[INFO] fetching crate victor 0.0.1...
[INFO] documenting victor-0.0.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate victor 0.0.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate victor 0.0.1 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 victor 0.0.1
[INFO] finished tweaking crates.io crate victor 0.0.1
[INFO] tweaked toml for crates.io crate victor 0.0.1 written to /workspace/builds/worker-1/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 4a22a0f2313c11a2bda397657396420c4b38b294069cd8d3afabeff03ee66be7
[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" "4a22a0f2313c11a2bda397657396420c4b38b294069cd8d3afabeff03ee66be7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a22a0f2313c11a2bda397657396420c4b38b294069cd8d3afabeff03ee66be7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a22a0f2313c11a2bda397657396420c4b38b294069cd8d3afabeff03ee66be7", kill_on_drop: false }`
[INFO] [stdout] 4a22a0f2313c11a2bda397657396420c4b38b294069cd8d3afabeff03ee66be7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] b5335f7af2ad4d5dafc76fcf432b69626746b322acba914859dc0d0d8e20c288
[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" "b5335f7af2ad4d5dafc76fcf432b69626746b322acba914859dc0d0d8e20c288", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v0.1.8
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]     Checking xml-rs v0.3.6
[INFO] [stderr]     Checking cssparser v0.5.8
[INFO] [stderr]    Compiling string_cache v0.2.29
[INFO] [stderr]     Checking debug_unreachable v0.1.1
[INFO] [stderr]     Checking quickersort v2.2.0
[INFO] [stderr]     Checking selectors v0.5.9
[INFO] [stderr]  Documenting victor v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(dropck_parametricity)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor_blind_to_params` in this scope
[INFO] [stdout]   --> src/arena.rs:71:7
[INFO] [stdout]    |
[INFO] [stdout] 71 |     #[unsafe_destructor_blind_to_params]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(dropck_parametricity)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `victor`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name victor 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 cssparser=/opt/rustwide/target/debug/deps/libcssparser-18aea60aef8dc11c.rmeta --extern matches=/opt/rustwide/target/debug/deps/libmatches-54ad82543365efe0.rmeta --extern selectors=/opt/rustwide/target/debug/deps/libselectors-28b319e9eeb50793.rmeta --extern string_cache=/opt/rustwide/target/debug/deps/libstring_cache-8f468387dbc32caa.rmeta --extern xml=/opt/rustwide/target/debug/deps/libxml-97f2e7242b6b492f.rmeta --cap-lints=warn --crate-version 0.0.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "b5335f7af2ad4d5dafc76fcf432b69626746b322acba914859dc0d0d8e20c288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5335f7af2ad4d5dafc76fcf432b69626746b322acba914859dc0d0d8e20c288", kill_on_drop: false }`
[INFO] [stdout] b5335f7af2ad4d5dafc76fcf432b69626746b322acba914859dc0d0d8e20c288