[INFO] fetching crate iprs 0.0.4...
[INFO] documenting iprs-0.0.4 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate iprs 0.0.4 into /workspace/builds/worker-102/source
[INFO] validating manifest of crates.io crate iprs 0.0.4 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 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-102/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" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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] [stdout] 9390ede6dc3b2b3c6b8c8016c73751de877d1311c3c2892b9699e4d59c20e71f
[INFO] running `Command { std: "docker" "start" "-a" "9390ede6dc3b2b3c6b8c8016c73751de877d1311c3c2892b9699e4d59c20e71f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9390ede6dc3b2b3c6b8c8016c73751de877d1311c3c2892b9699e4d59c20e71f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9390ede6dc3b2b3c6b8c8016c73751de877d1311c3c2892b9699e4d59c20e71f", kill_on_drop: false }`
[INFO] [stdout] 9390ede6dc3b2b3c6b8c8016c73751de877d1311c3c2892b9699e4d59c20e71f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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] [stdout] 8f8232ea1a59297e294dbcbd4a412050046c14c011eae52e805e1f997f6c4231
[INFO] running `Command { std: "docker" "start" "-a" "8f8232ea1a59297e294dbcbd4a412050046c14c011eae52e805e1f997f6c4231", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking subtle v2.3.0
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling data-encoding v2.3.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]    Compiling multimap v0.8.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]     Checking signature v1.2.2
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking keccak v0.1.0
[INFO] [stderr]     Checking base-x v0.2.6
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking bs58 v0.3.1
[INFO] [stderr]     Checking unsigned-varint v0.5.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking blake2s_simd v0.5.10
[INFO] [stderr]     Checking blake2b_simd v0.5.10
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking ed25519 v1.0.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]    Compiling blake3 v0.3.7
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking block-cipher-trait v0.6.2
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking dns-lookup v1.0.4
[INFO] [stderr]     Checking threefish-cipher v0.3.1
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking k12 v0.1.0
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]    Compiling prost-build v0.6.1
[INFO] [stderr]     Checking sha2 v0.9.1
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking sha-1 v0.9.1
[INFO] [stderr]     Checking ripemd160 v0.9.1
[INFO] [stderr]     Checking md4 v0.9.0
[INFO] [stderr]     Checking ripemd320 v0.9.0
[INFO] [stderr]     Checking skein-hash v0.3.0
[INFO] [stderr]     Checking hmac-drbg v0.2.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking libsecp256k1 v0.3.5
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]     Checking ctrlc v3.1.6
[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 zeroize v1.1.1
[INFO] [stderr]     Checking data-encoding-macro v0.1.8
[INFO] [stderr]     Checking curve25519-dalek v3.0.0
[INFO] [stderr]     Checking multibase v0.8.0
[INFO] [stderr]    Compiling prost v0.6.1
[INFO] [stderr]     Checking ed25519-dalek v1.0.1
[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-4c51d86e7fb4202c.rmeta --extern blake2b_simd=/opt/rustwide/target/debug/deps/libblake2b_simd-8722f14e186db6c3.rmeta --extern blake2s_simd=/opt/rustwide/target/debug/deps/libblake2s_simd-14912356f65eb053.rmeta --extern blake3=/opt/rustwide/target/debug/deps/libblake3-04037fb691290d88.rmeta --extern bs58=/opt/rustwide/target/debug/deps/libbs58-edd4608d8cd1a930.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-b20806e2d3579622.rmeta --extern ctrlc=/opt/rustwide/target/debug/deps/libctrlc-281c4194713acd99.rmeta --extern data_encoding=/opt/rustwide/target/debug/deps/libdata_encoding-3a1a32d8e5e1774e.rmeta --extern data_encoding_macro=/opt/rustwide/target/debug/deps/libdata_encoding_macro-0e9e755738388f7c.rmeta --extern digest=/opt/rustwide/target/debug/deps/libdigest-d96df8a6afcd6f01.rmeta --extern dns_lookup=/opt/rustwide/target/debug/deps/libdns_lookup-404050744b63d169.rmeta --extern ed25519_dalek=/opt/rustwide/target/debug/deps/libed25519_dalek-de7da61c06288001.rmeta --extern k12=/opt/rustwide/target/debug/deps/libk12-cbdcfa773a76ef4d.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-acd7d23482fe8b54.rmeta --extern secp256k1=/opt/rustwide/target/debug/deps/libsecp256k1-410400880acdeedc.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-0d0d65e1a097c29e.rmeta --extern md4=/opt/rustwide/target/debug/deps/libmd4-c43f599f37c779df.rmeta --extern md5=/opt/rustwide/target/debug/deps/libmd5-5afe596bfaa1d8c8.rmeta --extern multibase=/opt/rustwide/target/debug/deps/libmultibase-4450ad576d83a736.rmeta --extern prost=/opt/rustwide/target/debug/deps/libprost-c657de54b93047d1.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-b866e742cdfc6518.rmeta --extern ring=/opt/rustwide/target/debug/deps/libring-5650ad970d0c4d27.rmeta --extern ripemd160=/opt/rustwide/target/debug/deps/libripemd160-3ae2e1f5dba98e98.rmeta --extern ripemd320=/opt/rustwide/target/debug/deps/libripemd320-e4bdac522665474c.rmeta --extern sha1=/opt/rustwide/target/debug/deps/libsha1-8eb9a50c53ee36ef.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-cee568ace2ec5386.rmeta --extern sha3=/opt/rustwide/target/debug/deps/libsha3-5cda8bbec8bf9ce3.rmeta --extern skein_hash=/opt/rustwide/target/debug/deps/libskein_hash-6e0284994b65052c.rmeta --extern unsigned_varint=/opt/rustwide/target/debug/deps/libunsigned_varint-9430500175ad5ba1.rmeta --extern zeroize=/opt/rustwide/target/debug/deps/libzeroize-9e797e32e5fe4b7b.rmeta --cap-lints=warn --crate-version 0.0.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8f8232ea1a59297e294dbcbd4a412050046c14c011eae52e805e1f997f6c4231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f8232ea1a59297e294dbcbd4a412050046c14c011eae52e805e1f997f6c4231", kill_on_drop: false }`
[INFO] [stdout] 8f8232ea1a59297e294dbcbd4a412050046c14c011eae52e805e1f997f6c4231
