[INFO] cloning repository https://github.com/periodically-makes-puns/markov_entropy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/periodically-makes-puns/markov_entropy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperiodically-makes-puns%2Fmarkov_entropy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperiodically-makes-puns%2Fmarkov_entropy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a21dd942a7ee4c60d65c2f16dff23eedf4741c76
[INFO] checking periodically-makes-puns/markov_entropy against master#3b1b0ef4d80d3117924d91352c8b6ca528708b3c for pr-152996
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperiodically-makes-puns%2Fmarkov_entropy" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/periodically-makes-puns/markov_entropy
[INFO] finished tweaking git repo https://github.com/periodically-makes-puns/markov_entropy
[INFO] tweaked toml for git repo https://github.com/periodically-makes-puns/markov_entropy written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/periodically-makes-puns/markov_entropy on toolchain 3b1b0ef4d80d3117924d91352c8b6ca528708b3c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3b1b0ef4d80d3117924d91352c8b6ca528708b3c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/periodically-makes-puns/markov_entropy 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" "+3b1b0ef4d80d3117924d91352c8b6ca528708b3c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded histo v1.0.0
[INFO] [stderr]   Downloaded streaming-stats v0.1.29
[INFO] [stderr]   Downloaded rug v1.24.1
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.6.4
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3b1b0ef4d80d3117924d91352c8b6ca528708b3c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 642d923ef69de1bc0f4a826b6b2a7e2abc4486602440d86c1c0c6705131e669a
[INFO] running `Command { std: "docker" "start" "-a" "642d923ef69de1bc0f4a826b6b2a7e2abc4486602440d86c1c0c6705131e669a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "642d923ef69de1bc0f4a826b6b2a7e2abc4486602440d86c1c0c6705131e669a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "642d923ef69de1bc0f4a826b6b2a7e2abc4486602440d86c1c0c6705131e669a", kill_on_drop: false }`
[INFO] [stdout] 642d923ef69de1bc0f4a826b6b2a7e2abc4486602440d86c1c0c6705131e669a
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3b1b0ef4d80d3117924d91352c8b6ca528708b3c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81de8e5ea4db6ff0ddf11aa78b03b6fcb068e9dec200494ee5c33a0a91f58380
[INFO] running `Command { std: "docker" "start" "-a" "81de8e5ea4db6ff0ddf11aa78b03b6fcb068e9dec200494ee5c33a0a91f58380", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.85
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.4
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling rug v1.24.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]     Checking streaming-stats v0.1.29
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]     Checking histo v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.203
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "81de8e5ea4db6ff0ddf11aa78b03b6fcb068e9dec200494ee5c33a0a91f58380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81de8e5ea4db6ff0ddf11aa78b03b6fcb068e9dec200494ee5c33a0a91f58380", kill_on_drop: false }`
[INFO] [stdout] 81de8e5ea4db6ff0ddf11aa78b03b6fcb068e9dec200494ee5c33a0a91f58380