[INFO] fetching crate mdbook-nix-eval 1.0.1...
[INFO] testing mdbook-nix-eval-1.0.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mdbook-nix-eval 1.0.1 into /workspace/builds/worker-51/source
[INFO] validating manifest of crates.io crate mdbook-nix-eval 1.0.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbook-nix-eval 1.0.1
[INFO] finished tweaking crates.io crate mdbook-nix-eval 1.0.1
[INFO] tweaked toml for crates.io crate mdbook-nix-eval 1.0.1 written to /workspace/builds/worker-51/source/Cargo.toml
[INFO] crate crates.io crate mdbook-nix-eval 1.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8025a0cc1e28196b369bb868e803ba736c15523eaf6260d10b9c80e77360d4c7
[INFO] running `Command { std: "docker" "start" "-a" "8025a0cc1e28196b369bb868e803ba736c15523eaf6260d10b9c80e77360d4c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8025a0cc1e28196b369bb868e803ba736c15523eaf6260d10b9c80e77360d4c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8025a0cc1e28196b369bb868e803ba736c15523eaf6260d10b9c80e77360d4c7", kill_on_drop: false }`
[INFO] [stdout] 8025a0cc1e28196b369bb868e803ba736c15523eaf6260d10b9c80e77360d4c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e42f238b2b1f4efc8cadd585ffa447f9accce9e5aea87faa05250773ef63ea62
[INFO] running `Command { std: "docker" "start" "-a" "e42f238b2b1f4efc8cadd585ffa447f9accce9e5aea87faa05250773ef63ea62", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.61
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling utf-8 v0.7.5
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling futures-core v0.3.13
[INFO] [stderr]    Compiling futures-sink v0.3.13
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling futures-task v0.3.13
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling httparse v1.3.5
[INFO] [stderr]    Compiling pin-project-lite v0.1.12
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling cpuid-bool v0.1.2
[INFO] [stderr]    Compiling byteorder v1.4.2
[INFO] [stderr]    Compiling regex-syntax v0.6.22
[INFO] [stderr]    Compiling base64 v0.12.3
[INFO] [stderr]    Compiling dtoa v0.4.7
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling futures-io v0.3.13
[INFO] [stderr]    Compiling quick-error v2.0.0
[INFO] [stderr]    Compiling urlencoding v1.1.1
[INFO] [stderr]    Compiling strum v0.18.0
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling tinyvec v1.1.1
[INFO] [stderr]    Compiling http v0.2.3
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling tracing-core v0.1.17
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling gitignore v1.0.7
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling input_buffer v0.3.1
[INFO] [stderr] error: could not compile `http`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name http --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/http-0.2.3/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=63929694be68f5cc -C extra-filename=-63929694be68f5cc --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-e6eec5aeecffa8a4.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-d1dc8bedb5ffcb44.rmeta --extern itoa=/opt/rustwide/target/debug/deps/libitoa-90f9d50dc2d49c87.rmeta --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" "e42f238b2b1f4efc8cadd585ffa447f9accce9e5aea87faa05250773ef63ea62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e42f238b2b1f4efc8cadd585ffa447f9accce9e5aea87faa05250773ef63ea62", kill_on_drop: false }`
[INFO] [stdout] e42f238b2b1f4efc8cadd585ffa447f9accce9e5aea87faa05250773ef63ea62