[INFO] fetching crate voyager 0.1.1...
[INFO] testing voyager-0.1.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate voyager 0.1.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate voyager 0.1.1 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 voyager 0.1.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate voyager 0.1.1
[INFO] tweaked toml for crates.io crate voyager 0.1.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate voyager 0.1.1 already has a lockfile, it will not be regenerated
[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] 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] 4d12da6e9cfcd7a6879d984798c058f6a36cd17708190972b99fade742d1173d
[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" "4d12da6e9cfcd7a6879d984798c058f6a36cd17708190972b99fade742d1173d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d12da6e9cfcd7a6879d984798c058f6a36cd17708190972b99fade742d1173d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d12da6e9cfcd7a6879d984798c058f6a36cd17708190972b99fade742d1173d", kill_on_drop: false }`
[INFO] [stdout] 4d12da6e9cfcd7a6879d984798c058f6a36cd17708190972b99fade742d1173d
[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] c1c9d626d6ac30f333b0483bad62064ae2b56db6419b2f8f37eddba8ce21829e
[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" "c1c9d626d6ac30f333b0483bad62064ae2b56db6419b2f8f37eddba8ce21829e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.56
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling thin-slice v0.1.1
[INFO] [stderr]    Compiling ego-tree v0.6.2
[INFO] [stderr]    Compiling robotstxt v0.2.0
[INFO] [stderr]    Compiling dtoa-short v0.3.3
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling native-tls v0.2.6
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tokio-tls v0.3.1
[INFO] [stderr]    Compiling rand_core v0.6.0
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.0
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr] error: could not compile `html5ever`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name build_script_build --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/html5ever-0.25.1/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C metadata=1a64029f7aba94ad -C extra-filename=-1a64029f7aba94ad --out-dir /opt/rustwide/target/debug/build/html5ever-1a64029f7aba94ad -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-b8449736663a1660.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-4ff43fa145cc0264.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-b9eb3a04dd2dafaa.rlib --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" "c1c9d626d6ac30f333b0483bad62064ae2b56db6419b2f8f37eddba8ce21829e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1c9d626d6ac30f333b0483bad62064ae2b56db6419b2f8f37eddba8ce21829e", kill_on_drop: false }`
[INFO] [stdout] c1c9d626d6ac30f333b0483bad62064ae2b56db6419b2f8f37eddba8ce21829e