[INFO] fetching crate opencontainers 0.0.0-alpha.2...
[INFO] documenting opencontainers-0.0.0-alpha.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate opencontainers 0.0.0-alpha.2 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate opencontainers 0.0.0-alpha.2 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate opencontainers 0.0.0-alpha.2
[INFO] finished tweaking crates.io crate opencontainers 0.0.0-alpha.2
[INFO] tweaked toml for crates.io crate opencontainers 0.0.0-alpha.2 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ttl_cache v0.5.1
[INFO] [stderr]   Downloaded pretty_env_logger v0.3.1
[INFO] [stderr]   Downloaded www-authenticate v0.3.0
[INFO] [stderr]   Downloaded hyperx v0.13.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c7a5f714e7f6894e044c6101bf8cae5e583fd7c84e56568fa6180602c7943f7a
[INFO] running `Command { std: "docker" "start" "-a" "c7a5f714e7f6894e044c6101bf8cae5e583fd7c84e56568fa6180602c7943f7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7a5f714e7f6894e044c6101bf8cae5e583fd7c84e56568fa6180602c7943f7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7a5f714e7f6894e044c6101bf8cae5e583fd7c84e56568fa6180602c7943f7a", kill_on_drop: false }`
[INFO] [stdout] c7a5f714e7f6894e044c6101bf8cae5e583fd7c84e56568fa6180602c7943f7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f905dc0921b84dc74fe1421f6e926f2e226e3f6ff9cb9b4252b3d89efb60c46
[INFO] running `Command { std: "docker" "start" "-a" "8f905dc0921b84dc74fe1421f6e926f2e226e3f6ff9cb9b4252b3d89efb60c46", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking futures v0.1.31
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[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking dtoa v0.4.8
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[INFO] [stderr]    Compiling proc-macro2 v1.0.39
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[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling httparse v1.7.1
[INFO] [stderr]     Checking miniz_oxide v0.5.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking base64 v0.10.1
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[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]     Checking publicsuffix v1.5.6
[INFO] [stderr]     Checking www-authenticate v0.3.0
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
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[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]  Documenting opencontainers v0.0.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(never_type)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `opencontainers`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name opencontainers src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5de2ee433fc089f6 -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-f0efa361598070e2.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-f9da323ccf5faa4c.rmeta --extern hyperx=/opt/rustwide/target/debug/deps/libhyperx-2ec836aea42cac36.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-4c2b941844e2fcbb.rmeta --extern pest=/opt/rustwide/target/debug/deps/libpest-ad621116ccc3017c.rmeta --extern pest_derive=/opt/rustwide/target/debug/deps/libpest_derive-958a3224c99d7a10.so --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-2a0c29dd630c8be4.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-650d8b02fec04740.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-be4dc406b9450eb4.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-39ee29c294784330.rmeta --extern ttl_cache=/opt/rustwide/target/debug/deps/libttl_cache-6408ddadca596422.rmeta --extern www_authenticate=/opt/rustwide/target/debug/deps/libwww_authenticate-2fda85b25eae2dbd.rmeta --cap-lints=warn --crate-version 0.0.0-alpha.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8f905dc0921b84dc74fe1421f6e926f2e226e3f6ff9cb9b4252b3d89efb60c46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f905dc0921b84dc74fe1421f6e926f2e226e3f6ff9cb9b4252b3d89efb60c46", kill_on_drop: false }`
[INFO] [stdout] 8f905dc0921b84dc74fe1421f6e926f2e226e3f6ff9cb9b4252b3d89efb60c46