[INFO] fetching crate exonum-configuration 0.12.0...
[INFO] testing exonum-configuration-0.12.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate exonum-configuration 0.12.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate exonum-configuration 0.12.0 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 exonum-configuration 0.12.0
[INFO] finished tweaking crates.io crate exonum-configuration 0.12.0
[INFO] tweaked toml for crates.io crate exonum-configuration 0.12.0 written to /workspace/builds/worker-12/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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded exonum-build v0.12.0
[INFO] [stderr]   Downloaded exonum-crypto v0.12.0
[INFO] [stderr]   Downloaded exonum-derive v0.12.0
[INFO] [stderr]   Downloaded exonum-testkit v0.12.0
[INFO] [stderr]   Downloaded exonum_libsodium-sys v0.0.22
[INFO] [stderr]   Downloaded exonum-merkledb v0.12.0
[INFO] [stderr]   Downloaded exonum v0.12.2
[INFO] [stderr]   Downloaded exonum_sodiumoxide v0.0.22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 1998bba12acde20f05133ebd9510e5a94fc771e62bc9db2dce0b9325fa2cb6db
[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" "1998bba12acde20f05133ebd9510e5a94fc771e62bc9db2dce0b9325fa2cb6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1998bba12acde20f05133ebd9510e5a94fc771e62bc9db2dce0b9325fa2cb6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1998bba12acde20f05133ebd9510e5a94fc771e62bc9db2dce0b9325fa2cb6db", kill_on_drop: false }`
[INFO] [stdout] 1998bba12acde20f05133ebd9510e5a94fc771e62bc9db2dce0b9325fa2cb6db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] dc40f6b03671f12ddce108d617e5b72734c29dd9cb75f2beff417de5468b256a
[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" "dc40f6b03671f12ddce108d617e5b72734c29dd9cb75f2beff417de5468b256a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling protobuf v2.18.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling v_htmlescape v0.4.5
[INFO] [stderr]    Compiling os_info v1.3.3
[INFO] [stderr]    Compiling leb128 v0.2.4
[INFO] [stderr]    Compiling tower-service v0.1.0
[INFO] [stderr]    Compiling actix-web v0.7.19
[INFO] [stderr]    Compiling snow v0.6.2
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling v_escape_derive v0.5.6
[INFO] [stderr]    Compiling exonum-derive v0.12.0
[INFO] [stderr]    Compiling enum-primitive-derive v0.1.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling hex-buffer-serde v0.2.2
[INFO] [stderr]    Compiling rust_decimal v1.9.0
[INFO] [stderr]    Compiling bincode v1.3.1
[INFO] [stderr]    Compiling erased-serde v0.3.13
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling v_escape v0.7.4
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling backtrace v0.3.55
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling filetime v0.2.13
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling hostname v0.3.1
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling rpassword v4.0.5
[INFO] [stderr]    Compiling which v4.0.2
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling tar v0.4.30
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling cookie v0.11.3
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling resolv-conf v0.6.3
[INFO] [stderr]    Compiling protoc v2.18.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling http v0.1.21
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling tokio-retry v0.2.0
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling rand v0.7.3
[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-sys v0.1.9+1.0.8
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling clear_on_drop v0.2.4
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio-signal v0.2.9
[INFO] [stderr]    Compiling trust-dns-proto v0.6.3
[INFO] [stderr]    Compiling trust-dns-proto v0.5.0
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling protobuf-codegen v2.18.1
[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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=8e3d184cbe27d5eb -C extra-filename=-8e3d184cbe27d5eb --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-49e6735de3682b48.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-6d50a8ec5fa94fcb.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-3d4e94452878465a.rmeta --cap-lints allow --cap-lints=warn --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 --cfg syn_disable_nightly_tests` (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" "dc40f6b03671f12ddce108d617e5b72734c29dd9cb75f2beff417de5468b256a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc40f6b03671f12ddce108d617e5b72734c29dd9cb75f2beff417de5468b256a", kill_on_drop: false }`
[INFO] [stdout] dc40f6b03671f12ddce108d617e5b72734c29dd9cb75f2beff417de5468b256a