[INFO] fetching crate perf_stats 0.1.8...
[INFO] checking perf_stats-0.1.8 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate perf_stats 0.1.8 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate perf_stats 0.1.8 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 perf_stats 0.1.8
[INFO] finished tweaking crates.io crate perf_stats 0.1.8
[INFO] tweaked toml for crates.io crate perf_stats 0.1.8 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 22 packages
[INFO] [stderr]       Adding permutation v0.2.5 (latest: v0.4.1)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded superslice v1.0.0
[INFO] [stderr]   Downloaded permutation v0.2.5
[INFO] [stderr]   Downloaded vector_utils v0.1.5
[INFO] [stderr]   Downloaded io_utils v0.3.2
[INFO] [stderr]   Downloaded string_utils v0.1.4
[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] 4e2e289fb101194ce0e9b7899c388ee025e87fce9d47f7eba057b4711ec6e683
[INFO] running `Command { std: "docker" "start" "-a" "4e2e289fb101194ce0e9b7899c388ee025e87fce9d47f7eba057b4711ec6e683", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e2e289fb101194ce0e9b7899c388ee025e87fce9d47f7eba057b4711ec6e683", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e2e289fb101194ce0e9b7899c388ee025e87fce9d47f7eba057b4711ec6e683", kill_on_drop: false }`
[INFO] [stdout] 4e2e289fb101194ce0e9b7899c388ee025e87fce9d47f7eba057b4711ec6e683
[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] 16ae78801105bf462907d715cd2b2a3b020086016b371622b769b76976139c52
[INFO] running `Command { std: "docker" "start" "-a" "16ae78801105bf462907d715cd2b2a3b020086016b371622b769b76976139c52", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]     Checking superslice v1.0.0
[INFO] [stderr]     Checking permutation v0.2.5
[INFO] [stderr]    Compiling lz4-sys v1.9.4
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking vector_utils v0.1.5
[INFO] [stderr]     Checking string_utils v0.1.4
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking lz4 v1.24.0
[INFO] [stderr]     Checking io_utils v0.3.2
[INFO] [stderr]     Checking perf_stats v0.1.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.20s
[INFO] running `Command { std: "docker" "inspect" "16ae78801105bf462907d715cd2b2a3b020086016b371622b769b76976139c52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16ae78801105bf462907d715cd2b2a3b020086016b371622b769b76976139c52", kill_on_drop: false }`
[INFO] [stdout] 16ae78801105bf462907d715cd2b2a3b020086016b371622b769b76976139c52
[INFO] checking perf_stats-0.1.8 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate perf_stats 0.1.8 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate perf_stats 0.1.8 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 perf_stats 0.1.8
[INFO] finished tweaking crates.io crate perf_stats 0.1.8
[INFO] tweaked toml for crates.io crate perf_stats 0.1.8 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 22 packages
[INFO] [stderr]       Adding permutation v0.2.5 (latest: v0.4.1)
[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] e7ea473df181aae92745c1126118e48c5e8a2ebb8ae41248f2a2e0dc909b05d2
[INFO] running `Command { std: "docker" "start" "-a" "e7ea473df181aae92745c1126118e48c5e8a2ebb8ae41248f2a2e0dc909b05d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7ea473df181aae92745c1126118e48c5e8a2ebb8ae41248f2a2e0dc909b05d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7ea473df181aae92745c1126118e48c5e8a2ebb8ae41248f2a2e0dc909b05d2", kill_on_drop: false }`
[INFO] [stdout] e7ea473df181aae92745c1126118e48c5e8a2ebb8ae41248f2a2e0dc909b05d2
[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] 930967df242968efc8d8f981b27d34df3dfbccb351b0f0e926d81eff91e755f9
[INFO] running `Command { std: "docker" "start" "-a" "930967df242968efc8d8f981b27d34df3dfbccb351b0f0e926d81eff91e755f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]     Checking permutation v0.2.5
[INFO] [stderr]     Checking superslice v1.0.0
[INFO] [stderr]    Compiling lz4-sys v1.9.4
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking vector_utils v0.1.5
[INFO] [stderr]     Checking string_utils v0.1.4
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking lz4 v1.24.0
[INFO] [stderr]     Checking io_utils v0.3.2
[INFO] [stderr]     Checking perf_stats v0.1.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.67s
[INFO] running `Command { std: "docker" "inspect" "930967df242968efc8d8f981b27d34df3dfbccb351b0f0e926d81eff91e755f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "930967df242968efc8d8f981b27d34df3dfbccb351b0f0e926d81eff91e755f9", kill_on_drop: false }`
[INFO] [stdout] 930967df242968efc8d8f981b27d34df3dfbccb351b0f0e926d81eff91e755f9