[INFO] cloning repository https://github.com/mpcowan/cram
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mpcowan/cram" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpcowan%2Fcram", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpcowan%2Fcram'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a285f469ea298bbf6f482f6a0d84ef789b5260e4
[INFO] documenting mpcowan/cram against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpcowan%2Fcram" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mpcowan/cram on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mpcowan/cram
[INFO] finished tweaking git repo https://github.com/mpcowan/cram
[INFO] tweaked toml for git repo https://github.com/mpcowan/cram written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/mpcowan/cram already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `0.11.1+zstd.1.5.2` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[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-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 19b7ef1b007955dc9b5de306f50e9f27349189a0f82b730e59881df1bee2b041
[INFO] running `Command { std: "docker" "start" "-a" "19b7ef1b007955dc9b5de306f50e9f27349189a0f82b730e59881df1bee2b041", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19b7ef1b007955dc9b5de306f50e9f27349189a0f82b730e59881df1bee2b041", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19b7ef1b007955dc9b5de306f50e9f27349189a0f82b730e59881df1bee2b041", kill_on_drop: false }`
[INFO] [stdout] 19b7ef1b007955dc9b5de306f50e9f27349189a0f82b730e59881df1bee2b041
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8eda9c85d7613b1bc694d982e5f0b8e000b495d5c46d52750938d2f37e6bf542
[INFO] running `Command { std: "docker" "start" "-a" "8eda9c85d7613b1bc694d982e5f0b8e000b495d5c46d52750938d2f37e6bf542", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `0.11.1+zstd.1.5.2` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling zstd-safe v5.0.1+zstd.1.5.2
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.3
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]    Compiling snap v1.0.5
[INFO] [stderr]     Checking rle-decode-fast v1.0.3
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking twox-hash v1.6.2
[INFO] [stderr]     Checking libflate_lz77 v1.1.0
[INFO] [stderr]     Checking alloc-stdlib v0.2.1
[INFO] [stderr]     Checking brotli-decompressor v2.3.2
[INFO] [stderr]     Checking lz4_flex v0.9.2
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking libflate v1.2.0
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking console v0.15.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking brotli v3.3.4
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]    Compiling zstd-sys v2.0.1+zstd.1.5.2
[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-1.0.91/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=4b76648d1f5bc705 -C extra-filename=-4b76648d1f5bc705 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-bb2897dcb479b629.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-6e47dd3f693995db.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-11d097b41f2e60a4.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] running `Command { std: "docker" "inspect" "8eda9c85d7613b1bc694d982e5f0b8e000b495d5c46d52750938d2f37e6bf542", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eda9c85d7613b1bc694d982e5f0b8e000b495d5c46d52750938d2f37e6bf542", kill_on_drop: false }`
[INFO] [stdout] 8eda9c85d7613b1bc694d982e5f0b8e000b495d5c46d52750938d2f37e6bf542