[INFO] fetching crate mdbook-rss 0.1.0...
[INFO] testing mdbook-rss-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate mdbook-rss 0.1.0 into /workspace/builds/worker-74/source
[INFO] validating manifest of crates.io crate mdbook-rss 0.1.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbook-rss 0.1.0
[INFO] finished tweaking crates.io crate mdbook-rss 0.1.0
[INFO] tweaked toml for crates.io crate mdbook-rss 0.1.0 written to /workspace/builds/worker-74/source/Cargo.toml
[INFO] crate crates.io crate mdbook-rss 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pipeline v0.5.0
[INFO] [stderr]   Downloaded markdown v0.3.0
[INFO] [stderr]   Downloaded diligent-date-parser v0.1.2
[INFO] [stderr]   Downloaded gray_matter v0.1.0
[INFO] [stderr]   Downloaded open v1.5.0
[INFO] [stderr]   Downloaded atom_syndication v0.9.1
[INFO] [stderr]   Downloaded handlebars v3.5.3
[INFO] [stderr]   Downloaded elasticlunr-rs v2.3.10
[INFO] [stderr]   Downloaded rss v1.10.0
[INFO] [stderr]   Downloaded mdbook v0.4.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15994d10a0bca896750fb9b48c7d5818097c0f2c2882295867682575d7e637ae
[INFO] running `Command { std: "docker" "start" "-a" "15994d10a0bca896750fb9b48c7d5818097c0f2c2882295867682575d7e637ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15994d10a0bca896750fb9b48c7d5818097c0f2c2882295867682575d7e637ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15994d10a0bca896750fb9b48c7d5818097c0f2c2882295867682575d7e637ae", kill_on_drop: false }`
[INFO] [stdout] 15994d10a0bca896750fb9b48c7d5818097c0f2c2882295867682575d7e637ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d30d2dd8dc827b8d66fc736b424bf2cf8f1c2761c23ed9c0280752c6d46ce67
[INFO] running `Command { std: "docker" "start" "-a" "7d30d2dd8dc827b8d66fc736b424bf2cf8f1c2761c23ed9c0280752c6d46ce67", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling futures-core v0.3.13
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling futures-sink v0.3.13
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling pin-project-lite v0.2.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling once_cell v1.7.0
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.22
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling pin-project-lite v0.1.11
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling futures-task v0.3.13
[INFO] [stderr]    Compiling byteorder v1.4.2
[INFO] [stderr]    Compiling httparse v1.3.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling cpuid-bool v0.1.2
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling base64 v0.12.3
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling futures-io v0.3.13
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]    Compiling dtoa v0.4.7
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling quick-error v2.0.0
[INFO] [stderr]    Compiling urlencoding v1.1.1
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strum v0.18.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling scoped-tls v1.0.0
[INFO] [stderr]    Compiling pipeline v0.5.0
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling tracing-core v0.1.17
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling bstr v0.2.15
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr] error: could not compile `json`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name json --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/json-0.12.4/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 -C metadata=3ba82227bd791688 -C extra-filename=-3ba82227bd791688 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=warn` (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" "7d30d2dd8dc827b8d66fc736b424bf2cf8f1c2761c23ed9c0280752c6d46ce67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d30d2dd8dc827b8d66fc736b424bf2cf8f1c2761c23ed9c0280752c6d46ce67", kill_on_drop: false }`
[INFO] [stdout] 7d30d2dd8dc827b8d66fc736b424bf2cf8f1c2761c23ed9c0280752c6d46ce67