[INFO] fetching crate anystruct 0.1.0...
[INFO] checking anystruct-0.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate anystruct 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate anystruct 0.1.0 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 anystruct 0.1.0
[INFO] finished tweaking crates.io crate anystruct 0.1.0
[INFO] tweaked toml for crates.io crate anystruct 0.1.0 written to /workspace/builds/worker-5-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 18 packages
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding prost v0.11.9 (latest: v0.12.3)
[INFO] [stderr]       Adding prost-derive v0.11.9 (latest: v0.12.3)
[INFO] [stderr]       Adding prost-types v0.11.9 (latest: v0.12.3)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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 prost v0.11.9
[INFO] [stderr]   Downloaded prost-types v0.11.9
[INFO] [stderr]   Downloaded prost-derive v0.11.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 1a02355314d72881f6a279eae90ff1efa3fdd27c8b65e1f373ff8d24d0870b25
[INFO] running `Command { std: "docker" "start" "-a" "1a02355314d72881f6a279eae90ff1efa3fdd27c8b65e1f373ff8d24d0870b25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a02355314d72881f6a279eae90ff1efa3fdd27c8b65e1f373ff8d24d0870b25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a02355314d72881f6a279eae90ff1efa3fdd27c8b65e1f373ff8d24d0870b25", kill_on_drop: false }`
[INFO] [stdout] 1a02355314d72881f6a279eae90ff1efa3fdd27c8b65e1f373ff8d24d0870b25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] c6c6206cc0ca186e80e2313edecf56d64a5f217b221d5acb61d52f062680330d
[INFO] running `Command { std: "docker" "start" "-a" "c6c6206cc0ca186e80e2313edecf56d64a5f217b221d5acb61d52f062680330d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling prost-derive v0.11.9
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking prost v0.11.9
[INFO] [stderr]     Checking prost-types v0.11.9
[INFO] [stderr]     Checking anystruct v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::BTreeMap`
[INFO] [stdout]  --> tests/basic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::BTreeMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 4.61s
[INFO] running `Command { std: "docker" "inspect" "c6c6206cc0ca186e80e2313edecf56d64a5f217b221d5acb61d52f062680330d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6c6206cc0ca186e80e2313edecf56d64a5f217b221d5acb61d52f062680330d", kill_on_drop: false }`
[INFO] [stdout] c6c6206cc0ca186e80e2313edecf56d64a5f217b221d5acb61d52f062680330d