[INFO] cloning repository https://github.com/5g4s/math-algorithm-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/5g4s/math-algorithm-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F5g4s%2Fmath-algorithm-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F5g4s%2Fmath-algorithm-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 99fe5bb050e8d209b69a3f37b68a3c65e9c8bb7b
[INFO] checking 5g4s/math-algorithm-book against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F5g4s%2Fmath-algorithm-book" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/5g4s/math-algorithm-book 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/5g4s/math-algorithm-book
[INFO] finished tweaking git repo https://github.com/5g4s/math-algorithm-book
[INFO] tweaked toml for git repo https://github.com/5g4s/math-algorithm-book written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/5g4s/math-algorithm-book 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 ...
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[INFO] [stderr]   Downloaded nalgebra v0.32.2
[INFO] [stderr]   Downloaded bitset-fixed v0.1.0
[INFO] [stderr]   Downloaded rand_xoshiro v0.4.0
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[INFO] [stderr]   Downloaded ndarray v0.13.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4402b70ba8aace3dbb7b167e115d5352e84022dd0266c1483bbe4537ed55ab7c
[INFO] running `Command { std: "docker" "start" "-a" "4402b70ba8aace3dbb7b167e115d5352e84022dd0266c1483bbe4537ed55ab7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4402b70ba8aace3dbb7b167e115d5352e84022dd0266c1483bbe4537ed55ab7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4402b70ba8aace3dbb7b167e115d5352e84022dd0266c1483bbe4537ed55ab7c", kill_on_drop: false }`
[INFO] [stdout] 4402b70ba8aace3dbb7b167e115d5352e84022dd0266c1483bbe4537ed55ab7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 0de1dace28e1d62f46542b0b8021a844e0df43f6109e02ef280c43b951603d9f
[INFO] running `Command { std: "docker" "start" "-a" "0de1dace28e1d62f46542b0b8021a844e0df43f6109e02ef280c43b951603d9f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking bytemuck v1.14.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking safe_arch v0.7.1
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling matrixmultiply v0.3.8
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling im-rc v14.3.0
[INFO] [stderr]     Checking wide v0.7.12
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking sized-chunks v0.5.3
[INFO] [stderr]     Checking rand v0.7.3
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[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking itertools v0.8.2
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[INFO] [stderr]     Checking regex-syntax v0.6.17
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[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking simba v0.8.1
[INFO] [stderr]     Checking num v0.2.1
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[INFO] [stderr]     Checking itertools-num v0.1.3
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[INFO] [stderr]     Checking text_io v0.1.8
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]    Compiling nalgebra-macros v0.2.1
[INFO] [stderr]    Compiling proconio-derive v0.2.1
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stderr]     Checking proconio v0.4.5
[INFO] [stderr]     Checking nalgebra v0.32.2
[INFO] [stderr]     Checking math-and-algorithm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 51.20s
[INFO] running `Command { std: "docker" "inspect" "0de1dace28e1d62f46542b0b8021a844e0df43f6109e02ef280c43b951603d9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0de1dace28e1d62f46542b0b8021a844e0df43f6109e02ef280c43b951603d9f", kill_on_drop: false }`
[INFO] [stdout] 0de1dace28e1d62f46542b0b8021a844e0df43f6109e02ef280c43b951603d9f
[INFO] checking 5g4s/math-algorithm-book against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F5g4s%2Fmath-algorithm-book" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/5g4s/math-algorithm-book 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/5g4s/math-algorithm-book
[INFO] finished tweaking git repo https://github.com/5g4s/math-algorithm-book
[INFO] tweaked toml for git repo https://github.com/5g4s/math-algorithm-book written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/5g4s/math-algorithm-book 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 3de5a7db43be5db07032951abede4b5a6a130385abc3e15fe4dc5a9a9cd4e0a7
[INFO] running `Command { std: "docker" "start" "-a" "3de5a7db43be5db07032951abede4b5a6a130385abc3e15fe4dc5a9a9cd4e0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3de5a7db43be5db07032951abede4b5a6a130385abc3e15fe4dc5a9a9cd4e0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3de5a7db43be5db07032951abede4b5a6a130385abc3e15fe4dc5a9a9cd4e0a7", kill_on_drop: false }`
[INFO] [stdout] 3de5a7db43be5db07032951abede4b5a6a130385abc3e15fe4dc5a9a9cd4e0a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4c90ba211b1d9402e80011a4961b39b81be9dc6ec1f061a242897f2e12ffcb97
[INFO] running `Command { std: "docker" "start" "-a" "4c90ba211b1d9402e80011a4961b39b81be9dc6ec1f061a242897f2e12ffcb97", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
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[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling memchr v2.3.3
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[INFO] running `Command { std: "docker" "inspect" "4c90ba211b1d9402e80011a4961b39b81be9dc6ec1f061a242897f2e12ffcb97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c90ba211b1d9402e80011a4961b39b81be9dc6ec1f061a242897f2e12ffcb97", kill_on_drop: false }`
[INFO] [stdout] 4c90ba211b1d9402e80011a4961b39b81be9dc6ec1f061a242897f2e12ffcb97