[INFO] fetching crate cubo 0.0.1...
[INFO] checking cubo-0.0.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate cubo 0.0.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate cubo 0.0.1 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cubo 0.0.1
[INFO] finished tweaking crates.io crate cubo 0.0.1
[INFO] tweaked toml for crates.io crate cubo 0.0.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 19 packages
[INFO] [stderr]       Adding ferris-says v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding smallvec v0.4.5 (latest: v1.13.2)
[INFO] [stderr]       Adding textwrap v0.13.4 (latest: v0.16.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smawk v0.3.2
[INFO] [stderr]   Downloaded ferris-says v0.2.1
[INFO] [stderr]   Downloaded textwrap v0.13.4
[INFO] [stderr]   Downloaded smallvec v0.4.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85eb0935000da6449b26c03504c085393c3e034e856b56cc261cacef958f1c40
[INFO] running `Command { std: "docker" "start" "-a" "85eb0935000da6449b26c03504c085393c3e034e856b56cc261cacef958f1c40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85eb0935000da6449b26c03504c085393c3e034e856b56cc261cacef958f1c40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85eb0935000da6449b26c03504c085393c3e034e856b56cc261cacef958f1c40", kill_on_drop: false }`
[INFO] [stdout] 85eb0935000da6449b26c03504c085393c3e034e856b56cc261cacef958f1c40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e231b997803b7eaeb097ea2beee79e892249e5a020d42cd40dfc9021a1b9cec2
[INFO] running `Command { std: "docker" "start" "-a" "e231b997803b7eaeb097ea2beee79e892249e5a020d42cd40dfc9021a1b9cec2", kill_on_drop: false }`
[INFO] [stderr]     Checking smawk v0.3.2
[INFO] [stderr]     Checking smallvec v0.4.5
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.92
[INFO] [stderr]     Checking textwrap v0.13.4
[INFO] [stderr]     Checking ferris-says v0.2.1
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.92
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.92
[INFO] [stderr]     Checking wasm-bindgen v0.2.92
[INFO] [stderr]     Checking cubo v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/lib.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.85s
[INFO] running `Command { std: "docker" "inspect" "e231b997803b7eaeb097ea2beee79e892249e5a020d42cd40dfc9021a1b9cec2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e231b997803b7eaeb097ea2beee79e892249e5a020d42cd40dfc9021a1b9cec2", kill_on_drop: false }`
[INFO] [stdout] e231b997803b7eaeb097ea2beee79e892249e5a020d42cd40dfc9021a1b9cec2