[INFO] cloning repository https://github.com/QingchenDang/twemcache
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/QingchenDang/twemcache" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQingchenDang%2Ftwemcache", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQingchenDang%2Ftwemcache'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0b9194ad9665b9696fe60a5e65ed33a9671d7336
[INFO] documenting QingchenDang/twemcache against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FQingchenDang%2Ftwemcache" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/QingchenDang/twemcache on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/QingchenDang/twemcache
[INFO] finished tweaking git repo https://github.com/QingchenDang/twemcache
[INFO] tweaked toml for git repo https://github.com/QingchenDang/twemcache written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/QingchenDang/twemcache already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/twitter/rustcommon`
[INFO] [stderr]     Updating git repository `https://github.com/swlynch99/httpencode`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded boring v1.0.3
[INFO] [stderr]   Downloaded boring-sys v1.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b38082b11e11c266700a81f8af45abed3fea25aa06094298315fe19ef8b1ab0
[INFO] running `Command { std: "docker" "start" "-a" "6b38082b11e11c266700a81f8af45abed3fea25aa06094298315fe19ef8b1ab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b38082b11e11c266700a81f8af45abed3fea25aa06094298315fe19ef8b1ab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b38082b11e11c266700a81f8af45abed3fea25aa06094298315fe19ef8b1ab0", kill_on_drop: false }`
[INFO] [stdout] 6b38082b11e11c266700a81f8af45abed3fea25aa06094298315fe19ef8b1ab0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTDOCFLAGS=--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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 66fbff6ca0b04a660360945387e15a7aa7dd18e7aed29261c8239bb4f05d1e90
[INFO] running `Command { std: "docker" "start" "-a" "66fbff6ca0b04a660360945387e15a7aa7dd18e7aed29261c8239bb4f05d1e90", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.84
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling bindgen v0.53.3
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]     Checking strum v0.20.0
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling ccommon-rs v0.1.0 (/opt/rustwide/workdir/deps/ccommon/rust/ccommon-rs)
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]     Checking addr2line v0.14.0
[INFO] [stderr]     Checking rustcommon-buffer v0.2.0 (https://github.com/twitter/rustcommon#2d70e44f)
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]     Checking httpencode v0.1.0 (https://github.com/swlynch99/httpencode#54e1dca7)
[INFO] [stderr]     Checking httpencode v0.1.0 (/opt/rustwide/workdir/src/rust-util/httpencode)
[INFO] [stderr]  Documenting httpencode v0.1.0 (/opt/rustwide/workdir/src/rust-util/httpencode)
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]  Documenting check_twemcache_http v0.1.0 (/opt/rustwide/workdir/test/server/twemcache-http)
[INFO] [stderr]    Compiling boring-sys v1.0.2
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking signal-hook-registry v1.2.2
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking mio v0.7.5
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]    Compiling clang-sys v0.29.3
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking rustcommon-logger v1.0.0 (https://github.com/twitter/rustcommon#2d70e44f)
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking backtrace v0.3.54
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-1.0.48/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="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=eea5f78a7d0f48f6 -C extra-filename=-eea5f78a7d0f48f6 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-33a4ad259574b86e.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-4eb75dae3a1b6a1f.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-277886716531362e.rmeta --cap-lints allow --cfg syn_disable_nightly_tests` (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" "66fbff6ca0b04a660360945387e15a7aa7dd18e7aed29261c8239bb4f05d1e90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66fbff6ca0b04a660360945387e15a7aa7dd18e7aed29261c8239bb4f05d1e90", kill_on_drop: false }`
[INFO] [stdout] 66fbff6ca0b04a660360945387e15a7aa7dd18e7aed29261c8239bb4f05d1e90
