[INFO] fetching crate multiformats 0.1.0...
[INFO] documenting multiformats-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate multiformats 0.1.0 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate multiformats 0.1.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate multiformats 0.1.0
[INFO] finished tweaking crates.io crate multiformats 0.1.0
[INFO] tweaked toml for crates.io crate multiformats 0.1.0 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded block-padding v0.2.1
[INFO] [stderr]   Downloaded ripemd160 v0.9.1
[INFO] [stderr]   Downloaded data-encoding-macro v0.1.12
[INFO] [stderr]   Downloaded data-encoding-macro-internal v0.1.10
[INFO] [stderr]   Downloaded multibase v0.8.0
[INFO] [stderr]   Downloaded reqwest v0.10.10
[INFO] [stderr]   Downloaded crypto-mac v0.8.0
[INFO] [stderr]   Downloaded base-x v0.2.10
[INFO] [stderr]   Downloaded md4 v0.9.0
[INFO] [stderr]   Downloaded bs58 v0.3.1
[INFO] [stderr]   Downloaded blake2s_simd v0.5.11
[INFO] [stderr]   Downloaded threefish-cipher v0.4.0
[INFO] [stderr]   Downloaded skein-hash v0.3.1
[INFO] [stderr]   Downloaded cipher v0.2.5
[INFO] [stderr]   Downloaded ripemd320 v0.9.0
[INFO] [stderr]   Downloaded parse_int v0.4.0
[INFO] [stderr]   Downloaded unsigned-varint v0.5.1
[INFO] [stderr]   Downloaded hyper v0.13.10
[INFO] [stderr]   Downloaded blake3 v0.3.8
[INFO] [stderr]   Downloaded sha3 v0.9.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c651cca27f371cfca3ba31fbd3a5b9801db6a090cbd0872c4cb4596269df873
[INFO] running `Command { std: "docker" "start" "-a" "8c651cca27f371cfca3ba31fbd3a5b9801db6a090cbd0872c4cb4596269df873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c651cca27f371cfca3ba31fbd3a5b9801db6a090cbd0872c4cb4596269df873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c651cca27f371cfca3ba31fbd3a5b9801db6a090cbd0872c4cb4596269df873", kill_on_drop: false }`
[INFO] [stdout] 8c651cca27f371cfca3ba31fbd3a5b9801db6a090cbd0872c4cb4596269df873
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cba75662311caf9cb8ca440b20cab6c8fb3bba229be8c2629cacd056778179c1
[INFO] running `Command { std: "docker" "start" "-a" "cba75662311caf9cb8ca440b20cab6c8fb3bba229be8c2629cacd056778179c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]    Compiling data-encoding v2.3.2
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking constant_time_eq v0.1.5
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking cpufeatures v0.2.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking base-x v0.2.10
[INFO] [stderr]     Checking keccak v0.1.2
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking unsigned-varint v0.5.1
[INFO] [stderr]     Checking bs58 v0.3.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking blake2b_simd v0.5.11
[INFO] [stderr]     Checking blake2s_simd v0.5.11
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling blake3 v0.3.8
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking cipher v0.2.5
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking ripemd160 v0.9.1
[INFO] [stderr]     Checking sha-1 v0.9.8
[INFO] [stderr]     Checking md4 v0.9.0
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking ripemd320 v0.9.0
[INFO] [stderr]     Checking threefish-cipher v0.4.0
[INFO] [stderr]     Checking skein-hash v0.3.1
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.10
[INFO] [stderr]     Checking data-encoding-macro v0.1.12
[INFO] [stderr]     Checking multibase v0.8.0
[INFO] [stderr]  Documenting multiformats v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(box_syntax, box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/multihash/mod.rs:80:10
[INFO] [stdout]    |
[INFO] [stdout] 80 |         };
[INFO] [stdout]    |          ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `multiformats`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name multiformats src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9491a93c1198b1ab -L dependency=/opt/rustwide/target/debug/deps --extern blake2b_simd=/opt/rustwide/target/debug/deps/libblake2b_simd-3d8a365a9cf72ae1.rmeta --extern blake2s_simd=/opt/rustwide/target/debug/deps/libblake2s_simd-eb1d8cec845ff206.rmeta --extern blake3=/opt/rustwide/target/debug/deps/libblake3-7af42f0ea658cd38.rmeta --extern bs58=/opt/rustwide/target/debug/deps/libbs58-191531ec66dba439.rmeta --extern data_encoding=/opt/rustwide/target/debug/deps/libdata_encoding-3af01e88251629b0.rmeta --extern data_encoding_macro=/opt/rustwide/target/debug/deps/libdata_encoding_macro-2fd548d05268f4aa.rmeta --extern digest=/opt/rustwide/target/debug/deps/libdigest-6661d89dd0f47777.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-1479f2b7adeaa2b6.rmeta --extern md4=/opt/rustwide/target/debug/deps/libmd4-f77d49daf7b75b8e.rmeta --extern md5=/opt/rustwide/target/debug/deps/libmd5-05cdc6da942a1386.rmeta --extern multibase=/opt/rustwide/target/debug/deps/libmultibase-5e18fb33ec886b46.rmeta --extern ripemd160=/opt/rustwide/target/debug/deps/libripemd160-ff0be488d4ff7876.rmeta --extern ripemd320=/opt/rustwide/target/debug/deps/libripemd320-77ccd29af061f785.rmeta --extern sha1=/opt/rustwide/target/debug/deps/libsha1-90c282d2fd9c150e.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-ac29ffd70ff45425.rmeta --extern sha3=/opt/rustwide/target/debug/deps/libsha3-82de56a76a4a3d0e.rmeta --extern skein_hash=/opt/rustwide/target/debug/deps/libskein_hash-4f6afec23e372fde.rmeta --extern unsigned_varint=/opt/rustwide/target/debug/deps/libunsigned_varint-2b4959f715a984da.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "cba75662311caf9cb8ca440b20cab6c8fb3bba229be8c2629cacd056778179c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cba75662311caf9cb8ca440b20cab6c8fb3bba229be8c2629cacd056778179c1", kill_on_drop: false }`
[INFO] [stdout] cba75662311caf9cb8ca440b20cab6c8fb3bba229be8c2629cacd056778179c1