[INFO] cloning repository https://github.com/apexys/Crossword
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/apexys/Crossword" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapexys%2FCrossword", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapexys%2FCrossword'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c3127aa6b04d41d9c56b944246634742965fb583
[INFO] testing apexys/Crossword against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapexys%2FCrossword" "/workspace/builds/worker-101/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-101/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/apexys/Crossword on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/apexys/Crossword
[INFO] finished tweaking git repo https://github.com/apexys/Crossword
[INFO] tweaked toml for git repo https://github.com/apexys/Crossword written to /workspace/builds/worker-101/source/Cargo.toml
[INFO] crate git repo https://github.com/apexys/Crossword already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bab25a848ca87f548234ffea8dde0cf74fb77e8f4e9803b44519065e026ed9e5
[INFO] running `Command { std: "docker" "start" "-a" "bab25a848ca87f548234ffea8dde0cf74fb77e8f4e9803b44519065e026ed9e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bab25a848ca87f548234ffea8dde0cf74fb77e8f4e9803b44519065e026ed9e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bab25a848ca87f548234ffea8dde0cf74fb77e8f4e9803b44519065e026ed9e5", kill_on_drop: false }`
[INFO] [stdout] bab25a848ca87f548234ffea8dde0cf74fb77e8f4e9803b44519065e026ed9e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-101/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b00daa2d36696ffcccc087aaa40e637095ddc3c662505c31d6d67fc45a957b75
[INFO] running `Command { std: "docker" "start" "-a" "b00daa2d36696ffcccc087aaa40e637095ddc3c662505c31d6d67fc45a957b75", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling smallvec v1.4.2
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling crossword v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `Map` in the current scope
[INFO] [stdout]    --> src/main.rs:153:84
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 let words = uppercase.iter().map(|w| w.iter().collect::<String>()).fold_first(|prev, next| prev + ", " + &next).unwrap();
[INFO] [stdout]     |                                                                                    ^^^^^^^^^^ method not found in `Map<std::slice::Iter<'_, Vec<char>>, [closure@src/main.rs:153:50: 153:82]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `crossword` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b00daa2d36696ffcccc087aaa40e637095ddc3c662505c31d6d67fc45a957b75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b00daa2d36696ffcccc087aaa40e637095ddc3c662505c31d6d67fc45a957b75", kill_on_drop: false }`
[INFO] [stdout] b00daa2d36696ffcccc087aaa40e637095ddc3c662505c31d6d67fc45a957b75