[INFO] fetching crate rug 1.28.0...
[INFO] building rug-1.28.0 against try#58b1b3c5342a414c161338871f8004258ccef2a7 for pr-149937
[INFO] extracting crate rug 1.28.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate rug 1.28.0
[INFO] finished tweaking crates.io crate rug 1.28.0
[INFO] tweaked toml for crates.io crate rug 1.28.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rug 1.28.0 on toolchain 58b1b3c5342a414c161338871f8004258ccef2a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rug 1.28.0 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" "+58b1b3c5342a414c161338871f8004258ccef2a7" "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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d205a20effb9a1629359053138a1b677e8c3afb647a804a3657c5895fc0038a8
[INFO] running `Command { std: "docker" "start" "-a" "d205a20effb9a1629359053138a1b677e8c3afb647a804a3657c5895fc0038a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d205a20effb9a1629359053138a1b677e8c3afb647a804a3657c5895fc0038a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d205a20effb9a1629359053138a1b677e8c3afb647a804a3657c5895fc0038a8", kill_on_drop: false }`
[INFO] [stdout] d205a20effb9a1629359053138a1b677e8c3afb647a804a3657c5895fc0038a8
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+58b1b3c5342a414c161338871f8004258ccef2a7" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e7e046e7ae0e5114243c24593c9b18cc089188a159fe932ef3ad2bfd249978b
[INFO] running `Command { std: "docker" "start" "-a" "6e7e046e7ae0e5114243c24593c9b18cc089188a159fe932ef3ad2bfd249978b", kill_on_drop: false }`
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.7
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling rug v1.28.0 (/opt/rustwide/workdir)
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "6e7e046e7ae0e5114243c24593c9b18cc089188a159fe932ef3ad2bfd249978b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e7e046e7ae0e5114243c24593c9b18cc089188a159fe932ef3ad2bfd249978b", kill_on_drop: false }`
[INFO] [stdout] 6e7e046e7ae0e5114243c24593c9b18cc089188a159fe932ef3ad2bfd249978b