[INFO] cloning repository https://github.com/blockchain-analysis-study/my-polkadot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/blockchain-analysis-study/my-polkadot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblockchain-analysis-study%2Fmy-polkadot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblockchain-analysis-study%2Fmy-polkadot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f5ec6190c5ba633ac72ef4c7049b9bc2a7b01289
[INFO] testing blockchain-analysis-study/my-polkadot against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fblockchain-analysis-study%2Fmy-polkadot" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/blockchain-analysis-study/my-polkadot on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/blockchain-analysis-study/my-polkadot
[INFO] finished tweaking git repo https://github.com/blockchain-analysis-study/my-polkadot
[INFO] tweaked toml for git repo https://github.com/blockchain-analysis-study/my-polkadot written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/blockchain-analysis-study/my-polkadot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 220e00ec0126949239822ab72e68075f6d3bff7483163684b8b703f58db2ab8a
[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" "220e00ec0126949239822ab72e68075f6d3bff7483163684b8b703f58db2ab8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "220e00ec0126949239822ab72e68075f6d3bff7483163684b8b703f58db2ab8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "220e00ec0126949239822ab72e68075f6d3bff7483163684b8b703f58db2ab8a", kill_on_drop: false }`
[INFO] [stdout] 220e00ec0126949239822ab72e68075f6d3bff7483163684b8b703f58db2ab8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ca652ab9b2004db709553a0b6a14105d022ae39a4ab37abeb2c3ac1d899441e
[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" "4ca652ab9b2004db709553a0b6a14105d022ae39a4ab37abeb2c3ac1d899441e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.13
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling subtle v2.0.0
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]    Compiling arrayref v0.3.5
[INFO] [stderr]    Compiling regex v1.1.5
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]    Compiling constant_time_eq v0.1.3
[INFO] [stderr]    Compiling crunchy v0.2.1
[INFO] [stderr]    Compiling rustc-hex v2.0.1
[INFO] [stderr]    Compiling hash-db v0.12.2
[INFO] [stderr]    Compiling memory_units v0.3.0
[INFO] [stderr]    Compiling static_assertions v0.2.5
[INFO] [stderr]    Compiling base58 v0.1.0
[INFO] [stderr]    Compiling hashmap_core v0.1.10
[INFO] [stderr]    Compiling byte-tools v0.2.0
[INFO] [stderr]    Compiling environmental v1.0.1
[INFO] [stderr]    Compiling integer-sqrt v0.1.2
[INFO] [stderr]    Compiling protobuf v2.4.2
[INFO] [stderr]    Compiling data-encoding v2.1.2
[INFO] [stderr]    Compiling bs58 v0.2.2
[INFO] [stderr]    Compiling zeroize v0.5.2
[INFO] [stderr]    Compiling openssl v0.10.20
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]    Compiling slog v2.4.1
[INFO] [stderr]    Compiling c_linked_list v1.1.1
[INFO] [stderr]    Compiling strum v0.14.0
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling quick-error v0.1.4
[INFO] [stderr]    Compiling nohash-hasher v0.1.1
[INFO] [stderr]    Compiling static_slice v0.0.3
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.1
[INFO] [stderr]    Compiling parity-bytes v0.1.0 (https://github.com/paritytech/parity-common?rev=b0317f649ab2c665b7987b8475878fc4d2e1f81d#b0317f64)
[INFO] [stderr]    Compiling bitmask v0.5.0
[INFO] [stderr]    Compiling bindgen v0.47.3
[INFO] [stderr]    Compiling interleaved-ordered v0.1.1
[INFO] [stderr]    Compiling parity-bytes v0.1.0 (https://github.com/paritytech/parity-common?rev=616b40150ded71f57f650067fcbc5c99d7c343e6#616b4015)
[INFO] [stderr]    Compiling target_info v0.1.0
[INFO] [stderr]    Compiling bitvec v0.8.0
[INFO] [stderr]    Compiling names v0.11.0
[INFO] [stderr]    Compiling sysinfo v0.8.2
[INFO] [stderr]    Compiling slice-group-by v0.2.4
[INFO] [stderr]    Compiling syn v0.15.33
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling tokio-sync v0.1.4
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling unicase v2.3.0
