[INFO] fetching crate iprs 0.0.4...
[INFO] documenting iprs-0.0.4 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate iprs 0.0.4 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate iprs 0.0.4 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 iprs 0.0.4
[INFO] finished tweaking crates.io crate iprs 0.0.4
[INFO] tweaked toml for crates.io crate iprs 0.0.4 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate iprs 0.0.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 2809d5dfbeb9327869a5e289219a3da6effb80356a841e457ea7ea79d19305dc
[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" "2809d5dfbeb9327869a5e289219a3da6effb80356a841e457ea7ea79d19305dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2809d5dfbeb9327869a5e289219a3da6effb80356a841e457ea7ea79d19305dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2809d5dfbeb9327869a5e289219a3da6effb80356a841e457ea7ea79d19305dc", kill_on_drop: false }`
[INFO] [stdout] 2809d5dfbeb9327869a5e289219a3da6effb80356a841e457ea7ea79d19305dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] e651b87942bbda726f17db04a9cee95d62c397ffa294683f9ab99ef77f985f21
[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" "e651b87942bbda726f17db04a9cee95d62c397ffa294683f9ab99ef77f985f21", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking unsigned-varint v0.5.1
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]    Compiling blake3 v0.3.7
[INFO] [stderr]     Checking ed25519 v1.0.2
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking k12 v0.1.0
[INFO] [stderr]     Checking ctrlc v3.1.6
[INFO] [stderr]     Checking sha2 v0.9.1
[INFO] [stderr]     Checking sha-1 v0.9.1
[INFO] [stderr]     Checking md4 v0.9.0
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking ripemd160 v0.9.1
[INFO] [stderr]     Checking ripemd320 v0.9.0
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]     Checking dns-lookup v1.0.4
[INFO] [stderr]     Checking blake2b_simd v0.5.10
[INFO] [stderr]     Checking blake2s_simd v0.5.10
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking threefish-cipher v0.3.1
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking libsecp256k1 v0.3.5
[INFO] [stderr]     Checking skein-hash v0.3.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling zeroize_derive v1.0.1
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.8
[INFO] [stderr]    Compiling asn1_der_derive v0.1.2
[INFO] [stderr]     Checking asn1_der v0.6.3
[INFO] [stderr]     Checking data-encoding-macro v0.1.8
[INFO] [stderr]     Checking zeroize v1.1.1
[INFO] [stderr]     Checking multibase v0.8.0
[INFO] [stderr]     Checking curve25519-dalek v3.0.0
[INFO] [stderr]     Checking ed25519-dalek v1.0.1
[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]    Compiling prost-types v0.6.1
[INFO] [stderr]    Compiling iprs v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting iprs v0.0.4 (/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(box_syntax, box_patterns)]
[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 `iprs`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name iprs src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="libsecp256k1"' --cfg 'feature="secp256k1"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern asn1_der=/opt/rustwide/target/debug/deps/libasn1_der-857252fed6e93f89.rmeta --extern blake2b_simd=/opt/rustwide/target/debug/deps/libblake2b_simd-829cdb59322212ce.rmeta --extern blake2s_simd=/opt/rustwide/target/debug/deps/libblake2s_simd-bffe9cf549453f8c.rmeta --extern blake3=/opt/rustwide/target/debug/deps/libblake3-b521577e6f6a7501.rmeta --extern bs58=/opt/rustwide/target/debug/deps/libbs58-b2511d5f60fe6a53.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-70ab6c11dfb5dbe1.rmeta --extern ctrlc=/opt/rustwide/target/debug/deps/libctrlc-fd7fc5faefcdea4d.rmeta --extern data_encoding=/opt/rustwide/target/debug/deps/libdata_encoding-128be59d73119f3b.rmeta --extern data_encoding_macro=/opt/rustwide/target/debug/deps/libdata_encoding_macro-ff93cd54fc0579e4.rmeta --extern digest=/opt/rustwide/target/debug/deps/libdigest-bb6b5958e31af364.rmeta --extern dns_lookup=/opt/rustwide/target/debug/deps/libdns_lookup-e9ee4590d8084929.rmeta --extern ed25519_dalek=/opt/rustwide/target/debug/deps/libed25519_dalek-bf4c42abd499cf50.rmeta --extern k12=/opt/rustwide/target/debug/deps/libk12-7d050f4af6fa3b5e.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-72923b2d9aa06af7.rmeta --extern secp256k1=/opt/rustwide/target/debug/deps/libsecp256k1-d80ebe4e69a6ffb0.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f79d479758e09bc7.rmeta --extern md4=/opt/rustwide/target/debug/deps/libmd4-f8a8d04d1c0ac48f.rmeta --extern md5=/opt/rustwide/target/debug/deps/libmd5-0823bd82b1e8371e.rmeta --extern multibase=/opt/rustwide/target/debug/deps/libmultibase-fb9bcd12118fdc06.rmeta --extern prost=/opt/rustwide/target/debug/deps/libprost-102889e821224b4c.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-9d7ab5406e0c3c64.rmeta --extern ring=/opt/rustwide/target/debug/deps/libring-578302c5a6296795.rmeta --extern ripemd160=/opt/rustwide/target/debug/deps/libripemd160-61244507c59c5119.rmeta --extern ripemd320=/opt/rustwide/target/debug/deps/libripemd320-0dca7809fa029e4d.rmeta --extern sha1=/opt/rustwide/target/debug/deps/libsha1-f583d7ce162d13bf.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-166b3b1a575958c6.rmeta --extern sha3=/opt/rustwide/target/debug/deps/libsha3-1f1e72a10f2f0097.rmeta --extern skein_hash=/opt/rustwide/target/debug/deps/libskein_hash-85501cff711e3e1a.rmeta --extern unsigned_varint=/opt/rustwide/target/debug/deps/libunsigned_varint-ee67049548e56ea1.rmeta --extern zeroize=/opt/rustwide/target/debug/deps/libzeroize-44d4b14357160333.rmeta --cap-lints=warn --crate-version 0.0.4` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "e651b87942bbda726f17db04a9cee95d62c397ffa294683f9ab99ef77f985f21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e651b87942bbda726f17db04a9cee95d62c397ffa294683f9ab99ef77f985f21", kill_on_drop: false }`
[INFO] [stdout] e651b87942bbda726f17db04a9cee95d62c397ffa294683f9ab99ef77f985f21
