[INFO] cloning repository https://github.com/skrobchik/braille-finder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skrobchik/braille-finder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskrobchik%2Fbraille-finder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskrobchik%2Fbraille-finder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d563de9729169aadb3fe2fd623c6e7b5aafd65f8
[INFO] checking skrobchik/braille-finder against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskrobchik%2Fbraille-finder" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/skrobchik/braille-finder 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/skrobchik/braille-finder
[INFO] finished tweaking git repo https://github.com/skrobchik/braille-finder
[INFO] tweaked toml for git repo https://github.com/skrobchik/braille-finder written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/skrobchik/braille-finder 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] warning: unused manifest key: package.author
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2ad6c591bfcf58c40e352457a4fb4a82f8af74d266c994882ef6d88ef41ee55b
[INFO] running `Command { std: "docker" "start" "-a" "2ad6c591bfcf58c40e352457a4fb4a82f8af74d266c994882ef6d88ef41ee55b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ad6c591bfcf58c40e352457a4fb4a82f8af74d266c994882ef6d88ef41ee55b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ad6c591bfcf58c40e352457a4fb4a82f8af74d266c994882ef6d88ef41ee55b", kill_on_drop: false }`
[INFO] [stdout] 2ad6c591bfcf58c40e352457a4fb4a82f8af74d266c994882ef6d88ef41ee55b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 3e9d546e612e43e5c923955da53b013aa696156530bdfd18316b67832efd6448
[INFO] running `Command { std: "docker" "start" "-a" "3e9d546e612e43e5c923955da53b013aa696156530bdfd18316b67832efd6448", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.author
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.11
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking num_cpus v1.14.0
[INFO] [stderr]     Checking rayon-core v1.9.3
[INFO] [stderr]     Checking rayon v1.5.3
[INFO] [stderr]     Checking braille-finder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.89s
[INFO] running `Command { std: "docker" "inspect" "3e9d546e612e43e5c923955da53b013aa696156530bdfd18316b67832efd6448", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e9d546e612e43e5c923955da53b013aa696156530bdfd18316b67832efd6448", kill_on_drop: false }`
[INFO] [stdout] 3e9d546e612e43e5c923955da53b013aa696156530bdfd18316b67832efd6448
[INFO] checking skrobchik/braille-finder against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskrobchik%2Fbraille-finder" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/skrobchik/braille-finder 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/skrobchik/braille-finder
[INFO] finished tweaking git repo https://github.com/skrobchik/braille-finder
[INFO] tweaked toml for git repo https://github.com/skrobchik/braille-finder written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/skrobchik/braille-finder 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] [stderr] warning: unused manifest key: package.author
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 48fee28e824f1fe0930564192f9467cfac084de9c460e002e7ebabef93d318fc
[INFO] running `Command { std: "docker" "start" "-a" "48fee28e824f1fe0930564192f9467cfac084de9c460e002e7ebabef93d318fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48fee28e824f1fe0930564192f9467cfac084de9c460e002e7ebabef93d318fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48fee28e824f1fe0930564192f9467cfac084de9c460e002e7ebabef93d318fc", kill_on_drop: false }`
[INFO] [stdout] 48fee28e824f1fe0930564192f9467cfac084de9c460e002e7ebabef93d318fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 09b5947284a3e1beb049aed59f7dcee55c049ce1c9c68a34eca1a66dc187963f
[INFO] running `Command { std: "docker" "start" "-a" "09b5947284a3e1beb049aed59f7dcee55c049ce1c9c68a34eca1a66dc187963f", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.author
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.11
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking num_cpus v1.14.0
[INFO] [stderr]     Checking rayon-core v1.9.3
[INFO] [stderr]     Checking rayon v1.5.3
[INFO] [stderr]     Checking braille-finder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.54s
[INFO] running `Command { std: "docker" "inspect" "09b5947284a3e1beb049aed59f7dcee55c049ce1c9c68a34eca1a66dc187963f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09b5947284a3e1beb049aed59f7dcee55c049ce1c9c68a34eca1a66dc187963f", kill_on_drop: false }`
[INFO] [stdout] 09b5947284a3e1beb049aed59f7dcee55c049ce1c9c68a34eca1a66dc187963f