[INFO] cloning repository https://github.com/9dl/RSerials
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/9dl/RSerials" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F9dl%2FRSerials", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F9dl%2FRSerials'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 46f9e006514ca6619402643053d76e40af96e608
[INFO] checking 9dl/RSerials against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F9dl%2FRSerials" "/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/9dl/RSerials 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/9dl/RSerials
[INFO] finished tweaking git repo https://github.com/9dl/RSerials
[INFO] tweaked toml for git repo https://github.com/9dl/RSerials written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/9dl/RSerials 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]  Downloading crates ...
[INFO] [stderr]   Downloaded rayon v1.8.1
[INFO] [stderr]   Downloaded sysinfo v0.30.5
[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] c1213390baa759ba0d06e9421e3ac5949b7c16aed1fd8a1990894ad88ceaaff3
[INFO] running `Command { std: "docker" "start" "-a" "c1213390baa759ba0d06e9421e3ac5949b7c16aed1fd8a1990894ad88ceaaff3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1213390baa759ba0d06e9421e3ac5949b7c16aed1fd8a1990894ad88ceaaff3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1213390baa759ba0d06e9421e3ac5949b7c16aed1fd8a1990894ad88ceaaff3", kill_on_drop: false }`
[INFO] [stdout] c1213390baa759ba0d06e9421e3ac5949b7c16aed1fd8a1990894ad88ceaaff3
[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] b3ef07d70e2507ce8e9e8bf1b3a19e10ee6d2d9a56c86bc8e9529273c9467a88
[INFO] running `Command { std: "docker" "start" "-a" "b3ef07d70e2507ce8e9e8bf1b3a19e10ee6d2d9a56c86bc8e9529273c9467a88", kill_on_drop: false }`
[INFO] [stderr]     Checking colored v2.1.0
[INFO] [stderr]     Checking rayon v1.8.1
[INFO] [stderr]     Checking sysinfo v0.30.5
[INFO] [stderr]     Checking Woofer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.60s
[INFO] running `Command { std: "docker" "inspect" "b3ef07d70e2507ce8e9e8bf1b3a19e10ee6d2d9a56c86bc8e9529273c9467a88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3ef07d70e2507ce8e9e8bf1b3a19e10ee6d2d9a56c86bc8e9529273c9467a88", kill_on_drop: false }`
[INFO] [stdout] b3ef07d70e2507ce8e9e8bf1b3a19e10ee6d2d9a56c86bc8e9529273c9467a88
[INFO] checking 9dl/RSerials against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F9dl%2FRSerials" "/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/9dl/RSerials 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/9dl/RSerials
[INFO] finished tweaking git repo https://github.com/9dl/RSerials
[INFO] tweaked toml for git repo https://github.com/9dl/RSerials written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/9dl/RSerials 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] 3a5924734a3fd931451e62ba4aa2afc6e4241f312e11a33d6da42ce56c1338e1
[INFO] running `Command { std: "docker" "start" "-a" "3a5924734a3fd931451e62ba4aa2afc6e4241f312e11a33d6da42ce56c1338e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a5924734a3fd931451e62ba4aa2afc6e4241f312e11a33d6da42ce56c1338e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a5924734a3fd931451e62ba4aa2afc6e4241f312e11a33d6da42ce56c1338e1", kill_on_drop: false }`
[INFO] [stdout] 3a5924734a3fd931451e62ba4aa2afc6e4241f312e11a33d6da42ce56c1338e1
[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] 810d15f4a57c610a589c0f6f1a0c0ba0e5ece8dd1e713774024216745aefd099
[INFO] running `Command { std: "docker" "start" "-a" "810d15f4a57c610a589c0f6f1a0c0ba0e5ece8dd1e713774024216745aefd099", kill_on_drop: false }`
[INFO] [stderr]     Checking rayon v1.8.1
[INFO] [stderr]     Checking colored v2.1.0
[INFO] [stderr]     Checking sysinfo v0.30.5
[INFO] [stderr]     Checking Woofer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.27s
[INFO] running `Command { std: "docker" "inspect" "810d15f4a57c610a589c0f6f1a0c0ba0e5ece8dd1e713774024216745aefd099", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "810d15f4a57c610a589c0f6f1a0c0ba0e5ece8dd1e713774024216745aefd099", kill_on_drop: false }`
[INFO] [stdout] 810d15f4a57c610a589c0f6f1a0c0ba0e5ece8dd1e713774024216745aefd099