[INFO] cloning repository https://github.com/paulgb/crossword-composer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/paulgb/crossword-composer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaulgb%2Fcrossword-composer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaulgb%2Fcrossword-composer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 912c5eec86f88fa9fe9cd8a26562e47b35855c5e
[INFO] checking paulgb/crossword-composer against master#75dbd5b8c3e3e3e7673caa890422e654d39b815e for pr-95985
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaulgb%2Fcrossword-composer" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/paulgb/crossword-composer on toolchain 75dbd5b8c3e3e3e7673caa890422e654d39b815e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+75dbd5b8c3e3e3e7673caa890422e654d39b815e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/paulgb/crossword-composer
[INFO] finished tweaking git repo https://github.com/paulgb/crossword-composer
[INFO] tweaked toml for git repo https://github.com/paulgb/crossword-composer written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/paulgb/crossword-composer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+75dbd5b8c3e3e3e7673caa890422e654d39b815e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:83125433e4fff17b1ac56874832f668d9df75ee638575aca552b68e127bedee9" "/opt/rustwide/cargo-home/bin/cargo" "+75dbd5b8c3e3e3e7673caa890422e654d39b815e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed92fcd14ab6143818f03d02408dbe7c702a0ee55c52f65ea4b0d5d26a00aede
[INFO] running `Command { std: "docker" "start" "-a" "ed92fcd14ab6143818f03d02408dbe7c702a0ee55c52f65ea4b0d5d26a00aede", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed92fcd14ab6143818f03d02408dbe7c702a0ee55c52f65ea4b0d5d26a00aede", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed92fcd14ab6143818f03d02408dbe7c702a0ee55c52f65ea4b0d5d26a00aede", kill_on_drop: false }`
[INFO] [stdout] ed92fcd14ab6143818f03d02408dbe7c702a0ee55c52f65ea4b0d5d26a00aede
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:83125433e4fff17b1ac56874832f668d9df75ee638575aca552b68e127bedee9" "/opt/rustwide/cargo-home/bin/cargo" "+75dbd5b8c3e3e3e7673caa890422e654d39b815e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e5e642eaac540de4c50bf49d48493d32a8a5009143f1bd9061d8613fd54a2e7
[INFO] running `Command { std: "docker" "start" "-a" "4e5e642eaac540de4c50bf49d48493d32a8a5009143f1bd9061d8613fd54a2e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.60
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bumpalo v3.2.1
[INFO] [stderr]    Compiling wasm-bindgen v0.2.60
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.60
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.60
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.60
[INFO] [stderr]     Checking js-sys v0.3.37
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking web-sys v0.3.37
[INFO] [stderr]     Checking crossword v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `word_length` is never read
[INFO] [stdout]  --> src/index.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Index {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 9 |     word_length: usize,              // Length of words that make up this index.
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Index` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `word_length` is never read
[INFO] [stdout]  --> src/index.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Index {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 9 |     word_length: usize,              // Length of words that make up this index.
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Index` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `word_length` is never read
[INFO] [stdout]  --> src/index.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Index {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 9 |     word_length: usize,              // Length of words that make up this index.
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Index` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `word_length` is never read
[INFO] [stdout]  --> src/index.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Index {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 9 |     word_length: usize,              // Length of words that make up this index.
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Index` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.30s
[INFO] running `Command { std: "docker" "inspect" "4e5e642eaac540de4c50bf49d48493d32a8a5009143f1bd9061d8613fd54a2e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e5e642eaac540de4c50bf49d48493d32a8a5009143f1bd9061d8613fd54a2e7", kill_on_drop: false }`
[INFO] [stdout] 4e5e642eaac540de4c50bf49d48493d32a8a5009143f1bd9061d8613fd54a2e7