[INFO] fetching crate remi-core 0.4.3...
[INFO] checking remi-core-0.4.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate remi-core 0.4.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate remi-core 0.4.3 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate remi-core 0.4.3
[INFO] finished tweaking crates.io crate remi-core 0.4.3
[INFO] tweaked toml for crates.io crate remi-core 0.4.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 31 packages
[INFO] [stderr]       Adding darling v0.14.4 (latest: v0.20.8)
[INFO] [stderr]       Adding darling_core v0.14.4 (latest: v0.20.8)
[INFO] [stderr]       Adding darling_macro v0.14.4 (latest: v0.20.8)
[INFO] [stderr]       Adding derive_builder v0.12.0 (latest: v0.20.0)
[INFO] [stderr]       Adding derive_builder_core v0.12.0 (latest: v0.20.0)
[INFO] [stderr]       Adding derive_builder_macro v0.12.0 (latest: v0.20.0)
[INFO] [stderr]       Adding strsim v0.10.0 (latest: v0.11.1)
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7a192b0e0468f2b4f64182e8e2dd317dde551ef95fa9ab262e30906e62e04c8b
[INFO] running `Command { std: "docker" "start" "-a" "7a192b0e0468f2b4f64182e8e2dd317dde551ef95fa9ab262e30906e62e04c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a192b0e0468f2b4f64182e8e2dd317dde551ef95fa9ab262e30906e62e04c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a192b0e0468f2b4f64182e8e2dd317dde551ef95fa9ab262e30906e62e04c8b", kill_on_drop: false }`
[INFO] [stdout] 7a192b0e0468f2b4f64182e8e2dd317dde551ef95fa9ab262e30906e62e04c8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c1094da15878a17bbfc0bed9e36d90e8e49498b7e6e4c2446b1a8ec416f309c
[INFO] running `Command { std: "docker" "start" "-a" "1c1094da15878a17bbfc0bed9e36d90e8e49498b7e6e4c2446b1a8ec416f309c", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling derive_builder_core v0.12.0
[INFO] [stderr]    Compiling derive_builder_macro v0.12.0
[INFO] [stderr]     Checking derive_builder v0.12.0
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking remi-core v0.4.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.47s
[INFO] running `Command { std: "docker" "inspect" "1c1094da15878a17bbfc0bed9e36d90e8e49498b7e6e4c2446b1a8ec416f309c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c1094da15878a17bbfc0bed9e36d90e8e49498b7e6e4c2446b1a8ec416f309c", kill_on_drop: false }`
[INFO] [stdout] 1c1094da15878a17bbfc0bed9e36d90e8e49498b7e6e4c2446b1a8ec416f309c
[INFO] checking remi-core-0.4.3 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate remi-core 0.4.3 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate remi-core 0.4.3 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate remi-core 0.4.3
[INFO] finished tweaking crates.io crate remi-core 0.4.3
[INFO] tweaked toml for crates.io crate remi-core 0.4.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 31 packages
[INFO] [stderr]       Adding darling v0.14.4 (latest: v0.20.8)
[INFO] [stderr]       Adding darling_core v0.14.4 (latest: v0.20.8)
[INFO] [stderr]       Adding darling_macro v0.14.4 (latest: v0.20.8)
[INFO] [stderr]       Adding derive_builder v0.12.0 (latest: v0.20.0)
[INFO] [stderr]       Adding derive_builder_core v0.12.0 (latest: v0.20.0)
[INFO] [stderr]       Adding derive_builder_macro v0.12.0 (latest: v0.20.0)
[INFO] [stderr]       Adding strsim v0.10.0 (latest: v0.11.1)
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 505ee76f5d763786fe05f015cadc954757aacb38bb65ddfb65e178d0b51fdf49
[INFO] running `Command { std: "docker" "start" "-a" "505ee76f5d763786fe05f015cadc954757aacb38bb65ddfb65e178d0b51fdf49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "505ee76f5d763786fe05f015cadc954757aacb38bb65ddfb65e178d0b51fdf49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "505ee76f5d763786fe05f015cadc954757aacb38bb65ddfb65e178d0b51fdf49", kill_on_drop: false }`
[INFO] [stdout] 505ee76f5d763786fe05f015cadc954757aacb38bb65ddfb65e178d0b51fdf49
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 061bb3332da36d2f839681a4d9eeea1cc243a3d8853b0aafe8a63fc1eff636e6
[INFO] running `Command { std: "docker" "start" "-a" "061bb3332da36d2f839681a4d9eeea1cc243a3d8853b0aafe8a63fc1eff636e6", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling derive_builder_core v0.12.0
[INFO] [stderr]    Compiling derive_builder_macro v0.12.0
[INFO] [stderr]     Checking derive_builder v0.12.0
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking remi-core v0.4.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.59s
[INFO] running `Command { std: "docker" "inspect" "061bb3332da36d2f839681a4d9eeea1cc243a3d8853b0aafe8a63fc1eff636e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "061bb3332da36d2f839681a4d9eeea1cc243a3d8853b0aafe8a63fc1eff636e6", kill_on_drop: false }`
[INFO] [stdout] 061bb3332da36d2f839681a4d9eeea1cc243a3d8853b0aafe8a63fc1eff636e6