[INFO] cloning repository https://github.com/sinnerschrader/rust-exercism-cubicle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sinnerschrader/rust-exercism-cubicle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinnerschrader%2Frust-exercism-cubicle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinnerschrader%2Frust-exercism-cubicle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7206a04271a81f758533b7431ae38a0466340ca7
[INFO] checking sinnerschrader/rust-exercism-cubicle against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinnerschrader%2Frust-exercism-cubicle" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sinnerschrader/rust-exercism-cubicle
[INFO] finished tweaking git repo https://github.com/sinnerschrader/rust-exercism-cubicle
[INFO] tweaked toml for git repo https://github.com/sinnerschrader/rust-exercism-cubicle written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sinnerschrader/rust-exercism-cubicle on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sinnerschrader/rust-exercism-cubicle 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e73115edc6d4b3d4e6eda9b3d7f91cec231a4a01dca560d87768be1f22553db8
[INFO] running `Command { std: "docker" "start" "-a" "e73115edc6d4b3d4e6eda9b3d7f91cec231a4a01dca560d87768be1f22553db8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e73115edc6d4b3d4e6eda9b3d7f91cec231a4a01dca560d87768be1f22553db8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e73115edc6d4b3d4e6eda9b3d7f91cec231a4a01dca560d87768be1f22553db8", kill_on_drop: false }`
[INFO] [stdout] e73115edc6d4b3d4e6eda9b3d7f91cec231a4a01dca560d87768be1f22553db8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bc250de84e7ce48dacbb36f9725b22746a3bca8e2613ef424d35491faefa800
[INFO] running `Command { std: "docker" "start" "-a" "5bc250de84e7ce48dacbb36f9725b22746a3bca8e2613ef424d35491faefa800", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling cc v1.0.32
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking rustc-demangle v0.1.13
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]     Checking maplit v1.0.1
[INFO] [stderr]     Checking parallel-letter-frequency v0.0.0 (/opt/rustwide/workdir/exercises/parallel-letter-frequency)
[INFO] [stderr]     Checking bob v1.4.0 (/opt/rustwide/workdir/exercises/bob)
[INFO] [stderr]     Checking dot-dsl v0.1.0 (/opt/rustwide/workdir/exercises/dot-dsl)
[INFO] [stderr]     Checking binary-search v1.3.0 (/opt/rustwide/workdir/exercises/binary-search)
[INFO] [stderr]     Checking scale_generator v2.0.0 (/opt/rustwide/workdir/exercises/scale-generator)
[INFO] [stderr]     Checking series v0.1.0 (/opt/rustwide/workdir/exercises/series)
[INFO] [stderr]     Checking palindrome-products v1.1.0 (/opt/rustwide/workdir/exercises/palindrome-products)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]   --> exercises/dot-dsl/src/lib.rs:74:73
[INFO] [stdout]    |
[INFO] [stdout] 74 |                     self.attrs.get(&String::from(key)).map(|value| value.clone())
[INFO] [stdout]    |                                                                         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rotational-cipher v1.0.0 (/opt/rustwide/workdir/exercises/rotational-cipher)
[INFO] [stderr]     Checking nucleotide-count v1.3.0 (/opt/rustwide/workdir/exercises/nucleotide-count)
[INFO] [stderr]     Checking book_store v1.3.0 (/opt/rustwide/workdir/exercises/book-store)
[INFO] [stderr]     Checking forth v1.7.0 (/opt/rustwide/workdir/exercises/forth)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> exercises/nucleotide-count/src/lib.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let dna_strand = String::from_str(dna).unwrap();
[INFO] [stdout]   |                      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> exercises/nucleotide-count/src/lib.rs:23:22
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let dna_strand = String::from_str(dna).unwrap();
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking spiral-matrix v1.1.0 (/opt/rustwide/workdir/exercises/spiral-matrix)
[INFO] [stderr]     Checking luhn-trait v0.0.0 (/opt/rustwide/workdir/exercises/luhn-trait)
[INFO] [stderr] error: could not compile `nucleotide-count` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5bc250de84e7ce48dacbb36f9725b22746a3bca8e2613ef424d35491faefa800", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bc250de84e7ce48dacbb36f9725b22746a3bca8e2613ef424d35491faefa800", kill_on_drop: false }`
[INFO] [stdout] 5bc250de84e7ce48dacbb36f9725b22746a3bca8e2613ef424d35491faefa800
