[INFO] fetching crate json-trait-rs 0.11.0... [INFO] documenting json-trait-rs-0.11.0 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566 [INFO] extracting crate json-trait-rs 0.11.0 into /workspace/builds/worker-0/source [INFO] validating manifest of crates.io crate json-trait-rs 0.11.0 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 json-trait-rs 0.11.0 [INFO] finished tweaking crates.io crate json-trait-rs 0.11.0 [INFO] tweaked toml for crates.io crate json-trait-rs 0.11.0 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] 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] 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] f888b44e285f72377d741bb8593f7c3fb33c9d2ee104341c5969c1f4a4b4b3b8 [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" "f888b44e285f72377d741bb8593f7c3fb33c9d2ee104341c5969c1f4a4b4b3b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f888b44e285f72377d741bb8593f7c3fb33c9d2ee104341c5969c1f4a4b4b3b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f888b44e285f72377d741bb8593f7c3fb33c9d2ee104341c5969c1f4a4b4b3b8", kill_on_drop: false }` [INFO] [stdout] f888b44e285f72377d741bb8593f7c3fb33c9d2ee104341c5969c1f4a4b4b3b8 [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] 0e15fe4045a28522c22a0429db5de7421b1cbb96a30cf62d02abf50a2201ff44 [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" "0e15fe4045a28522c22a0429db5de7421b1cbb96a30cf62d02abf50a2201ff44", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.18 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling syn v1.0.33 [INFO] [stderr] Compiling libc v0.2.71 [INFO] [stderr] Checking join-lazy-fmt v0.9.2 [INFO] [stderr] Checking strum v0.18.0 [INFO] [stderr] Checking backtrace v0.3.49 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Compiling synstructure v0.12.4 [INFO] [stderr] Compiling failure_derive v0.1.8 [INFO] [stderr] Compiling strum_macros v0.18.0 [INFO] [stderr] Checking failure v0.1.8 [INFO] [stderr] Documenting json-trait-rs v0.11.0 (/opt/rustwide/workdir) [INFO] [stdout] error: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:43:12 [INFO] [stdout] | [INFO] [stdout] 43 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> src/lib.rs:37:5 [INFO] [stdout] | [INFO] [stdout] 37 | warnings, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] = note: `#[deny(incomplete_features)]` implied by `#[deny(warnings)]` [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: Could not document `json-trait-rs`. [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name json_trait_rs src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern failure=/opt/rustwide/target/debug/deps/libfailure-28f81708a899f131.rmeta --extern join_lazy_fmt=/opt/rustwide/target/debug/deps/libjoin_lazy_fmt-96ef5c832da5eb38.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-489c235a735a8193.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-715465df16f77eb8.so --cap-lints=forbid` (exit code: 1) [INFO] running `Command { std: "docker" "inspect" "0e15fe4045a28522c22a0429db5de7421b1cbb96a30cf62d02abf50a2201ff44", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0e15fe4045a28522c22a0429db5de7421b1cbb96a30cf62d02abf50a2201ff44", kill_on_drop: false }` [INFO] [stdout] 0e15fe4045a28522c22a0429db5de7421b1cbb96a30cf62d02abf50a2201ff44