[INFO] fetching crate ffishim 0.1.2...
[INFO] documenting ffishim-0.1.2 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate ffishim 0.1.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate ffishim 0.1.2 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ffishim 0.1.2
[INFO] finished tweaking crates.io crate ffishim 0.1.2
[INFO] tweaked toml for crates.io crate ffishim 0.1.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f00cc7686d026d38a76e510ebbf9b4db302764d704eac994ec13373bc48c552
[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" "3f00cc7686d026d38a76e510ebbf9b4db302764d704eac994ec13373bc48c552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f00cc7686d026d38a76e510ebbf9b4db302764d704eac994ec13373bc48c552", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f00cc7686d026d38a76e510ebbf9b4db302764d704eac994ec13373bc48c552", kill_on_drop: false }`
[INFO] [stdout] 3f00cc7686d026d38a76e510ebbf9b4db302764d704eac994ec13373bc48c552
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a624a3e7dabf189308337d15f91d6c67f029cfab0a57c1a9b11c55aea155b3f9
[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" "a624a3e7dabf189308337d15f91d6c67f029cfab0a57c1a9b11c55aea155b3f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]     Checking ident_case v1.0.1
[INFO] [stderr]     Checking heck v0.3.1
[INFO] [stderr]     Checking darling_core v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking darling v0.10.2
[INFO] [stderr]  Documenting ffishim v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(vec_into_raw_parts)]
[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 `ffishim`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name ffishim 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 anyhow=/opt/rustwide/target/debug/deps/libanyhow-e8218b22857a1d1d.rmeta --extern darling=/opt/rustwide/target/debug/deps/libdarling-5430a5cb19a87944.rmeta --extern heck=/opt/rustwide/target/debug/deps/libheck-eb12dc8ae39abf4f.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-0d4e59a692e831a5.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-d926fdf7c10f1bde.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-b4948a6fe27164b5.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-53f2a7d91ebafebf.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-f6866910b897f04b.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-c93dbb7674e6f269.rmeta --cap-lints=warn --crate-version 0.1.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "a624a3e7dabf189308337d15f91d6c67f029cfab0a57c1a9b11c55aea155b3f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a624a3e7dabf189308337d15f91d6c67f029cfab0a57c1a9b11c55aea155b3f9", kill_on_drop: false }`
[INFO] [stdout] a624a3e7dabf189308337d15f91d6c67f029cfab0a57c1a9b11c55aea155b3f9
