[INFO] cloning repository https://github.com/kngwyu/fsl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kngwyu/fsl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkngwyu%2Ffsl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkngwyu%2Ffsl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3d48051911e3bfce9ba1c91b6225a64e74c779fa
[INFO] checking kngwyu/fsl against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkngwyu%2Ffsl" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kngwyu/fsl 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/kngwyu/fsl
[INFO] finished tweaking git repo https://github.com/kngwyu/fsl
[INFO] tweaked toml for git repo https://github.com/kngwyu/fsl written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kngwyu/fsl 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.9
[INFO] [stderr]   Downloaded proc-macro-error-attr v0.4.11
[INFO] [stderr]   Downloaded syn-mid v0.5.0
[INFO] [stderr]   Downloaded proc-macro-error v0.4.11
[INFO] [stderr]   Downloaded structopt-derive v0.4.4
[INFO] [stderr]   Downloaded structopt v0.3.11
[INFO] [stderr]   Downloaded version_check v0.9.1
[INFO] [stderr]   Downloaded anyhow v1.0.26
[INFO] [stderr]   Downloaded crossterm_winapi v0.6.1
[INFO] [stderr]   Downloaded lock_api v0.3.3
[INFO] [stderr]   Downloaded parking_lot v0.10.0
[INFO] [stderr]   Downloaded mio v0.6.21
[INFO] [stderr]   Downloaded libc v0.2.67
[INFO] [stderr]   Downloaded arc-swap v0.4.4
[INFO] [stderr]   Downloaded crossterm v0.16.0
[INFO] [stderr]   Downloaded euclid v0.20.7
[INFO] [stderr]   Downloaded unicode-segmentation v1.6.0
[INFO] [stderr]   Downloaded syn v1.0.16
[INFO] [stderr]   Downloaded smallvec v1.2.0
[INFO] [stderr]   Downloaded parking_lot_core v0.7.0
[INFO] [stderr]   Downloaded signal-hook-registry v1.2.0
[INFO] [stderr]   Downloaded signal-hook v0.1.13
[INFO] [stderr]   Downloaded hermit-abi v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] cce467a343b1bde2bec7ca01389be6af639a8f3ee787b23268c5cc2a0a41b9b3
[INFO] running `Command { std: "docker" "start" "-a" "cce467a343b1bde2bec7ca01389be6af639a8f3ee787b23268c5cc2a0a41b9b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cce467a343b1bde2bec7ca01389be6af639a8f3ee787b23268c5cc2a0a41b9b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cce467a343b1bde2bec7ca01389be6af639a8f3ee787b23268c5cc2a0a41b9b3", kill_on_drop: false }`
[INFO] [stdout] cce467a343b1bde2bec7ca01389be6af639a8f3ee787b23268c5cc2a0a41b9b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a3880098ff16955d06fa6ae20a12d20d3d7e8c7ddde933f00ad19c072d7824cb
[INFO] running `Command { std: "docker" "start" "-a" "a3880098ff16955d06fa6ae20a12d20d3d7e8c7ddde933f00ad19c072d7824cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking arc-swap v0.4.4
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking lock_api v0.3.3
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.11
[INFO] [stderr]    Compiling proc-macro-error v0.4.11
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]     Checking euclid v0.20.7
[INFO] [stderr]     Checking signal-hook v0.1.13
[INFO] [stderr]     Checking crossterm v0.16.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling structopt-derive v0.4.4
[INFO] [stderr]     Checking structopt v0.3.11
[INFO] [stderr]     Checking fsl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.79s
[INFO] running `Command { std: "docker" "inspect" "a3880098ff16955d06fa6ae20a12d20d3d7e8c7ddde933f00ad19c072d7824cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3880098ff16955d06fa6ae20a12d20d3d7e8c7ddde933f00ad19c072d7824cb", kill_on_drop: false }`
[INFO] [stdout] a3880098ff16955d06fa6ae20a12d20d3d7e8c7ddde933f00ad19c072d7824cb
[INFO] checking kngwyu/fsl against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkngwyu%2Ffsl" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kngwyu/fsl 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/kngwyu/fsl
[INFO] finished tweaking git repo https://github.com/kngwyu/fsl
[INFO] tweaked toml for git repo https://github.com/kngwyu/fsl written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/kngwyu/fsl 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f8cdd9ebf0ea9cc03ecc9d0734fcaad677987af91b5c92a27850f4005948669d
[INFO] running `Command { std: "docker" "start" "-a" "f8cdd9ebf0ea9cc03ecc9d0734fcaad677987af91b5c92a27850f4005948669d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8cdd9ebf0ea9cc03ecc9d0734fcaad677987af91b5c92a27850f4005948669d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8cdd9ebf0ea9cc03ecc9d0734fcaad677987af91b5c92a27850f4005948669d", kill_on_drop: false }`
[INFO] [stdout] f8cdd9ebf0ea9cc03ecc9d0734fcaad677987af91b5c92a27850f4005948669d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 33c07911ea945b6cf4d6dfebb27572347e10288eb1fac2ba7fed38ed906674ef
[INFO] running `Command { std: "docker" "start" "-a" "33c07911ea945b6cf4d6dfebb27572347e10288eb1fac2ba7fed38ed906674ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking arc-swap v0.4.4
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking lock_api v0.3.3
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.11
[INFO] [stderr]    Compiling proc-macro-error v0.4.11
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking euclid v0.20.7
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]     Checking signal-hook v0.1.13
[INFO] [stderr]     Checking crossterm v0.16.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling structopt-derive v0.4.4
[INFO] [stderr]     Checking structopt v0.3.11
[INFO] [stderr]     Checking fsl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.72s
[INFO] running `Command { std: "docker" "inspect" "33c07911ea945b6cf4d6dfebb27572347e10288eb1fac2ba7fed38ed906674ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33c07911ea945b6cf4d6dfebb27572347e10288eb1fac2ba7fed38ed906674ef", kill_on_drop: false }`
[INFO] [stdout] 33c07911ea945b6cf4d6dfebb27572347e10288eb1fac2ba7fed38ed906674ef