[INFO] fetching crate rug-polynomial 0.2.0...
[INFO] checking rug-polynomial-0.2.0 against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] extracting crate rug-polynomial 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate rug-polynomial 0.2.0 on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rug-polynomial 0.2.0
[INFO] finished tweaking crates.io crate rug-polynomial 0.2.0
[INFO] tweaked toml for crates.io crate rug-polynomial 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate rug-polynomial 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quickcheck_macros v0.9.1
[INFO] [stderr]   Downloaded az v1.1.0
[INFO] [stderr]   Downloaded rug v1.11.0
[INFO] [stderr]   Downloaded flint-sys v0.3.0
[INFO] [stderr]   Downloaded rug-fft v0.1.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.22
[INFO] [stderr]   Downloaded syn v1.0.60
[INFO] [stderr]   Downloaded thread_local v1.1.2
[INFO] [stderr]   Downloaded regex v1.4.3
[INFO] [stderr]   Downloaded serde v1.0.123
[INFO] [stderr]   Downloaded serde_derive v1.0.123
[INFO] [stderr]   Downloaded libc v0.2.85
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed778f0c359945957d3d3b25d50bdf15ed2dd435c70b2d7acb621116bf24ae84
[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" "ed778f0c359945957d3d3b25d50bdf15ed2dd435c70b2d7acb621116bf24ae84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed778f0c359945957d3d3b25d50bdf15ed2dd435c70b2d7acb621116bf24ae84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed778f0c359945957d3d3b25d50bdf15ed2dd435c70b2d7acb621116bf24ae84", kill_on_drop: false }`
[INFO] [stdout] ed778f0c359945957d3d3b25d50bdf15ed2dd435c70b2d7acb621116bf24ae84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ccbbf890361afc16e2447e97253e0ca6afde832c60d43a6de0096f9eaee22f56
[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" "ccbbf890361afc16e2447e97253e0ca6afde832c60d43a6de0096f9eaee22f56", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.85
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling rug v1.11.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking thread_local v1.1.2
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]    Compiling flint-sys v0.3.0
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling quickcheck_macros v0.9.1
[INFO] [stderr]     Checking serde v1.0.123
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "ccbbf890361afc16e2447e97253e0ca6afde832c60d43a6de0096f9eaee22f56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccbbf890361afc16e2447e97253e0ca6afde832c60d43a6de0096f9eaee22f56", kill_on_drop: false }`
[INFO] [stdout] ccbbf890361afc16e2447e97253e0ca6afde832c60d43a6de0096f9eaee22f56