[INFO] fetching crate rotate-puts 0.3.0...
[INFO] checking rotate-puts-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rotate-puts 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate rotate-puts 0.3.0 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 rotate-puts 0.3.0
[INFO] finished tweaking crates.io crate rotate-puts 0.3.0
[INFO] tweaked toml for crates.io crate rotate-puts 0.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate rotate-puts 0.3.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded daemonize v0.5.0
[INFO] [stderr]   Downloaded rust_util v0.6.41
[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] 10fab0d6eb50e8f8ad5663bfe4ec05d83c6d89866f2dcac18e477b15a7eb1aa1
[INFO] running `Command { std: "docker" "start" "-a" "10fab0d6eb50e8f8ad5663bfe4ec05d83c6d89866f2dcac18e477b15a7eb1aa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10fab0d6eb50e8f8ad5663bfe4ec05d83c6d89866f2dcac18e477b15a7eb1aa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10fab0d6eb50e8f8ad5663bfe4ec05d83c6d89866f2dcac18e477b15a7eb1aa1", kill_on_drop: false }`
[INFO] [stdout] 10fab0d6eb50e8f8ad5663bfe4ec05d83c6d89866f2dcac18e477b15a7eb1aa1
[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] 8a6942dc67dce64dc377c9a4f8d31a277ce0352161f3f7659fa5b0ea35e4d599
[INFO] running `Command { std: "docker" "start" "-a" "8a6942dc67dce64dc377c9a4f8d31a277ce0352161f3f7659fa5b0ea35e4d599", kill_on_drop: false }`
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking daemonize v0.5.0
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking rust_util v0.6.41
[INFO] [stderr]     Checking rotate-puts v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.94s
[INFO] running `Command { std: "docker" "inspect" "8a6942dc67dce64dc377c9a4f8d31a277ce0352161f3f7659fa5b0ea35e4d599", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a6942dc67dce64dc377c9a4f8d31a277ce0352161f3f7659fa5b0ea35e4d599", kill_on_drop: false }`
[INFO] [stdout] 8a6942dc67dce64dc377c9a4f8d31a277ce0352161f3f7659fa5b0ea35e4d599
[INFO] checking rotate-puts-0.3.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate rotate-puts 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate rotate-puts 0.3.0 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 rotate-puts 0.3.0
[INFO] finished tweaking crates.io crate rotate-puts 0.3.0
[INFO] tweaked toml for crates.io crate rotate-puts 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate rotate-puts 0.3.0 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" "+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] 6791c35b79da006607265f1b6ba06605ad26f7e5d96a719c02482629da319e2b
[INFO] running `Command { std: "docker" "start" "-a" "6791c35b79da006607265f1b6ba06605ad26f7e5d96a719c02482629da319e2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6791c35b79da006607265f1b6ba06605ad26f7e5d96a719c02482629da319e2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6791c35b79da006607265f1b6ba06605ad26f7e5d96a719c02482629da319e2b", kill_on_drop: false }`
[INFO] [stdout] 6791c35b79da006607265f1b6ba06605ad26f7e5d96a719c02482629da319e2b
[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] 34f1aedf51df29af6e9a7c9426ecc9bb3b02a56932ecbef76973dc5b6d67bfa4
[INFO] running `Command { std: "docker" "start" "-a" "34f1aedf51df29af6e9a7c9426ecc9bb3b02a56932ecbef76973dc5b6d67bfa4", kill_on_drop: false }`
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking daemonize v0.5.0
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking rust_util v0.6.41
[INFO] [stderr]     Checking rotate-puts v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `Command { std: "docker" "inspect" "34f1aedf51df29af6e9a7c9426ecc9bb3b02a56932ecbef76973dc5b6d67bfa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34f1aedf51df29af6e9a7c9426ecc9bb3b02a56932ecbef76973dc5b6d67bfa4", kill_on_drop: false }`
[INFO] [stdout] 34f1aedf51df29af6e9a7c9426ecc9bb3b02a56932ecbef76973dc5b6d67bfa4