[INFO] fetching crate gmp-mpfr-sys 1.4.2...
[INFO] testing gmp-mpfr-sys-1.4.2 against 1.49.0 for beta-1.50-1
[INFO] extracting crate gmp-mpfr-sys 1.4.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate gmp-mpfr-sys 1.4.2 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gmp-mpfr-sys 1.4.2
[INFO] finished tweaking crates.io crate gmp-mpfr-sys 1.4.2
[INFO] tweaked toml for crates.io crate gmp-mpfr-sys 1.4.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e52f1dd5efa2494ce7464f805a37c4dce6f105e1a48897f2d0331e5c7b468fe1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e52f1dd5efa2494ce7464f805a37c4dce6f105e1a48897f2d0331e5c7b468fe1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e52f1dd5efa2494ce7464f805a37c4dce6f105e1a48897f2d0331e5c7b468fe1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e52f1dd5efa2494ce7464f805a37c4dce6f105e1a48897f2d0331e5c7b468fe1", kill_on_drop: false }`
[INFO] [stdout] e52f1dd5efa2494ce7464f805a37c4dce6f105e1a48897f2d0331e5c7b468fe1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f85beef83f3ccc0d9de8818d3a927ca9b097aab4a0e83572bb2abf54ecbda86
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2f85beef83f3ccc0d9de8818d3a927ca9b097aab4a0e83572bb2abf54ecbda86", kill_on_drop: false }`
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.2 (/opt/rustwide/workdir)
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "2f85beef83f3ccc0d9de8818d3a927ca9b097aab4a0e83572bb2abf54ecbda86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f85beef83f3ccc0d9de8818d3a927ca9b097aab4a0e83572bb2abf54ecbda86", kill_on_drop: false }`
[INFO] [stdout] 2f85beef83f3ccc0d9de8818d3a927ca9b097aab4a0e83572bb2abf54ecbda86