[INFO] fetching crate mdbook-epub 0.3.0...
[INFO] building mdbook-epub-0.3.0 against master#ff34b919075f35a1787659e9c448a34b06bab8de for issue-85264
[INFO] extracting crate mdbook-epub 0.3.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate mdbook-epub 0.3.0 on toolchain ff34b919075f35a1787659e9c448a34b06bab8de
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbook-epub 0.3.0
[INFO] finished tweaking crates.io crate mdbook-epub 0.3.0
[INFO] tweaked toml for crates.io crate mdbook-epub 0.3.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate mdbook-epub 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "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] 6d6b05136c0709553f9564ea61ae82863b4fd30314efa6dc1e9d5b2025752158
[INFO] running `Command { std: "docker" "start" "-a" "6d6b05136c0709553f9564ea61ae82863b4fd30314efa6dc1e9d5b2025752158", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d6b05136c0709553f9564ea61ae82863b4fd30314efa6dc1e9d5b2025752158", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d6b05136c0709553f9564ea61ae82863b4fd30314efa6dc1e9d5b2025752158", kill_on_drop: false }`
[INFO] [stdout] 6d6b05136c0709553f9564ea61ae82863b4fd30314efa6dc1e9d5b2025752158
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "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] 1811b3dd07da9e969337681a01171150237bf8f13a9e983ab27fb7e46b41e0f2
[INFO] running `Command { std: "docker" "start" "-a" "1811b3dd07da9e969337681a01171150237bf8f13a9e983ab27fb7e46b41e0f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.61
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling regex-syntax v0.6.11
[INFO] [stderr]    Compiling safemem v0.3.1
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling adler32 v1.0.3
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling unicase v2.4.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling pest v2.1.1
[INFO] [stderr]    Compiling block-padding v0.1.4
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling getopts v0.2.19
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling humantime v1.2.0
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling unicode-normalization v0.1.8
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling libflate v0.1.26
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling pulldown-cmark v0.5.3
[INFO] [stderr]    Compiling mime v0.3.13
[INFO] [stderr]    Compiling pest_meta v2.1.1
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling getrandom v0.1.8
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling filetime v0.2.5
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling backtrace v0.3.34
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling inotify v0.6.1
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling regex v1.2.1
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling zip v0.5.2
[INFO] [stderr]    Compiling sha-1 v0.8.1
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling chrono v0.4.7
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling ws v0.8.1
[INFO] [stderr]    Compiling notify v4.0.12
[INFO] [stderr]    Compiling mime_guess v1.8.7
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.44/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 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=683f2c0f862b3d45 -C extra-filename=-683f2c0f862b3d45 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-50111b8f7188482d.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-4972d66cc4bf7970.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-a81338cd23b23cba.rmeta --cap-lints allow --cap-lints=forbid --cfg syn_can_match_trailing_dollar --cfg syn_can_use_thread_id --cfg syn_can_use_associated_constants --cfg syn_can_call_macro_by_path` (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" "1811b3dd07da9e969337681a01171150237bf8f13a9e983ab27fb7e46b41e0f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1811b3dd07da9e969337681a01171150237bf8f13a9e983ab27fb7e46b41e0f2", kill_on_drop: false }`
[INFO] [stdout] 1811b3dd07da9e969337681a01171150237bf8f13a9e983ab27fb7e46b41e0f2
