[INFO] cloning repository https://github.com/allenli178/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/allenli178/mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fallenli178%2Fmandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fallenli178%2Fmandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4515a985ce870cc68fbd64cf757a7e7317eb537e
[INFO] checking allenli178/mandelbrot against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fallenli178%2Fmandelbrot" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/allenli178/mandelbrot 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/allenli178/mandelbrot
[INFO] finished tweaking git repo https://github.com/allenli178/mandelbrot
[INFO] tweaked toml for git repo https://github.com/allenli178/mandelbrot written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/allenli178/mandelbrot 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-sink v0.3.23
[INFO] [stderr]   Downloaded crossbeam-queue v0.3.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] be69f88907910be85bd51e6ff4383f3c85da9d5137d19b0283a10a14a07f678b
[INFO] running `Command { std: "docker" "start" "-a" "be69f88907910be85bd51e6ff4383f3c85da9d5137d19b0283a10a14a07f678b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be69f88907910be85bd51e6ff4383f3c85da9d5137d19b0283a10a14a07f678b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be69f88907910be85bd51e6ff4383f3c85da9d5137d19b0283a10a14a07f678b", kill_on_drop: false }`
[INFO] [stdout] be69f88907910be85bd51e6ff4383f3c85da9d5137d19b0283a10a14a07f678b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 7367a314031b3d3c935d23b1d59922fbe3a8f71e9af6d788119e47bbeef0deab
[INFO] running `Command { std: "docker" "start" "-a" "7367a314031b3d3c935d23b1d59922fbe3a8f71e9af6d788119e47bbeef0deab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling futures-core v0.3.23
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling crossbeam-queue v0.3.6
[INFO] [stderr]     Checking futures-sink v0.3.23
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking gif v0.11.4
[INFO] [stderr]     Checking bytemuck v1.12.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking png v0.17.5
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking crossbeam v0.8.2
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking jpeg-decoder v0.2.6
[INFO] [stderr]    Compiling pin-project-internal v1.0.12
[INFO] [stderr]     Checking tiff v0.7.3
[INFO] [stderr]     Checking pin-project v1.0.12
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking exr v1.5.0
[INFO] [stderr]     Checking image v0.24.3
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.07s
[INFO] running `Command { std: "docker" "inspect" "7367a314031b3d3c935d23b1d59922fbe3a8f71e9af6d788119e47bbeef0deab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7367a314031b3d3c935d23b1d59922fbe3a8f71e9af6d788119e47bbeef0deab", kill_on_drop: false }`
[INFO] [stdout] 7367a314031b3d3c935d23b1d59922fbe3a8f71e9af6d788119e47bbeef0deab
[INFO] checking allenli178/mandelbrot against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fallenli178%2Fmandelbrot" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/allenli178/mandelbrot 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/allenli178/mandelbrot
[INFO] finished tweaking git repo https://github.com/allenli178/mandelbrot
[INFO] tweaked toml for git repo https://github.com/allenli178/mandelbrot written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/allenli178/mandelbrot 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] a5b2215285caa0cae5cde202a187a1cb83bb1780492c432a91dca8ca242e28fe
[INFO] running `Command { std: "docker" "start" "-a" "a5b2215285caa0cae5cde202a187a1cb83bb1780492c432a91dca8ca242e28fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5b2215285caa0cae5cde202a187a1cb83bb1780492c432a91dca8ca242e28fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5b2215285caa0cae5cde202a187a1cb83bb1780492c432a91dca8ca242e28fe", kill_on_drop: false }`
[INFO] [stdout] a5b2215285caa0cae5cde202a187a1cb83bb1780492c432a91dca8ca242e28fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] efbd218022efc2c63d609b44245c8a47700fa244fbd451a75aeecbe8b07bf955
[INFO] running `Command { std: "docker" "start" "-a" "efbd218022efc2c63d609b44245c8a47700fa244fbd451a75aeecbe8b07bf955", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.10
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling futures-core v0.3.23
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking futures-sink v0.3.23
[INFO] [stderr]    Compiling crossbeam-queue v0.3.6
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking gif v0.11.4
[INFO] [stderr]     Checking bytemuck v1.12.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking spin v0.9.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking png v0.17.5
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking crossbeam v0.8.2
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking jpeg-decoder v0.2.6
[INFO] [stderr]    Compiling pin-project-internal v1.0.12
[INFO] [stderr]     Checking tiff v0.7.3
[INFO] [stderr]     Checking pin-project v1.0.12
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking exr v1.5.0
[INFO] [stderr]     Checking image v0.24.3
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.01s
[INFO] running `Command { std: "docker" "inspect" "efbd218022efc2c63d609b44245c8a47700fa244fbd451a75aeecbe8b07bf955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efbd218022efc2c63d609b44245c8a47700fa244fbd451a75aeecbe8b07bf955", kill_on_drop: false }`
[INFO] [stdout] efbd218022efc2c63d609b44245c8a47700fa244fbd451a75aeecbe8b07bf955