[INFO] fetching crate mexprp 0.3.0...
[INFO] testing mexprp-0.3.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate mexprp 0.3.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mexprp 0.3.0 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 mexprp 0.3.0
[INFO] finished tweaking crates.io crate mexprp 0.3.0
[INFO] tweaked toml for crates.io crate mexprp 0.3.0 written to /workspace/builds/worker-0/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] [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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 81ea4133207bc9f2e9e21189e2f8058ba815965f379e511dd3cd322628d4ac88
[INFO] running `Command { std: "docker" "start" "-a" "81ea4133207bc9f2e9e21189e2f8058ba815965f379e511dd3cd322628d4ac88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81ea4133207bc9f2e9e21189e2f8058ba815965f379e511dd3cd322628d4ac88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81ea4133207bc9f2e9e21189e2f8058ba815965f379e511dd3cd322628d4ac88", kill_on_drop: false }`
[INFO] [stdout] 81ea4133207bc9f2e9e21189e2f8058ba815965f379e511dd3cd322628d4ac88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7e97c571d8feb7b57a249dd9b1c51d7e96235953293f428784d260469f99e3ab
[INFO] running `Command { std: "docker" "start" "-a" "7e97c571d8feb7b57a249dd9b1c51d7e96235953293f428784d260469f99e3ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.2
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling rug v1.11.0
[INFO] [stderr]    Compiling object v0.22.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.18
[INFO] [stderr]    Compiling az v1.0.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling addr2line v0.14.1
[INFO] [stderr]    Compiling backtrace v0.3.55
[INFO] [stderr]    Compiling failure v0.1.8
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "7e97c571d8feb7b57a249dd9b1c51d7e96235953293f428784d260469f99e3ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e97c571d8feb7b57a249dd9b1c51d7e96235953293f428784d260469f99e3ab", kill_on_drop: false }`
[INFO] [stdout] 7e97c571d8feb7b57a249dd9b1c51d7e96235953293f428784d260469f99e3ab