[INFO] fetching crate syntex_syntax2 0.0.2...
[INFO] documenting syntex_syntax2-0.0.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate syntex_syntax2 0.0.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate syntex_syntax2 0.0.2 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 syntex_syntax2 0.0.2
[INFO] finished tweaking crates.io crate syntex_syntax2 0.0.2
[INFO] tweaked toml for crates.io crate syntex_syntax2 0.0.2 written to /workspace/builds/worker-6/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "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] 4bbc2af19307f57874352e6472e76b03668ca787c5da4abda09b1e2e1d63cc90
[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" "4bbc2af19307f57874352e6472e76b03668ca787c5da4abda09b1e2e1d63cc90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bbc2af19307f57874352e6472e76b03668ca787c5da4abda09b1e2e1d63cc90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bbc2af19307f57874352e6472e76b03668ca787c5da4abda09b1e2e1d63cc90", kill_on_drop: false }`
[INFO] [stdout] 4bbc2af19307f57874352e6472e76b03668ca787c5da4abda09b1e2e1d63cc90
[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" "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] 5182fd82a455121dfa9faf266ccd0f6f8f724cbe3788fe3f32e33d379d1be1ad
[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" "5182fd82a455121dfa9faf266ccd0f6f8f724cbe3788fe3f32e33d379d1be1ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling extprim v1.7.1
[INFO] [stderr]     Checking syntex_pos v0.59.1
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking syntex_errors v0.59.1
[INFO] [stderr]  Documenting syntex_syntax2 v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/parse/lexer/mod.rs:322:9
[INFO] [stdout]     |
[INFO] [stdout] 322 |         (pos - self.filemap.start_pos)
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/parse/lexer/mod.rs:733:20
[INFO] [stdout]     |
[INFO] [stdout] 733 |                 '0'...'9' | '_' | '.' | 'e' | 'E' => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/print/pprust.rs:676:17
[INFO] [stdout]     |
[INFO] [stdout] 676 |                 (format!("\"{}\"", parse::escape_default(st)))
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/print/pprust.rs:679:17
[INFO] [stdout]     |
[INFO] [stdout] 679 | /                 (format!("r{delim}\"{string}\"{delim}",
[INFO] [stdout] 680 | |                          delim=repeat("#", n),
[INFO] [stdout] 681 | |                          string=st))
[INFO] [stdout]     | |____________________________________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 679 |                 format!("r{delim}\"{string}\"{delim}",
[INFO] [stdout] 680 |                          delim=repeat("#", n),
[INFO] [stdout] 681 |                          string=st)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.61s
[INFO] running `Command { std: "docker" "inspect" "5182fd82a455121dfa9faf266ccd0f6f8f724cbe3788fe3f32e33d379d1be1ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5182fd82a455121dfa9faf266ccd0f6f8f724cbe3788fe3f32e33d379d1be1ad", kill_on_drop: false }`
[INFO] [stdout] 5182fd82a455121dfa9faf266ccd0f6f8f724cbe3788fe3f32e33d379d1be1ad