[INFO] crate salmon 0.5.0 is already in cache
[INFO] documenting salmon-0.5.0 against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] extracting crate salmon 0.5.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate salmon 0.5.0 on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate salmon 0.5.0
[INFO] finished tweaking crates.io crate salmon 0.5.0
[INFO] tweaked toml for crates.io crate salmon 0.5.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "fetch" "--locked" "--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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae1bf1bfd5320a3f1da6dbfb6fb808a12dc7aa150e9ed597a5654389c5e8d0c5
[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" "ae1bf1bfd5320a3f1da6dbfb6fb808a12dc7aa150e9ed597a5654389c5e8d0c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae1bf1bfd5320a3f1da6dbfb6fb808a12dc7aa150e9ed597a5654389c5e8d0c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae1bf1bfd5320a3f1da6dbfb6fb808a12dc7aa150e9ed597a5654389c5e8d0c5", kill_on_drop: false }`
[INFO] [stdout] ae1bf1bfd5320a3f1da6dbfb6fb808a12dc7aa150e9ed597a5654389c5e8d0c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 458898d08e504fccb02b562e9195e3aeb529c3ff3b3819f58f56a927e3fde977
[INFO] running `Command { std: "docker" "start" "-a" "458898d08e504fccb02b562e9195e3aeb529c3ff3b3819f58f56a927e3fde977", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling bindgen v0.53.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking dtoa v0.4.6
[INFO] [stderr]    Compiling procedural-masquerade v0.1.7
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking thin-slice v0.1.1
[INFO] [stderr]     Checking xml-rs v0.8.3
[INFO] [stderr]    Compiling pulldown-cmark v0.5.3
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ego-tree v0.6.2
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking phf_shared v0.7.24
[INFO] [stderr]     Checking dtoa-short v0.3.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]     Checking backtrace v0.3.49
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling cssparser v0.25.9
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking flate2 v1.0.16
[INFO] [stderr]    Compiling sass-sys v0.4.21
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr] error: could not compile `synstructure`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name synstructure --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/synstructure-0.12.4/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -Cembed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="proc-macro"' -C metadata=511c0e6126d37fff -C extra-filename=-511c0e6126d37fff --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-fd0b09dcd38b7a95.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-04c966add0898921.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-b083342c40ee1427.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-460f9c27fbb1b178.rmeta --cap-lints allow` (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" "458898d08e504fccb02b562e9195e3aeb529c3ff3b3819f58f56a927e3fde977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "458898d08e504fccb02b562e9195e3aeb529c3ff3b3819f58f56a927e3fde977", kill_on_drop: false }`
[INFO] [stdout] 458898d08e504fccb02b562e9195e3aeb529c3ff3b3819f58f56a927e3fde977