[INFO] cloning repository https://github.com/eadventurous/iroha_wasm_prototype
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eadventurous/iroha_wasm_prototype" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feadventurous%2Firoha_wasm_prototype", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feadventurous%2Firoha_wasm_prototype'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eb6cfdff9523f700b16a0aa75f5b73db8f8f5b14
[INFO] documenting eadventurous/iroha_wasm_prototype against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feadventurous%2Firoha_wasm_prototype" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eadventurous/iroha_wasm_prototype 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 git repo https://github.com/eadventurous/iroha_wasm_prototype
[INFO] finished tweaking git repo https://github.com/eadventurous/iroha_wasm_prototype
[INFO] tweaked toml for git repo https://github.com/eadventurous/iroha_wasm_prototype written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/eadventurous/iroha_wasm_prototype already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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 }`
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[INFO] running `Command { std: "docker" "start" "-a" "9fca77d817025e9a095abd3a45fda12001c7c3255a17c57aaf2299760865809a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9fca77d817025e9a095abd3a45fda12001c7c3255a17c57aaf2299760865809a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fca77d817025e9a095abd3a45fda12001c7c3255a17c57aaf2299760865809a", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 9c4875da59b6209a255cfc71888db89724794887b419ddfd4ec38f92194239ed
[INFO] running `Command { std: "docker" "start" "-a" "9c4875da59b6209a255cfc71888db89724794887b419ddfd4ec38f92194239ed", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
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[INFO] [stderr]    Compiling proc-macro-crate v1.0.0
[INFO] [stderr]    Compiling parity-scale-codec-derive v2.2.0
[INFO] [stderr]     Checking zstd v0.9.0+zstd.1.5.0
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking parity-scale-codec v2.2.0
[INFO] [stderr]     Checking data_model v0.1.0 (/opt/rustwide/workdir/data_model)
[INFO] [stderr]  Documenting data_model v0.1.0 (/opt/rustwide/workdir/data_model)
[INFO] [stderr]  Documenting example_smartcontract v0.1.0 (/opt/rustwide/workdir/example_smartcontract)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> example_smartcontract/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_intrinsics, lang_items, alloc_error_handler)]
[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 `example_smartcontract`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type cdylib --crate-name example_smartcontract example_smartcontract/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4ac15df88e26db37 -L dependency=/opt/rustwide/target/debug/deps --extern data_model=/opt/rustwide/target/debug/deps/libdata_model-1873b0d3ee4f1733.rmeta --extern parity_scale_codec=/opt/rustwide/target/debug/deps/libparity_scale_codec-17bf3848b54f24b4.rmeta --extern wee_alloc=/opt/rustwide/target/debug/deps/libwee_alloc-9b3f6e65922c3bee.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9c4875da59b6209a255cfc71888db89724794887b419ddfd4ec38f92194239ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c4875da59b6209a255cfc71888db89724794887b419ddfd4ec38f92194239ed", kill_on_drop: false }`
[INFO] [stdout] 9c4875da59b6209a255cfc71888db89724794887b419ddfd4ec38f92194239ed