[INFO] cloning repository https://github.com/ToF-/rust_word_ladder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ToF-/rust_word_ladder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToF-%2Frust_word_ladder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToF-%2Frust_word_ladder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 76fac564a7b0a6d3cd318adb2782cf7837df5771
[INFO] testing ToF-/rust_word_ladder against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FToF-%2Frust_word_ladder" "/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/ToF-/rust_word_ladder on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ToF-/rust_word_ladder
[INFO] finished tweaking git repo https://github.com/ToF-/rust_word_ladder
[INFO] tweaked toml for git repo https://github.com/ToF-/rust_word_ladder written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ToF-/rust_word_ladder already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cff03907749c0843d52673c12a467a3302e9519954298d7e71f046c4a09bcc2
[INFO] running `Command { std: "docker" "start" "-a" "9cff03907749c0843d52673c12a467a3302e9519954298d7e71f046c4a09bcc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cff03907749c0843d52673c12a467a3302e9519954298d7e71f046c4a09bcc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cff03907749c0843d52673c12a467a3302e9519954298d7e71f046c4a09bcc2", kill_on_drop: false }`
[INFO] [stdout] 9cff03907749c0843d52673c12a467a3302e9519954298d7e71f046c4a09bcc2
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 265edc971f5e4e8c68e09ab112d56ca6aad80f376811c22008650066faa788e4
[INFO] running `Command { std: "docker" "start" "-a" "265edc971f5e4e8c68e09ab112d56ca6aad80f376811c22008650066faa788e4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_word_ladder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `structopt`
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate structopt;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `StructOpt` in this scope
[INFO] [stdout]   --> src/main.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(Debug, StructOpt)]
[INFO] [stdout]    |                 ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `structopt` in this scope
[INFO] [stdout]   --> src/main.rs:14:3
[INFO] [stdout]    |
[INFO] [stdout] 14 | #[structopt(name = "word_ladder", about = "Finding ladders between words.")]
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `structopt` is imported here, but it is an unresolved item, not an attribute
[INFO] [stdout]   --> src/main.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | extern crate structopt;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `structopt` in this scope
[INFO] [stdout]   --> src/main.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 |     #[structopt(parse(from_os_str))]
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `structopt` is imported here, but it is an unresolved item, not an attribute
[INFO] [stdout]   --> src/main.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | extern crate structopt;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_args` found for struct `Opt` in the current scope
[INFO] [stdout]   --> src/main.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Opt {
[INFO] [stdout]    | ---------- function or associated item `from_args` not found for this
[INFO] [stdout] ...
[INFO] [stdout] 26 |     let opt = Opt::from_args();
[INFO] [stdout]    |                    ^^^^^^^^^ function or associated item not found in `Opt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_word_ladder` due to 6 previous errors
[INFO] [stdout] Some errors have detailed explanations: E0463, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "265edc971f5e4e8c68e09ab112d56ca6aad80f376811c22008650066faa788e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "265edc971f5e4e8c68e09ab112d56ca6aad80f376811c22008650066faa788e4", kill_on_drop: false }`
[INFO] [stdout] 265edc971f5e4e8c68e09ab112d56ca6aad80f376811c22008650066faa788e4