[INFO] fetching crate wf2_core 0.31.0...
[INFO] testing wf2_core-0.31.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate wf2_core 0.31.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate wf2_core 0.31.0 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 wf2_core 0.31.0
[INFO] finished tweaking crates.io crate wf2_core 0.31.0
[INFO] tweaked toml for crates.io crate wf2_core 0.31.0 written to /workspace/builds/worker-4/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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 2767753f147a12142ae02153a7b74310e4278bc823506e8a9c251bedb22e126d
[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" "2767753f147a12142ae02153a7b74310e4278bc823506e8a9c251bedb22e126d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2767753f147a12142ae02153a7b74310e4278bc823506e8a9c251bedb22e126d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2767753f147a12142ae02153a7b74310e4278bc823506e8a9c251bedb22e126d", kill_on_drop: false }`
[INFO] [stdout] 2767753f147a12142ae02153a7b74310e4278bc823506e8a9c251bedb22e126d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] dd65c17427a56e7b3ce67355b2694496aa014d783a89405ca2f929076234cc2f
[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" "dd65c17427a56e7b3ce67355b2694496aa014d783a89405ca2f929076234cc2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling encode_unicode v0.3.6
[INFO] [stderr]    Compiling filepath v0.1.1
[INFO] [stderr]    Compiling bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling terminal_size v0.1.15
[INFO] [stderr]    Compiling users v0.9.1
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling backtrace v0.3.55
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling from_file_derive v0.1.3
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling openssl v0.10.32
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling http v0.1.21
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling serde_yaml v0.8.15
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling libmath v0.2.1
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling tokio-fs v0.1.7
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling csv v1.1.5
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling from_file v0.1.3
[INFO] [stderr]    Compiling env_proc v0.1.0
[INFO] [stderr]    Compiling zip v0.5.9
[INFO] [stderr]    Compiling prettytable-rs v0.8.0
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr] error: could not compile `http`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name http /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/http-0.1.21/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=739e21a1316d8eea -C extra-filename=-739e21a1316d8eea --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-2c005d8172ffe317.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-751e5967119454f8.rmeta --extern itoa=/opt/rustwide/target/debug/deps/libitoa-6048d71bcce27ffd.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "dd65c17427a56e7b3ce67355b2694496aa014d783a89405ca2f929076234cc2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd65c17427a56e7b3ce67355b2694496aa014d783a89405ca2f929076234cc2f", kill_on_drop: false }`
[INFO] [stdout] dd65c17427a56e7b3ce67355b2694496aa014d783a89405ca2f929076234cc2f