[INFO] fetching crate byteserde 0.5.0...
[INFO] checking byteserde-0.5.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate byteserde 0.5.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate byteserde 0.5.0 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 byteserde 0.5.0
[INFO] finished tweaking crates.io crate byteserde 0.5.0
[INFO] tweaked toml for crates.io crate byteserde 0.5.0 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 34 packages
[INFO] [stderr]       Adding env_logger v0.10.2 (latest: v0.11.3)
[INFO] [stderr]       Adding term v0.2.14 (latest: v0.7.0)
[INFO] [stderr]       Adding winapi v0.2.8 (latest: v0.3.9)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded term v0.2.14
[INFO] [stderr]   Downloaded text-diff v0.4.0
[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] 13e62223531dd721d5677fe2db197de57a5cbce1b3928bdb3d7fe8f07398c5a1
[INFO] running `Command { std: "docker" "start" "-a" "13e62223531dd721d5677fe2db197de57a5cbce1b3928bdb3d7fe8f07398c5a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13e62223531dd721d5677fe2db197de57a5cbce1b3928bdb3d7fe8f07398c5a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13e62223531dd721d5677fe2db197de57a5cbce1b3928bdb3d7fe8f07398c5a1", kill_on_drop: false }`
[INFO] [stdout] 13e62223531dd721d5677fe2db197de57a5cbce1b3928bdb3d7fe8f07398c5a1
[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] 5310c7fb3f5eef2b58fbbbb2f477988e960bcffc1698bb4316738fe5c6cd9772
[INFO] running `Command { std: "docker" "start" "-a" "5310c7fb3f5eef2b58fbbbb2f477988e960bcffc1698bb4316738fe5c6cd9772", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking byteserde v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking term v0.2.14
[INFO] [stderr]     Checking text-diff v0.4.0
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "5310c7fb3f5eef2b58fbbbb2f477988e960bcffc1698bb4316738fe5c6cd9772", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5310c7fb3f5eef2b58fbbbb2f477988e960bcffc1698bb4316738fe5c6cd9772", kill_on_drop: false }`
[INFO] [stdout] 5310c7fb3f5eef2b58fbbbb2f477988e960bcffc1698bb4316738fe5c6cd9772
[INFO] checking byteserde-0.5.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate byteserde 0.5.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate byteserde 0.5.0 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 byteserde 0.5.0
[INFO] finished tweaking crates.io crate byteserde 0.5.0
[INFO] tweaked toml for crates.io crate byteserde 0.5.0 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 34 packages
[INFO] [stderr]       Adding env_logger v0.10.2 (latest: v0.11.3)
[INFO] [stderr]       Adding term v0.2.14 (latest: v0.7.0)
[INFO] [stderr]       Adding winapi v0.2.8 (latest: v0.3.9)
[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] c0e092c47634ee2346b6a1ed51b07ed528138c1840655e53d9324f3ca193d0a9
[INFO] running `Command { std: "docker" "start" "-a" "c0e092c47634ee2346b6a1ed51b07ed528138c1840655e53d9324f3ca193d0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0e092c47634ee2346b6a1ed51b07ed528138c1840655e53d9324f3ca193d0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0e092c47634ee2346b6a1ed51b07ed528138c1840655e53d9324f3ca193d0a9", kill_on_drop: false }`
[INFO] [stdout] c0e092c47634ee2346b6a1ed51b07ed528138c1840655e53d9324f3ca193d0a9
[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] 5c00963ec30d71292f783fe52514cef51406c266256feec1cdc84db5ab59f31e
[INFO] running `Command { std: "docker" "start" "-a" "5c00963ec30d71292f783fe52514cef51406c266256feec1cdc84db5ab59f31e", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking byteserde v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking term v0.2.14
[INFO] [stderr]     Checking text-diff v0.4.0
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `Command { std: "docker" "inspect" "5c00963ec30d71292f783fe52514cef51406c266256feec1cdc84db5ab59f31e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c00963ec30d71292f783fe52514cef51406c266256feec1cdc84db5ab59f31e", kill_on_drop: false }`
[INFO] [stdout] 5c00963ec30d71292f783fe52514cef51406c266256feec1cdc84db5ab59f31e