[INFO] cloning repository https://github.com/0verwritten/explainer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0verwritten/explainer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0verwritten%2Fexplainer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0verwritten%2Fexplainer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b68b8517484f23a3f9cecc2428fd3d9428dc613
[INFO] checking 0verwritten/explainer against master#1be5c8f90912c446ecbdc405cbc4a89f9acd20fd for pr-93394
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0verwritten%2Fexplainer" "/workspace/builds/worker-70/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-70/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/0verwritten/explainer on toolchain 1be5c8f90912c446ecbdc405cbc4a89f9acd20fd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/0verwritten/explainer
[INFO] finished tweaking git repo https://github.com/0verwritten/explainer
[INFO] tweaked toml for git repo https://github.com/0verwritten/explainer written to /workspace/builds/worker-70/source/Cargo.toml
[INFO] crate git repo https://github.com/0verwritten/explainer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "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-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c79bece6c87c24faa72c9d84c126328b9cf44344cc72c1b8457943b6550bf01
[INFO] running `Command { std: "docker" "start" "-a" "5c79bece6c87c24faa72c9d84c126328b9cf44344cc72c1b8457943b6550bf01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c79bece6c87c24faa72c9d84c126328b9cf44344cc72c1b8457943b6550bf01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c79bece6c87c24faa72c9d84c126328b9cf44344cc72c1b8457943b6550bf01", kill_on_drop: false }`
[INFO] [stdout] 5c79bece6c87c24faa72c9d84c126328b9cf44344cc72c1b8457943b6550bf01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1be5c8f90912c446ecbdc405cbc4a89f9acd20fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1075109e88e622c77cadc4fbb7230cb1fc3108a19a91fe0c7d2cc4182f412762
[INFO] running `Command { std: "docker" "start" "-a" "1075109e88e622c77cadc4fbb7230cb1fc3108a19a91fe0c7d2cc4182f412762", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling openssl v0.10.35
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]     Checking try-lock v0.2.3
[INFO] [stderr]     Checking openssl-probe v0.1.4
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking httpdate v1.0.1
[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking ipnet v2.3.1
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling openssl-sys v0.9.65
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking tracing-core v0.1.18
[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 encoding_rs v0.8.28
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking ryu v1.0.5
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking socket2 v0.4.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]     Checking tracing v0.1.26
[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,artifacts,future-incompat --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' -C metadata=a09e21bb05aaf65e -C extra-filename=-a09e21bb05aaf65e --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-2b187afb25f696e1.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-1b89975272fbbc51.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-9325f8181c613737.rlib --extern proc_macro --cap-lints allow --cap-lints=warn --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" "1075109e88e622c77cadc4fbb7230cb1fc3108a19a91fe0c7d2cc4182f412762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1075109e88e622c77cadc4fbb7230cb1fc3108a19a91fe0c7d2cc4182f412762", kill_on_drop: false }`
[INFO] [stdout] 1075109e88e622c77cadc4fbb7230cb1fc3108a19a91fe0c7d2cc4182f412762