[INFO] fetching crate cursive_tree_view 0.6.0...
[INFO] documenting cursive_tree_view-0.6.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate cursive_tree_view 0.6.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate cursive_tree_view 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 cursive_tree_view 0.6.0
[INFO] finished tweaking crates.io crate cursive_tree_view 0.6.0
[INFO] tweaked toml for crates.io crate cursive_tree_view 0.6.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate cursive_tree_view 0.6.0 already has a lockfile, it will not be regenerated
[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 enumset_derive v0.4.3
[INFO] [stderr]   Downloaded enumset v0.4.4
[INFO] [stderr]   Downloaded cursive v0.14.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 4408b0b45ef699934043e510d9f71fe3a52589a9c1559b3200d76165619f1053
[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" "4408b0b45ef699934043e510d9f71fe3a52589a9c1559b3200d76165619f1053", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4408b0b45ef699934043e510d9f71fe3a52589a9c1559b3200d76165619f1053", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4408b0b45ef699934043e510d9f71fe3a52589a9c1559b3200d76165619f1053", kill_on_drop: false }`
[INFO] [stdout] 4408b0b45ef699934043e510d9f71fe3a52589a9c1559b3200d76165619f1053
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 603ec1737756684621d6c9ac398758ef83248ea42a89b3893cc8238e2a86bccf
[INFO] running `Command { std: "docker" "start" "-a" "603ec1737756684621d6c9ac398758ef83248ea42a89b3893cc8238e2a86bccf", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]     Checking arc-swap v0.4.4
[INFO] [stderr]     Checking array-macro v1.0.4
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking xi-unicode v0.2.0
[INFO] [stderr]    Compiling num-rational v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]    Compiling debug_stub_derive v0.3.0
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking signal-hook v0.1.12
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling enum-map-derive v0.4.3
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking enum-map v0.6.2
[INFO] [stderr]    Compiling const-random-macro v0.1.6
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling enumset_derive v0.4.3
[INFO] [stderr]     Checking const-random v0.1.6
[INFO] [stderr]     Checking ahash v0.2.18
[INFO] [stderr]     Checking enumset v0.4.4
[INFO] [stderr]     Checking cursive v0.14.0
[INFO] [stderr]  Documenting cursive_tree_view v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.55s
[INFO] running `Command { std: "docker" "inspect" "603ec1737756684621d6c9ac398758ef83248ea42a89b3893cc8238e2a86bccf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "603ec1737756684621d6c9ac398758ef83248ea42a89b3893cc8238e2a86bccf", kill_on_drop: false }`
[INFO] [stdout] 603ec1737756684621d6c9ac398758ef83248ea42a89b3893cc8238e2a86bccf