[INFO] cloning repository https://github.com/EugenWay/VottingApp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EugenWay/VottingApp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEugenWay%2FVottingApp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEugenWay%2FVottingApp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9432b612c9b6ef462d7c3e750c1bc4c9c84f58b8
[INFO] documenting EugenWay/VottingApp 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%2FEugenWay%2FVottingApp" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EugenWay/VottingApp 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/EugenWay/VottingApp
[INFO] finished tweaking git repo https://github.com/EugenWay/VottingApp
[INFO] tweaked toml for git repo https://github.com/EugenWay/VottingApp written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/EugenWay/VottingApp 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 }`
[INFO] [stderr]     Updating git repository `https://github.com/gear-tech/gear`
[INFO] [stderr]     Updating git repository `https://github.com/gear-tech/dlmalloc-rust.git`
[INFO] [stderr]     Updating git repository `https://github.com/grishasobol/rust-libc-print.git`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded page_size v0.4.2
[INFO] [stderr]   Downloaded str-buf v2.0.4
[INFO] [stderr]   Downloaded serde v1.0.135
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 64e7dc344cc5f63a6db3182ce1f1e31a71e7cc9722db6b37b867e8b8ea8bb12e
[INFO] running `Command { std: "docker" "start" "-a" "64e7dc344cc5f63a6db3182ce1f1e31a71e7cc9722db6b37b867e8b8ea8bb12e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64e7dc344cc5f63a6db3182ce1f1e31a71e7cc9722db6b37b867e8b8ea8bb12e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64e7dc344cc5f63a6db3182ce1f1e31a71e7cc9722db6b37b867e8b8ea8bb12e", kill_on_drop: false }`
[INFO] [stdout] 64e7dc344cc5f63a6db3182ce1f1e31a71e7cc9722db6b37b867e8b8ea8bb12e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 7cd590e48a74a69fd8ed7e0f6a7899fce6e5f02f69386d7038e3f727a9adf545
[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" "7cd590e48a74a69fd8ed7e0f6a7899fce6e5f02f69386d7038e3f727a9adf545", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling serde v1.0.135
[INFO] [stderr]    Compiling libc v0.2.114
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking byte-slice-cast v1.2.0
[INFO] [stderr]     Checking futures-sink v0.3.19
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]    Compiling dlmalloc v0.1.4 (https://github.com/gear-tech/dlmalloc-rust.git?rev=703192a04d55a75899a69ca8c9f70810de421797#703192a0)
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking str-buf v2.0.4
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.19
[INFO] [stderr]     Checking gcore v0.1.0 (https://github.com/gear-tech/gear#d5bf6d9a)
[INFO] [stderr]     Checking bs58 v0.4.0
[INFO] [stderr]     Checking fixed-hash v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]     Checking uint v0.9.1
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking page_size v0.4.2
[INFO] [stderr]     Checking libc_print v0.1.16 (https://github.com/grishasobol/rust-libc-print.git#b3008048)
[INFO] [stderr]     Checking galloc v0.1.0 (https://github.com/gear-tech/gear#d5bf6d9a)
[INFO] [stderr]     Checking futures v0.3.19
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.2.1
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling gstd-codegen v0.1.0 (https://github.com/gear-tech/gear#d5bf6d9a)
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling parity-scale-codec-derive v2.3.1
[INFO] [stderr]    Compiling scale-info-derive v1.0.0
[INFO] [stderr]     Checking parity-scale-codec v2.3.1
[INFO] [stderr]     Checking scale-info v1.0.0
[INFO] [stderr]     Checking impl-codec v0.5.1
[INFO] [stderr]     Checking primitive-types v0.10.1
[INFO] [stderr]     Checking gstd v0.1.0 (https://github.com/gear-tech/gear#d5bf6d9a)
[INFO] [stderr]  Documenting voting-app 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_btree_new)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `voting-app`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type cdylib --crate-name voting_app src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b7484ab186859ef4 -L dependency=/opt/rustwide/target/debug/deps --extern gstd=/opt/rustwide/target/debug/deps/libgstd-7581d5d5611fb02d.rmeta --extern codec=/opt/rustwide/target/debug/deps/libparity_scale_codec-89be893d51d6abf6.rmeta --extern primitive_types=/opt/rustwide/target/debug/deps/libprimitive_types-6bbd0f6e4e54549b.rmeta --extern scale_info=/opt/rustwide/target/debug/deps/libscale_info-e6e3a1f7dda5840f.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7cd590e48a74a69fd8ed7e0f6a7899fce6e5f02f69386d7038e3f727a9adf545", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cd590e48a74a69fd8ed7e0f6a7899fce6e5f02f69386d7038e3f727a9adf545", kill_on_drop: false }`
[INFO] [stdout] 7cd590e48a74a69fd8ed7e0f6a7899fce6e5f02f69386d7038e3f727a9adf545