[INFO] fetching crate alef 0.0.1-alpha...
[INFO] documenting alef-0.0.1-alpha against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate alef 0.0.1-alpha into /workspace/builds/worker-47/source
[INFO] validating manifest of crates.io crate alef 0.0.1-alpha on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alef 0.0.1-alpha
[INFO] finished tweaking crates.io crate alef 0.0.1-alpha
[INFO] tweaked toml for crates.io crate alef 0.0.1-alpha written to /workspace/builds/worker-47/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17aa7b004e4000cda28e540dad96d413b227b5fb1b431136175818452c5837a5
[INFO] running `Command { std: "docker" "start" "-a" "17aa7b004e4000cda28e540dad96d413b227b5fb1b431136175818452c5837a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17aa7b004e4000cda28e540dad96d413b227b5fb1b431136175818452c5837a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17aa7b004e4000cda28e540dad96d413b227b5fb1b431136175818452c5837a5", kill_on_drop: false }`
[INFO] [stdout] 17aa7b004e4000cda28e540dad96d413b227b5fb1b431136175818452c5837a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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" "RUSTDOCFLAGS=--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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f41f9b819d016966b36e08c49f4b1452a506c4e5dedd076ee6567b624978aba
[INFO] running `Command { std: "docker" "start" "-a" "1f41f9b819d016966b36e08c49f4b1452a506c4e5dedd076ee6567b624978aba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling siphasher v0.3.6
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking if_chain v1.0.1
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]     Checking retain_mut v0.1.1
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]     Checking unicode-bidi v0.3.5
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking ordered-float v1.1.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling swc_atoms v0.2.6
[INFO] [stderr]    Compiling pmutil v0.5.3
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling swc_macros_common v0.3.3
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling swc_visit_macros v0.2.3
[INFO] [stderr]    Compiling swc_eq_ignore_macros v0.1.0
[INFO] [stderr]    Compiling from_variant v0.1.3
[INFO] [stderr]    Compiling string_enum v0.3.1
[INFO] [stderr]    Compiling is-macro v0.1.9
[INFO] [stderr]    Compiling enum_kind v0.2.1
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling swc_ecma_codegen_macros v0.5.2
[INFO] [stderr]    Compiling swc_ecma_transforms_macros v0.1.2
[INFO] [stderr] error: could not compile `serde_derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde_derive /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_derive-1.0.127/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' -C metadata=ed05fb43e6604da8 -C extra-filename=-ed05fb43e6604da8 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-4ad853a01b52ac03.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-8388bbcd500a3679.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-3c2337018133fb1e.rlib --extern proc_macro --cap-lints allow --cfg underscore_consts` (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" "1f41f9b819d016966b36e08c49f4b1452a506c4e5dedd076ee6567b624978aba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f41f9b819d016966b36e08c49f4b1452a506c4e5dedd076ee6567b624978aba", kill_on_drop: false }`
[INFO] [stdout] 1f41f9b819d016966b36e08c49f4b1452a506c4e5dedd076ee6567b624978aba
