[INFO] fetching crate sc-consensus-babe 0.9.0...
[INFO] checking sc-consensus-babe-0.9.0 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate sc-consensus-babe 0.9.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate sc-consensus-babe 0.9.0 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sc-consensus-babe 0.9.0
[INFO] finished tweaking crates.io crate sc-consensus-babe 0.9.0
[INFO] tweaked toml for crates.io crate sc-consensus-babe 0.9.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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] 639302d0f7c995b3c1bb89d762c2e5323e2bdb890d77475a16ba0e3e2441c245
[INFO] running `Command { std: "docker" "start" "-a" "639302d0f7c995b3c1bb89d762c2e5323e2bdb890d77475a16ba0e3e2441c245", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "639302d0f7c995b3c1bb89d762c2e5323e2bdb890d77475a16ba0e3e2441c245", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "639302d0f7c995b3c1bb89d762c2e5323e2bdb890d77475a16ba0e3e2441c245", kill_on_drop: false }`
[INFO] [stdout] 639302d0f7c995b3c1bb89d762c2e5323e2bdb890d77475a16ba0e3e2441c245
[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" "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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5da3a3d9e3ef0f69ba2eac77d96e65f97fbef9d73591c5aaff073904d3ce6e4
[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" "e5da3a3d9e3ef0f69ba2eac77d96e65f97fbef9d73591c5aaff073904d3ce6e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling parity-util-mem v0.9.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking unsigned-varint v0.7.0
[INFO] [stderr]     Checking uint v0.9.0
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]    Compiling dyn-clonable-impl v0.9.0
[INFO] [stderr]    Compiling derive_more v0.99.13
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling pin-project-internal v0.4.28
[INFO] [stderr]    Compiling asn1_der_derive v0.1.2
[INFO] [stderr]    Compiling libp2p-core-derive v0.21.0
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.6
[INFO] [stderr]     Checking serde v1.0.125
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking ref-cast v1.0.6
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]    Compiling prost v0.7.0
[INFO] [stderr]     Checking sha2 v0.9.4
[INFO] [stderr]     Checking sha-1 v0.9.5
[INFO] [stderr]     Checking pbkdf2 v0.4.0
[INFO] [stderr]     Checking hmac v0.8.1
[INFO] [stderr]     Checking zeroize v1.3.0
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking libsecp256k1 v0.3.5
[INFO] [stderr]     Checking curve25519-dalek v3.1.0
[INFO] [stderr]     Checking curve25519-dalek v2.1.2
[INFO] [stderr]     Checking merlin v2.0.1
[INFO] [stderr]     Checking secrecy v0.7.0
[INFO] [stderr]     Checking tiny-bip39 v0.8.0
[INFO] [stderr]    Compiling prost-types v0.7.0
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]     Checking trie-db v0.22.3
[INFO] [stderr]     Checking polling v2.0.3
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.73
[INFO] [stderr]     Checking dyn-clonable v0.9.0
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking asn1_der v0.6.3
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]    Compiling backtrace v0.3.59
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling prost-build v0.7.0
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr] error: could not compile `serde`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.125/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="serde_derive"' --cfg 'feature="std"' -C metadata=1509640d22350309 -C extra-filename=-1509640d22350309 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-bd23713e0ad03ab5.so --cap-lints allow --cap-lints=forbid --cfg ops_bound --cfg core_reverse --cfg de_boxed_c_str --cfg de_boxed_path --cfg de_rc_dst --cfg core_duration --cfg integer128 --cfg range_inclusive --cfg num_nonzero --cfg serde_derive --cfg core_try_from --cfg num_nonzero_signed --cfg systemtime_checked_add --cfg std_atomic64 --cfg std_atomic` (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" "e5da3a3d9e3ef0f69ba2eac77d96e65f97fbef9d73591c5aaff073904d3ce6e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5da3a3d9e3ef0f69ba2eac77d96e65f97fbef9d73591c5aaff073904d3ce6e4", kill_on_drop: false }`
[INFO] [stdout] e5da3a3d9e3ef0f69ba2eac77d96e65f97fbef9d73591c5aaff073904d3ce6e4