[INFO] cloning repository https://github.com/1000teslas/ackermann
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/1000teslas/ackermann" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1000teslas%2Fackermann", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1000teslas%2Fackermann'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] efb93d34d31d3e9dde3df526daf5e84699daad99
[INFO] testing 1000teslas/ackermann against try#9f93af291970322f4f1c6315ccde4d7078201159 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F1000teslas%2Fackermann" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/1000teslas/ackermann
[INFO] finished tweaking git repo https://github.com/1000teslas/ackermann
[INFO] tweaked toml for git repo https://github.com/1000teslas/ackermann written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/1000teslas/ackermann on toolchain 9f93af291970322f4f1c6315ccde4d7078201159
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/1000teslas/ackermann 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" "+9f93af291970322f4f1c6315ccde4d7078201159" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+9f93af291970322f4f1c6315ccde4d7078201159" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e7a911a9bf1b8d089b1dd48f2ee41f8c4c09942b4c76422c079a6c721b02304
[INFO] running `Command { std: "docker" "start" "-a" "5e7a911a9bf1b8d089b1dd48f2ee41f8c4c09942b4c76422c079a6c721b02304", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e7a911a9bf1b8d089b1dd48f2ee41f8c4c09942b4c76422c079a6c721b02304", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e7a911a9bf1b8d089b1dd48f2ee41f8c4c09942b4c76422c079a6c721b02304", kill_on_drop: false }`
[INFO] [stdout] 5e7a911a9bf1b8d089b1dd48f2ee41f8c4c09942b4c76422c079a6c721b02304
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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" "+9f93af291970322f4f1c6315ccde4d7078201159" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05106d1b07001591bb23a22c48305cc24ce571faa2c34b1e5bda79fa75c03210
[INFO] running `Command { std: "docker" "start" "-a" "05106d1b07001591bb23a22c48305cc24ce571faa2c34b1e5bda79fa75c03210", kill_on_drop: false }`
[INFO] [stderr]    Compiling ackermann v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `a2` is never used
[INFO] [stdout]  --> src/lib.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn a2(m: u64, n: u64) -> u64 {
[INFO] [stdout]   |    ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `scratch`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use scratch::{a_rec, a_iter};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `scratch`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `scratch`, use `cargo add scratch` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ackermann` (bin "ackermann") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "05106d1b07001591bb23a22c48305cc24ce571faa2c34b1e5bda79fa75c03210", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05106d1b07001591bb23a22c48305cc24ce571faa2c34b1e5bda79fa75c03210", kill_on_drop: false }`
[INFO] [stdout] 05106d1b07001591bb23a22c48305cc24ce571faa2c34b1e5bda79fa75c03210
