[INFO] fetching crate rustproof 0.1.0...
[INFO] documenting rustproof-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate rustproof 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rustproof 0.1.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustproof 0.1.0
[INFO] finished tweaking crates.io crate rustproof 0.1.0
[INFO] tweaked toml for crates.io crate rustproof 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-xid v0.0.2
[INFO] [stderr]   Downloaded regex-syntax v0.2.6
[INFO] [stderr]   Downloaded lalrpop-util v0.11.0
[INFO] [stderr]   Downloaded rustproof-libsmt v0.1.0
[INFO] [stderr]   Downloaded lalrpop-intern v0.11.0
[INFO] [stderr]   Downloaded lalrpop-snap v0.11.0
[INFO] [stderr]   Downloaded petgraph v0.1.18
[INFO] [stderr]   Downloaded itertools v0.3.25
[INFO] [stderr]   Downloaded lalrpop v0.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d088cb82fe6e8ec3d2d88f79f428d2fe551177e676ee42cc7560f80ed4c2dbca
[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" "d088cb82fe6e8ec3d2d88f79f428d2fe551177e676ee42cc7560f80ed4c2dbca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d088cb82fe6e8ec3d2d88f79f428d2fe551177e676ee42cc7560f80ed4c2dbca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d088cb82fe6e8ec3d2d88f79f428d2fe551177e676ee42cc7560f80ed4c2dbca", kill_on_drop: false }`
[INFO] [stdout] d088cb82fe6e8ec3d2d88f79f428d2fe551177e676ee42cc7560f80ed4c2dbca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d39fc8a48f1f3de480e0a076ee53cd4018ab3eed976b3c9726a1417fc33fbe17
[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" "d39fc8a48f1f3de480e0a076ee53cd4018ab3eed976b3c9726a1417fc33fbe17", kill_on_drop: false }`
[INFO] [stderr]     Checking lalrpop-util v0.11.0
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking rustproof-libsmt v0.1.0
[INFO] [stderr]  Documenting rustproof v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]   --> src/lib.rs:28:14
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[macro_use] extern crate syntax;
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `rustproof`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type dylib --crate-name rustproof src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-5bf45ca3abd39eb9.rmeta --extern lalrpop_util=/opt/rustwide/target/debug/deps/liblalrpop_util-8b586585a027a885.rmeta --extern petgraph=/opt/rustwide/target/debug/deps/libpetgraph-745463b6abfde25a.rmeta --extern rustproof_libsmt=/opt/rustwide/target/debug/deps/librustproof_libsmt-ffa25842781eaddb.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "d39fc8a48f1f3de480e0a076ee53cd4018ab3eed976b3c9726a1417fc33fbe17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d39fc8a48f1f3de480e0a076ee53cd4018ab3eed976b3c9726a1417fc33fbe17", kill_on_drop: false }`
[INFO] [stdout] d39fc8a48f1f3de480e0a076ee53cd4018ab3eed976b3c9726a1417fc33fbe17