[INFO] cloning repository https://github.com/mrzenioszeniou/nihilists
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mrzenioszeniou/nihilists" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrzenioszeniou%2Fnihilists", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrzenioszeniou%2Fnihilists'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 77cc296649c2075086d7c73e25f2bd0f6db3e814
[INFO] checking mrzenioszeniou/nihilists against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrzenioszeniou%2Fnihilists" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mrzenioszeniou/nihilists 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 git repo https://github.com/mrzenioszeniou/nihilists
[INFO] finished tweaking git repo https://github.com/mrzenioszeniou/nihilists
[INFO] tweaked toml for git repo https://github.com/mrzenioszeniou/nihilists written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mrzenioszeniou/nihilists 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 strum_macros v0.24.0
[INFO] [stderr]   Downloaded strum v0.24.0
[INFO] [stderr]   Downloaded tui v0.17.0
[INFO] [stderr]   Downloaded emoji v0.2.1
[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] 5b0b68eb87532d41faa15ffba8d23209a912fe5e95dfd879f87b73b09326d2d2
[INFO] running `Command { std: "docker" "start" "-a" "5b0b68eb87532d41faa15ffba8d23209a912fe5e95dfd879f87b73b09326d2d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b0b68eb87532d41faa15ffba8d23209a912fe5e95dfd879f87b73b09326d2d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b0b68eb87532d41faa15ffba8d23209a912fe5e95dfd879f87b73b09326d2d2", kill_on_drop: false }`
[INFO] [stdout] 5b0b68eb87532d41faa15ffba8d23209a912fe5e95dfd879f87b73b09326d2d2
[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] 7482e6acb825edddb27d12460a10758a1eea04ec68547f464288a361f9432bdd
[INFO] running `Command { std: "docker" "start" "-a" "7482e6acb825edddb27d12460a10758a1eea04ec68547f464288a361f9432bdd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]     Checking unicode-segmentation v1.9.0
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking signal-hook-mio v0.2.1
[INFO] [stderr]     Checking crossterm v0.22.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]     Checking tui v0.17.0
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling strum_macros v0.24.0
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking ctrlc v3.2.1
[INFO] [stderr]     Checking emoji v0.2.1
[INFO] [stderr]     Checking strum v0.24.0
[INFO] [stderr]     Checking nihilists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 30.18s
[INFO] running `Command { std: "docker" "inspect" "7482e6acb825edddb27d12460a10758a1eea04ec68547f464288a361f9432bdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7482e6acb825edddb27d12460a10758a1eea04ec68547f464288a361f9432bdd", kill_on_drop: false }`
[INFO] [stdout] 7482e6acb825edddb27d12460a10758a1eea04ec68547f464288a361f9432bdd
[INFO] checking mrzenioszeniou/nihilists against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmrzenioszeniou%2Fnihilists" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mrzenioszeniou/nihilists 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 git repo https://github.com/mrzenioszeniou/nihilists
[INFO] finished tweaking git repo https://github.com/mrzenioszeniou/nihilists
[INFO] tweaked toml for git repo https://github.com/mrzenioszeniou/nihilists written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mrzenioszeniou/nihilists 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] d53889c2794c23ff2288bd6f3ca325310f3b3da6c3ac57668848379acf743fda
[INFO] running `Command { std: "docker" "start" "-a" "d53889c2794c23ff2288bd6f3ca325310f3b3da6c3ac57668848379acf743fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d53889c2794c23ff2288bd6f3ca325310f3b3da6c3ac57668848379acf743fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d53889c2794c23ff2288bd6f3ca325310f3b3da6c3ac57668848379acf743fda", kill_on_drop: false }`
[INFO] [stdout] d53889c2794c23ff2288bd6f3ca325310f3b3da6c3ac57668848379acf743fda
[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] a1ca3592a96ccb680b5d6d4ca1917052922ba288eae65c4db654bcf0e416d4ad
[INFO] running `Command { std: "docker" "start" "-a" "a1ca3592a96ccb680b5d6d4ca1917052922ba288eae65c4db654bcf0e416d4ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking fuzzy-matcher v0.3.7
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking signal-hook-mio v0.2.1
[INFO] [stderr]     Checking crossterm v0.22.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]     Checking tui v0.17.0
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling strum_macros v0.24.0
[INFO] [stderr]     Checking ctrlc v3.2.1
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking emoji v0.2.1
[INFO] [stderr]     Checking strum v0.24.0
[INFO] [stderr]     Checking nihilists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.65s
[INFO] running `Command { std: "docker" "inspect" "a1ca3592a96ccb680b5d6d4ca1917052922ba288eae65c4db654bcf0e416d4ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1ca3592a96ccb680b5d6d4ca1917052922ba288eae65c4db654bcf0e416d4ad", kill_on_drop: false }`
[INFO] [stdout] a1ca3592a96ccb680b5d6d4ca1917052922ba288eae65c4db654bcf0e416d4ad