[INFO] fetching crate byml 0.1.4...
[INFO] documenting byml-0.1.4 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate byml 0.1.4 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate byml 0.1.4 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate byml 0.1.4
[INFO] finished tweaking crates.io crate byml 0.1.4
[INFO] tweaked toml for crates.io crate byml 0.1.4 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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" "+1.54.0" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3eb8b61bb83d420bd12e5bbd185decfd2856e8b3c03fc9592b2bbe018780fbe1
[INFO] running `Command { std: "docker" "start" "-a" "3eb8b61bb83d420bd12e5bbd185decfd2856e8b3c03fc9592b2bbe018780fbe1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3eb8b61bb83d420bd12e5bbd185decfd2856e8b3c03fc9592b2bbe018780fbe1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3eb8b61bb83d420bd12e5bbd185decfd2856e8b3c03fc9592b2bbe018780fbe1", kill_on_drop: false }`
[INFO] [stdout] 3eb8b61bb83d420bd12e5bbd185decfd2856e8b3c03fc9592b2bbe018780fbe1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c347d14ede47d5c3a2d8d83014f83b6f73658c676cecdce1bc240adeab14d38
[INFO] running `Command { std: "docker" "start" "-a" "5c347d14ede47d5c3a2d8d83014f83b6f73658c676cecdce1bc240adeab14d38", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking yaz0 v0.1.2
[INFO] [stderr]     Checking parse_int v0.4.0
[INFO] [stderr]    Compiling cached_proc_macro v0.4.0
[INFO] [stderr]     Checking cached v0.20.0
[INFO] [stderr]  Documenting byml v0.1.4 (/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(seek_convenience)]
[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 `byml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name byml 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 base64=/opt/rustwide/target/debug/deps/libbase64-97875349cab274e6.rmeta --extern binread=/opt/rustwide/target/debug/deps/libbinread-2bdfc19ef76add8c.rmeta --extern binwrite=/opt/rustwide/target/debug/deps/libbinwrite-e3e68ef4d09b1867.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-b55b8e72bfe1c077.rmeta --extern cached=/opt/rustwide/target/debug/deps/libcached-8fe625f56a972908.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-218e630add9fbf9b.rmeta --extern parse_int=/opt/rustwide/target/debug/deps/libparse_int-1dc6c026bb76e7aa.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-b6b35a89be1d7184.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-ad0ca6b90949e531.rmeta --extern yaz0=/opt/rustwide/target/debug/deps/libyaz0-b1232a38b17ae76e.rmeta --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5c347d14ede47d5c3a2d8d83014f83b6f73658c676cecdce1bc240adeab14d38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c347d14ede47d5c3a2d8d83014f83b6f73658c676cecdce1bc240adeab14d38", kill_on_drop: false }`
[INFO] [stdout] 5c347d14ede47d5c3a2d8d83014f83b6f73658c676cecdce1bc240adeab14d38
