[INFO] fetching crate casperlabs-types 0.6.1...
[INFO] documenting casperlabs-types-0.6.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate casperlabs-types 0.6.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate casperlabs-types 0.6.1 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 casperlabs-types 0.6.1
[INFO] finished tweaking crates.io crate casperlabs-types 0.6.1
[INFO] tweaked toml for crates.io crate casperlabs-types 0.6.1 written to /workspace/builds/worker-1/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a17d3c4ed732afe28142ae799f1e3a269cdab5d36afaca413acc60ca22063dc6
[INFO] running `Command { std: "docker" "start" "-a" "a17d3c4ed732afe28142ae799f1e3a269cdab5d36afaca413acc60ca22063dc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a17d3c4ed732afe28142ae799f1e3a269cdab5d36afaca413acc60ca22063dc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a17d3c4ed732afe28142ae799f1e3a269cdab5d36afaca413acc60ca22063dc6", kill_on_drop: false }`
[INFO] [stdout] a17d3c4ed732afe28142ae799f1e3a269cdab5d36afaca413acc60ca22063dc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3d656955240b77fabcee40f68ef8005e3f50551d00e57c99deb91232ccbb2a17
[INFO] running `Command { std: "docker" "start" "-a" "3d656955240b77fabcee40f68ef8005e3f50551d00e57c99deb91232ccbb2a17", kill_on_drop: false }`
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking base16 v0.2.1
[INFO] [stderr]     Checking hex_fmt v0.3.0
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking blake2 v0.8.1
[INFO] [stderr]     Checking uint v0.8.5
[INFO] [stderr]  Documenting casperlabs-types v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     feature(min_specialization, try_reserve)
[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 `casperlabs-types`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name casperlabs_types 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-ae352888de8b7d37.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-c759f8d07719039e.rmeta --extern blake2=/opt/rustwide/target/debug/deps/libblake2-94d0192dc0038809.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-a21169e5ecf70fdf.rmeta --extern hex_fmt=/opt/rustwide/target/debug/deps/libhex_fmt-87013c2f3b265841.rmeta --extern num_derive=/opt/rustwide/target/debug/deps/libnum_derive-c1c328cfc50e2092.so --extern num_integer=/opt/rustwide/target/debug/deps/libnum_integer-1f8fab7e5e391c54.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-e1926912147b19ed.rmeta --extern uint=/opt/rustwide/target/debug/deps/libuint-1cb6cc9fe5ad19cc.rmeta --cap-lints=warn --crate-version 0.6.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "3d656955240b77fabcee40f68ef8005e3f50551d00e57c99deb91232ccbb2a17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d656955240b77fabcee40f68ef8005e3f50551d00e57c99deb91232ccbb2a17", kill_on_drop: false }`
[INFO] [stdout] 3d656955240b77fabcee40f68ef8005e3f50551d00e57c99deb91232ccbb2a17
