[INFO] fetching crate fungi-lang 0.1.63...
[INFO] documenting fungi-lang-0.1.63 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate fungi-lang 0.1.63 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate fungi-lang 0.1.63 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fungi-lang 0.1.63
[INFO] finished tweaking crates.io crate fungi-lang 0.1.63
[INFO] tweaked toml for crates.io crate fungi-lang 0.1.63 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2cd5ecdb6940fe75715636d5d4dd03beb650d07a10657e027e68a207a3e1a5fa
[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" "2cd5ecdb6940fe75715636d5d4dd03beb650d07a10657e027e68a207a3e1a5fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2cd5ecdb6940fe75715636d5d4dd03beb650d07a10657e027e68a207a3e1a5fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cd5ecdb6940fe75715636d5d4dd03beb650d07a10657e027e68a207a3e1a5fa", kill_on_drop: false }`
[INFO] [stdout] 2cd5ecdb6940fe75715636d5d4dd03beb650d07a10657e027e68a207a3e1a5fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a31d3be66d6f3e1ca99f50aa2d8c1c2cdfc4e2b6d872cd67b2bf63c13342135
[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" "4a31d3be66d6f3e1ca99f50aa2d8c1c2cdfc4e2b6d872cd67b2bf63c13342135", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking adapton v0.3.31
[INFO] [stderr]     Checking proc-macro2 v0.3.8
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]  Documenting fungi-lang v0.1.63 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:95:1
[INFO] [stdout]    |
[INFO] [stdout] 95 | #![feature(crate_in_paths)]
[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 `fungi-lang`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name fungi_lang 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 adapton=/opt/rustwide/target/debug/deps/libadapton-409e8b7366b4f8c2.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-40b1625ff83a654e.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-2f329f3b80bec2a2.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-9a2a36c880f9f1fd.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-f8cc9e3f0262e49b.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-9657277a275bd2e8.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-88b85a5fc620d0fc.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "4a31d3be66d6f3e1ca99f50aa2d8c1c2cdfc4e2b6d872cd67b2bf63c13342135", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a31d3be66d6f3e1ca99f50aa2d8c1c2cdfc4e2b6d872cd67b2bf63c13342135", kill_on_drop: false }`
[INFO] [stdout] 4a31d3be66d6f3e1ca99f50aa2d8c1c2cdfc4e2b6d872cd67b2bf63c13342135