[INFO] fetching crate mdbook-mermaid 0.5.0...
[INFO] testing mdbook-mermaid-0.5.0 against 1.45.2 for beta-1.46-1
[INFO] extracting crate mdbook-mermaid 0.5.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mdbook-mermaid 0.5.0 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbook-mermaid 0.5.0
[INFO] finished tweaking crates.io crate mdbook-mermaid 0.5.0
[INFO] tweaked toml for crates.io crate mdbook-mermaid 0.5.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate mdbook-mermaid 0.5.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a81515e8aa70f5d72e0429ec8a34b76c47f37cdd3b757e253d69a39a1434c7b2
[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" "a81515e8aa70f5d72e0429ec8a34b76c47f37cdd3b757e253d69a39a1434c7b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a81515e8aa70f5d72e0429ec8a34b76c47f37cdd3b757e253d69a39a1434c7b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a81515e8aa70f5d72e0429ec8a34b76c47f37cdd3b757e253d69a39a1434c7b2", kill_on_drop: false }`
[INFO] [stdout] a81515e8aa70f5d72e0429ec8a34b76c47f37cdd3b757e253d69a39a1434c7b2
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 560da848fd828e205db2ad091deb2e2532c22ee1ab23d92eb420362e974924cd
[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" "560da848fd828e205db2ad091deb2e2532c22ee1ab23d92eb420362e974924cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling siphasher v0.3.2
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling modifier v0.1.0
[INFO] [stderr]    Compiling sequence_trie v0.3.6
[INFO] [stderr]    Compiling pulldown-cmark v0.7.0
[INFO] [stderr]    Compiling is-match v0.1.0
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling gitignore v1.0.6
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling filetime v0.2.9
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling plugin v0.2.6
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling tendril v0.4.1
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling inotify v0.7.0
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling pulldown-cmark v0.6.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling darling_core v0.8.6
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling phf v0.7.24
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling sha-1 v0.8.2
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling pulldown-cmark-to-cmark v4.0.2
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling notify v4.0.15
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling regex v1.3.6
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling ws v0.9.1
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling mime_guess v1.8.8
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr] error: could not compile `darling_core`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name darling_core /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/darling_core-0.8.6/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -Cembed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' -C metadata=ba3f9155208533ed -C extra-filename=-ba3f9155208533ed --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern fnv=/opt/rustwide/target/debug/deps/libfnv-17f81a650e186a33.rmeta --extern ident_case=/opt/rustwide/target/debug/deps/libident_case-134bae3ecb5135aa.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-e0d6471eaa05250c.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-29ce17c65afe553b.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-f63806fdeb5d12c3.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" "560da848fd828e205db2ad091deb2e2532c22ee1ab23d92eb420362e974924cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "560da848fd828e205db2ad091deb2e2532c22ee1ab23d92eb420362e974924cd", kill_on_drop: false }`
[INFO] [stdout] 560da848fd828e205db2ad091deb2e2532c22ee1ab23d92eb420362e974924cd