[INFO] crate lark-cli 0.1.0 is already in cache
[INFO] documenting lark-cli-0.1.0 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate lark-cli 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate lark-cli 0.1.0 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lark-cli 0.1.0
[INFO] finished tweaking crates.io crate lark-cli 0.1.0
[INFO] tweaked toml for crates.io crate lark-cli 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "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" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f061535411649d1fce500dcf5dcfda5478ca97d2be52ffa5d7dc778d890a6d3
[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" "3f061535411649d1fce500dcf5dcfda5478ca97d2be52ffa5d7dc778d890a6d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f061535411649d1fce500dcf5dcfda5478ca97d2be52ffa5d7dc778d890a6d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f061535411649d1fce500dcf5dcfda5478ca97d2be52ffa5d7dc778d890a6d3", kill_on_drop: false }`
[INFO] [stdout] 3f061535411649d1fce500dcf5dcfda5478ca97d2be52ffa5d7dc778d890a6d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f6ca9e80ac79a6a6b3b817b86a8f6a8fd5733ee0a7a7af54bb5dade361b0578
[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" "1f6ca9e80ac79a6a6b3b817b86a8f6a8fd5733ee0a7a7af54bb5dade361b0578", kill_on_drop: false }`
[INFO] [stderr]     Checking datafrog v2.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking cc v1.0.56
[INFO] [stderr]     Checking generational-arena v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking render-tree v0.1.1
[INFO] [stderr]     Checking serde v1.0.114
[INFO] [stderr]     Checking salsa v0.9.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking flexi_logger v0.10.7
[INFO] [stderr]     Checking serde_json v1.0.56
[INFO] [stderr]     Checking url_serde v0.2.0
[INFO] [stderr]     Checking language-reporting v0.3.1
[INFO] [stderr]     Checking languageserver-types v0.53.1
[INFO] [stderr]     Checking lark-span v0.1.0
[INFO] [stderr]     Checking lark-actor v0.1.0
[INFO] [stderr]     Checking lark-language-server v0.1.0
[INFO] [stderr]     Checking lark-error v0.1.0
[INFO] [stderr]     Checking lark-entity v0.1.0
[INFO] [stderr]     Checking lark-ty v0.1.0
[INFO] [stderr]     Checking lark-hir v0.1.0
[INFO] [stderr]     Checking lark-parser v0.1.0
[INFO] [stderr]     Checking lark-pretty-print v0.1.0
[INFO] [stderr]     Checking lark-type-check v0.1.0
[INFO] [stderr]     Checking lark-query-system v0.1.0
[INFO] [stderr]     Checking lark-build v0.1.0
[INFO] [stderr]     Checking lark-eval v0.1.0
[INFO] [stderr]  Documenting lark-cli v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(existential_type)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![feature(type_alias_impl_trait)]`
[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] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `lark-cli`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name lark_cli 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 flexi_logger=/opt/rustwide/target/debug/deps/libflexi_logger-770c5f614f4ee195.rmeta --extern language_reporting=/opt/rustwide/target/debug/deps/liblanguage_reporting-e7975212094c607b.rmeta --extern languageserver_types=/opt/rustwide/target/debug/deps/liblanguageserver_types-9ef3d418e0f9eca7.rmeta --extern lark_actor=/opt/rustwide/target/debug/deps/liblark_actor-287c26fe585624a9.rmeta --extern lark_build=/opt/rustwide/target/debug/deps/liblark_build-1144e8daa1d42378.rmeta --extern lark_debug_with=/opt/rustwide/target/debug/deps/liblark_debug_with-1a71c358e3ec811b.rmeta --extern lark_entity=/opt/rustwide/target/debug/deps/liblark_entity-26ce643eac5b722e.rmeta --extern lark_error=/opt/rustwide/target/debug/deps/liblark_error-d762ff0f00cc7bd7.rmeta --extern lark_eval=/opt/rustwide/target/debug/deps/liblark_eval-8013350185b1b8a7.rmeta --extern lark_hir=/opt/rustwide/target/debug/deps/liblark_hir-8c48a93e2e0c1300.rmeta --extern lark_intern=/opt/rustwide/target/debug/deps/liblark_intern-781ad3dee88487c4.rmeta --extern lark_language_server=/opt/rustwide/target/debug/deps/liblark_language_server-62464d3b1805fe3c.rmeta --extern lark_parser=/opt/rustwide/target/debug/deps/liblark_parser-ce63de98d56e6d70.rmeta --extern lark_query_system=/opt/rustwide/target/debug/deps/liblark_query_system-549afaab7ab22709.rmeta --extern lark_span=/opt/rustwide/target/debug/deps/liblark_span-d634f066c26afdf7.rmeta --extern lark_string=/opt/rustwide/target/debug/deps/liblark_string-8f7f5c5bb6b296f1.rmeta --extern lark_type_check=/opt/rustwide/target/debug/deps/liblark_type_check-185eeb0b90f5eff9.rmeta --extern lark_unify=/opt/rustwide/target/debug/deps/liblark_unify-3ccd34d609e2b5e1.rmeta --extern salsa=/opt/rustwide/target/debug/deps/libsalsa-03f9174da152a36f.rmeta --extern termcolor=/opt/rustwide/target/debug/deps/libtermcolor-0d47dfaf7682a2d2.rmeta --cap-lints=forbid` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "1f6ca9e80ac79a6a6b3b817b86a8f6a8fd5733ee0a7a7af54bb5dade361b0578", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f6ca9e80ac79a6a6b3b817b86a8f6a8fd5733ee0a7a7af54bb5dade361b0578", kill_on_drop: false }`
[INFO] [stdout] 1f6ca9e80ac79a6a6b3b817b86a8f6a8fd5733ee0a7a7af54bb5dade361b0578