[INFO] fetching crate waseda-moodle-checker 0.4.1...
[INFO] documenting waseda-moodle-checker-0.4.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate waseda-moodle-checker 0.4.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate waseda-moodle-checker 0.4.1 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate waseda-moodle-checker 0.4.1
[INFO] finished tweaking crates.io crate waseda-moodle-checker 0.4.1
[INFO] tweaked toml for crates.io crate waseda-moodle-checker 0.4.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate waseda-moodle-checker 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "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 waseda-moodle v0.2.0
[INFO] [stderr]   Downloaded html-extractor-macros v0.4.0
[INFO] [stderr]   Downloaded html-extractor v0.4.0
[INFO] [stderr]   Downloaded derive_more v0.99.6
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "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] 275f67acc0270eab9e1f769c905968fc1341d65ed7a13065c87900baa680df46
[INFO] running `Command { std: "docker" "start" "-a" "275f67acc0270eab9e1f769c905968fc1341d65ed7a13065c87900baa680df46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "275f67acc0270eab9e1f769c905968fc1341d65ed7a13065c87900baa680df46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "275f67acc0270eab9e1f769c905968fc1341d65ed7a13065c87900baa680df46", kill_on_drop: false }`
[INFO] [stdout] 275f67acc0270eab9e1f769c905968fc1341d65ed7a13065c87900baa680df46
[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" "RUSTDOCFLAGS=--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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2f42f401351d8b66732f3ec9531626067bbc5b7ba2b815ce70e3de7f86cdc65
[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" "f2f42f401351d8b66732f3ec9531626067bbc5b7ba2b815ce70e3de7f86cdc65", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.21
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling dtoa v0.4.5
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling thin-slice v0.1.1
[INFO] [stderr]    Compiling ego-tree v0.6.2
[INFO] [stderr]    Compiling ref_thread_local v0.0.0
[INFO] [stderr]    Compiling ring v0.16.13
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]     Checking addr2line v0.12.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]    Compiling dtoa-short v0.3.2
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling tendril v0.4.1
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking publicsuffix v1.5.4
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling selectors v0.21.0
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]     Checking webpki v0.21.2
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]     Checking ct-logs v0.6.0
[INFO] [stderr]     Checking rustls v0.17.0
[INFO] [stderr]     Checking webpki-roots v0.18.0
[INFO] [stderr]     Checking rustls-native-certs v0.3.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling cssparser v0.25.9
[INFO] [stderr]    Compiling cssparser-macros v0.3.6
[INFO] [stderr]    Compiling html5ever v0.24.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.16
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling derive_more v0.99.6
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[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 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/html5ever-0.24.1/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -Cembed-bitcode=no -C debuginfo=2 -C metadata=4e0a08a6622cf44b -C extra-filename=-4e0a08a6622cf44b --out-dir /opt/rustwide/target/debug/build/html5ever-4e0a08a6622cf44b -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-26c2d43dc71dcaca.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-7fa9c87ac7a00e9a.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-2cdfff12775693d1.rlib --cap-lints allow` (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" "f2f42f401351d8b66732f3ec9531626067bbc5b7ba2b815ce70e3de7f86cdc65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2f42f401351d8b66732f3ec9531626067bbc5b7ba2b815ce70e3de7f86cdc65", kill_on_drop: false }`
[INFO] [stdout] f2f42f401351d8b66732f3ec9531626067bbc5b7ba2b815ce70e3de7f86cdc65