[INFO] fetching crate casperlabs-contract-ffi 0.22.0...
[INFO] documenting casperlabs-contract-ffi-0.22.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate casperlabs-contract-ffi 0.22.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate casperlabs-contract-ffi 0.22.0 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 casperlabs-contract-ffi 0.22.0
[INFO] finished tweaking crates.io crate casperlabs-contract-ffi 0.22.0
[INFO] tweaked toml for crates.io crate casperlabs-contract-ffi 0.22.0 written to /workspace/builds/worker-14/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 7c2bef45789f502f692a80a04b04d5c44d9cab5a7f65a98441cabe36b8b54fc5
[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" "7c2bef45789f502f692a80a04b04d5c44d9cab5a7f65a98441cabe36b8b54fc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c2bef45789f502f692a80a04b04d5c44d9cab5a7f65a98441cabe36b8b54fc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c2bef45789f502f692a80a04b04d5c44d9cab5a7f65a98441cabe36b8b54fc5", kill_on_drop: false }`
[INFO] [stdout] 7c2bef45789f502f692a80a04b04d5c44d9cab5a7f65a98441cabe36b8b54fc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 2d319248386c180cc6ba87775dce3f40a4c26cf42510b40bec5fdf1c14bb4bd7
[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" "2d319248386c180cc6ba87775dce3f40a4c26cf42510b40bec5fdf1c14bb4bd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling wee_alloc v0.4.5
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking memory_units v0.4.0
[INFO] [stderr]     Checking hex_fmt v0.3.0
[INFO] [stderr]     Checking base16 v0.2.1
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking blake2 v0.8.1
[INFO] [stderr]     Checking uint v0.8.5
[INFO] [stderr]  Documenting casperlabs-contract-ffi v0.22.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `alloc::alloc::Alloc`
[INFO] [stdout]   --> src/contract_api/mod.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     alloc::{Alloc, Global},
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             no `Alloc` in `alloc`
[INFO] [stdout]    |             help: a similar name exists in the module: `alloc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | / #![feature(
[INFO] [stdout] 48 | |     allocator_api,
[INFO] [stdout] 49 | |     core_intrinsics,
[INFO] [stdout] 50 | |     lang_items,
[INFO] [stdout] ...  |
[INFO] [stdout] 53 | |     try_reserve
[INFO] [stdout] 54 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `casperlabs-contract-ffi`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name casperlabs_contract_ffi 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 base16=/opt/rustwide/target/debug/deps/libbase16-57c0779a3d7c9f1e.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-b7cb6f2855b37747.rmeta --extern blake2=/opt/rustwide/target/debug/deps/libblake2-48636f4af01eb49b.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-5011571ce231e020.rmeta --extern hex_fmt=/opt/rustwide/target/debug/deps/libhex_fmt-81b94d184e03f6f5.rmeta --extern num_derive=/opt/rustwide/target/debug/deps/libnum_derive-c4278c19338dbfd2.so --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-b32ff6efe189bdd2.rmeta --extern uint=/opt/rustwide/target/debug/deps/libuint-02bdc71ba2940cdc.rmeta --extern wee_alloc=/opt/rustwide/target/debug/deps/libwee_alloc-4628165f5f3378ae.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "2d319248386c180cc6ba87775dce3f40a4c26cf42510b40bec5fdf1c14bb4bd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d319248386c180cc6ba87775dce3f40a4c26cf42510b40bec5fdf1c14bb4bd7", kill_on_drop: false }`
[INFO] [stdout] 2d319248386c180cc6ba87775dce3f40a4c26cf42510b40bec5fdf1c14bb4bd7