[INFO] [stderr]    Compiling trie-root v0.12.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling clang-sys v0.26.4
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling app_dirs v1.2.1
[INFO] [stderr]    Compiling want v0.0.6
[INFO] [stderr]    Compiling tokio-executor v0.1.7
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling sr-std v1.0.0 (https://github.com/paritytech/substrate?branch=polkadot-master#14bc1b40)
[INFO] [stderr]    Compiling sr-io v1.0.0 (https://github.com/paritytech/substrate?branch=polkadot-master#14bc1b40)
[INFO] [stderr]    Compiling snow v0.5.2
[INFO] [stderr]    Compiling safe-mix v1.0.0
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling proc-macro-hack v0.4.1
[INFO] [stderr]    Compiling tokio-timer v0.2.10
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling tiny-keccak v1.4.2
[INFO] [stderr]    Compiling hash256-std-hasher v0.12.2
[INFO] [stderr]    Compiling elastic-array v0.10.2
[INFO] [stderr]    Compiling memory-db v0.12.2
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]    Compiling parity-wasm v0.31.3
[INFO] [stderr]    Compiling uint v0.6.1
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling dns-parser v0.8.0
[INFO] [stderr]    Compiling bigint v4.4.1
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling get_if_addrs v0.5.3
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling fs-swap v0.2.4
[INFO] [stderr]    Compiling fdlimit v0.1.1
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling hex-literal-impl v0.1.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling blake2-rfc v0.2.18
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling generic-array v0.8.3
[INFO] [stderr]    Compiling kvdb v0.1.0 (https://github.com/paritytech/parity-common?rev=b0317f649ab2c665b7987b8475878fc4d2e1f81d#b0317f64)
[INFO] [stderr]    Compiling kvdb v0.1.0 (https://github.com/paritytech/parity-common?rev=616b40150ded71f57f650067fcbc5c99d7c343e6#616b4015)
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling cexpr v0.3.5
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling hyper v0.10.15
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.0
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling block-cipher-trait v0.6.2
[INFO] [stderr]    Compiling stream-cipher v0.3.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling digest v0.6.2
[INFO] [stderr]    Compiling crypto-mac v0.4.0
[INFO] [stderr]    Compiling block-buffer v0.2.0
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling fixed-hash v0.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling hex-literal v0.1.4
[INFO] [stderr]    Compiling wasmi v0.4.4
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling http v0.1.16
[INFO] [stderr]    Compiling cuckoofilter v0.3.2
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling parking_lot v0.5.5
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling sha3 v0.8.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling twox-hash v1.2.0
[INFO] [stderr]    Compiling trie-db v0.12.2
[INFO] [stderr]    Compiling hmac v0.7.0
[INFO] [stderr]    Compiling blake2 v0.8.0
[INFO] [stderr]    Compiling aes-soft v0.3.3
[INFO] [stderr]    Compiling twofish v0.2.0
[INFO] [stderr]    Compiling ctr v0.3.2
[INFO] [stderr]    Compiling hmac v0.4.2
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling sha2 v0.6.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.13
[INFO] [stderr]    Compiling vergen v3.0.4
[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-0.15.33/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=7e9599c516f4a81e -C extra-filename=-7e9599c516f4a81e --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-baee35fcf6990606.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-231298ba45d3a76e.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-2f6444d33d391550.rmeta --cap-lints allow --cap-lints=warn --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" "4ca652ab9b2004db709553a0b6a14105d022ae39a4ab37abeb2c3ac1d899441e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ca652ab9b2004db709553a0b6a14105d022ae39a4ab37abeb2c3ac1d899441e", kill_on_drop: false }`
[INFO] [stdout] 4ca652ab9b2004db709553a0b6a14105d022ae39a4ab37abeb2c3ac1d899441e