
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5f2101e84c8e5d920e49dd98380a7a44ef68b3e512105171927bad709f3af064
[INFO] running `Command { std: "docker" "start" "-a" "5f2101e84c8e5d920e49dd98380a7a44ef68b3e512105171927bad709f3af064", kill_on_drop: false }`
[INFO] [stderr]     Checking dlx v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:178:59
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn solve(&mut self, partial: Vec<Row>, sols: &mut Solutions) {
[INFO] [stdout]     |                                                           ^^^^^^^^^ help: use `dyn`: `dyn Solutions`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:197:60
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn solveception(&mut self, partial: &[Row], sols: &mut Solutions) {
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn Solutions`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:178:59
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn solve(&mut self, partial: Vec<Row>, sols: &mut Solutions) {
[INFO] [stdout]     |                                                           ^^^^^^^^^ help: use `dyn`: `dyn Solutions`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:197:60
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn solveception(&mut self, partial: &[Row], sols: &mut Solutions) {
[INFO] [stdout]     |                                                            ^^^^^^^^^ help: use `dyn`: `dyn Solutions`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> examples/sudoku.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 | /         /// Convert the rows from the exact cover matrix into a
[INFO] [stdout] 92 | |         /// standard sudoku grid.
[INFO] [stdout]    | |_________________________________^
[INFO] [stdout] 93 |           let mut grid = vec![b'0'; SIZE_SQ];
[INFO] [stdout]    |           ----------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "5f2101e84c8e5d920e49dd98380a7a44ef68b3e512105171927bad709f3af064", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f2101e84c8e5d920e49dd98380a7a44ef68b3e512105171927bad709f3af064", kill_on_drop: false }`
[INFO] [stdout] 5f2101e84c8e5d920e49dd98380a7a44ef68b3e512105171927bad709f3af064