[INFO] fetching crate sitegen 0.0.1...
[INFO] checking sitegen-0.0.1 against master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] extracting crate sitegen 0.0.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate sitegen 0.0.1 on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sitegen 0.0.1
[INFO] finished tweaking crates.io crate sitegen 0.0.1
[INFO] tweaked toml for crates.io crate sitegen 0.0.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "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" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48706fd07ca2b9bed491aba166ad0a54789123db521d6b2ee0dd25214937eb4c
[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" "48706fd07ca2b9bed491aba166ad0a54789123db521d6b2ee0dd25214937eb4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48706fd07ca2b9bed491aba166ad0a54789123db521d6b2ee0dd25214937eb4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48706fd07ca2b9bed491aba166ad0a54789123db521d6b2ee0dd25214937eb4c", kill_on_drop: false }`
[INFO] [stdout] 48706fd07ca2b9bed491aba166ad0a54789123db521d6b2ee0dd25214937eb4c
[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=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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d552538fdde6cb0af31894f8e17a5cdfc3c46b5a9f36ef94e1d033618d7e814
[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" "4d552538fdde6cb0af31894f8e17a5cdfc3c46b5a9f36ef94e1d033618d7e814", kill_on_drop: false }`
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking fs_extra v1.2.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]     Checking hashbrown v0.5.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]    Compiling sass-sys v0.4.21
[INFO] [stderr]     Checking backtrace v0.3.54
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr] error: could not compile `serde_json`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde_json --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.59/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="default"' --cfg 'feature="std"' -C metadata=f2731fa1e48f038d -C extra-filename=-f2731fa1e48f038d --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern itoa=/opt/rustwide/target/debug/deps/libitoa-97674b681340410c.rmeta --extern ryu=/opt/rustwide/target/debug/deps/libryu-7fc3bd00955fd0e8.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-b6a9c3e5854a7bf0.rmeta --cap-lints allow --cap-lints=forbid --cfg limb_width_64` (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" "4d552538fdde6cb0af31894f8e17a5cdfc3c46b5a9f36ef94e1d033618d7e814", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d552538fdde6cb0af31894f8e17a5cdfc3c46b5a9f36ef94e1d033618d7e814", kill_on_drop: false }`
[INFO] [stdout] 4d552538fdde6cb0af31894f8e17a5cdfc3c46b5a9f36ef94e1d033618d7e814