[INFO] fetching crate rustlex_codegen 0.4.0...
[INFO] documenting rustlex_codegen-0.4.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate rustlex_codegen 0.4.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate rustlex_codegen 0.4.0 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 rustlex_codegen 0.4.0
[INFO] finished tweaking crates.io crate rustlex_codegen 0.4.0
[INFO] tweaked toml for crates.io crate rustlex_codegen 0.4.0 written to /workspace/builds/worker-2/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 rustlex_fsa v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] a0cb8203dae1a16ac83abc75484559b52f85e253e0d857597388d66917f4dc8e
[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" "a0cb8203dae1a16ac83abc75484559b52f85e253e0d857597388d66917f4dc8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0cb8203dae1a16ac83abc75484559b52f85e253e0d857597388d66917f4dc8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0cb8203dae1a16ac83abc75484559b52f85e253e0d857597388d66917f4dc8e", kill_on_drop: false }`
[INFO] [stdout] a0cb8203dae1a16ac83abc75484559b52f85e253e0d857597388d66917f4dc8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 380939d9e64c0e31672c7ddd0ea056a2ec9fd5d0ed3dbb5ea218c9bf8b7a5430
[INFO] running `Command { std: "docker" "start" "-a" "380939d9e64c0e31672c7ddd0ea056a2ec9fd5d0ed3dbb5ea218c9bf8b7a5430", kill_on_drop: false }`
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]     Checking rustlex_fsa v0.4.0
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]  Documenting rustlex_codegen v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> lib.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(plugin_registrar,rustc_private,quote)]
[INFO] [stdout]   |                                           ^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]  --> lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate syntax;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0463, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `rustlex_codegen`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name rustlex_codegen 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 bit_set=/opt/rustwide/target/debug/deps/libbit_set-41c3436ce2f1ff15.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-39376325fae1b39f.rmeta --extern fsa=/opt/rustwide/target/debug/deps/libfsa-30f3b1bacbf89089.rmeta --cap-lints=warn --crate-version 0.4.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "380939d9e64c0e31672c7ddd0ea056a2ec9fd5d0ed3dbb5ea218c9bf8b7a5430", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "380939d9e64c0e31672c7ddd0ea056a2ec9fd5d0ed3dbb5ea218c9bf8b7a5430", kill_on_drop: false }`
[INFO] [stdout] 380939d9e64c0e31672c7ddd0ea056a2ec9fd5d0ed3dbb5ea218c9bf8b7a5430