[INFO] fetching crate v_latexescape 0.6.0...
[INFO] documenting v_latexescape-0.6.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate v_latexescape 0.6.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate v_latexescape 0.6.0 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 v_latexescape 0.6.0
[INFO] finished tweaking crates.io crate v_latexescape 0.6.0
[INFO] tweaked toml for crates.io crate v_latexescape 0.6.0 written to /workspace/builds/worker-7/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 v_escape v0.9.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 028c9bb2f63296ee125fcac76a496e07f8b8e60157cf5807f207e4df3b9dc533
[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" "028c9bb2f63296ee125fcac76a496e07f8b8e60157cf5807f207e4df3b9dc533", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "028c9bb2f63296ee125fcac76a496e07f8b8e60157cf5807f207e4df3b9dc533", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "028c9bb2f63296ee125fcac76a496e07f8b8e60157cf5807f207e4df3b9dc533", kill_on_drop: false }`
[INFO] [stdout] 028c9bb2f63296ee125fcac76a496e07f8b8e60157cf5807f207e4df3b9dc533
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] df8c5f2ca8940636a27c85418ef1c3fefe66d48f7a50e879e9afa15461f97e8b
[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" "df8c5f2ca8940636a27c85418ef1c3fefe66d48f7a50e879e9afa15461f97e8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling v_latexescape v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling v_escape_derive v0.7.1
[INFO] [stderr]     Checking v_escape v0.9.4
[INFO] [stderr]  Documenting v_latexescape v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: proc-macro derive panicked
[INFO] [stdout]   --> src/lib.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | /         new_escape!(
[INFO] [stdout] 29 | |             LateXEscape,
[INFO] [stdout] 30 | |             "35->\\# || 36->\\$ || 37->\\% || 38->\\& || 92->\\textbackslash{} || \
[INFO] [stdout] 31 | |             94->\\textasciicircum{} || 95->\\_ || 123->\\{ || 125->\\} || 126->\\textasciitilde{}",
[INFO] [stdout] 32 | |             ranges = true, simd = true, avx = true
[INFO] [stdout] 33 | |         );
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: invalid attribute 'Some(Ident { ident: "ranges", span: #0 bytes(827..833) })'
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `v_latexescape`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name v_latexescape 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 cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-b31c81520e08f43a.rmeta --extern v_escape=/opt/rustwide/target/debug/deps/libv_escape-9dc87734072f2d56.rmeta --cap-lints=warn --crate-version 0.6.0 --cfg v_latexescape_simd --cfg v_latexescape_sse --cfg v_latexescape_avx` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "df8c5f2ca8940636a27c85418ef1c3fefe66d48f7a50e879e9afa15461f97e8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df8c5f2ca8940636a27c85418ef1c3fefe66d48f7a50e879e9afa15461f97e8b", kill_on_drop: false }`
[INFO] [stdout] df8c5f2ca8940636a27c85418ef1c3fefe66d48f7a50e879e9afa15461f97e8b