[INFO] fetching crate atter 0.1.1...
[INFO] documenting atter-0.1.1 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate atter 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate atter 0.1.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate atter 0.1.1
[INFO] finished tweaking crates.io crate atter 0.1.1
[INFO] tweaked toml for crates.io crate atter 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uuid v0.6.5
[INFO] [stderr]   Downloaded error-chain v0.12.4
[INFO] [stderr]   Downloaded getset v0.1.2
[INFO] [stderr]   Downloaded fallible-streaming-iterator v0.1.9
[INFO] [stderr]   Downloaded ucd-util v0.1.10
[INFO] [stderr]   Downloaded aho-corasick v0.6.10
[INFO] [stderr]   Downloaded utf8-ranges v1.0.5
[INFO] [stderr]   Downloaded thread_local v0.3.6
[INFO] [stderr]   Downloaded fallible-iterator v0.3.0
[INFO] [stderr]   Downloaded rusqlite v0.30.0
[INFO] [stderr]   Downloaded regex v0.2.11
[INFO] [stderr]   Downloaded regex-syntax v0.5.6
[INFO] [stderr]   Downloaded libsqlite3-sys v0.27.0
[INFO] [stderr]   Downloaded bincode v0.9.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7e4c1f4a52b8e7c5f72dd8a3063cfed92c897c86b43d7602b0ae8b5d0cdd67a
[INFO] running `Command { std: "docker" "start" "-a" "e7e4c1f4a52b8e7c5f72dd8a3063cfed92c897c86b43d7602b0ae8b5d0cdd67a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7e4c1f4a52b8e7c5f72dd8a3063cfed92c897c86b43d7602b0ae8b5d0cdd67a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7e4c1f4a52b8e7c5f72dd8a3063cfed92c897c86b43d7602b0ae8b5d0cdd67a", kill_on_drop: false }`
[INFO] [stdout] e7e4c1f4a52b8e7c5f72dd8a3063cfed92c897c86b43d7602b0ae8b5d0cdd67a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 364a137a682d87815f7036efc2852bada07c392edc9a8792e8715143e413bd53
[INFO] running `Command { std: "docker" "start" "-a" "364a137a682d87815f7036efc2852bada07c392edc9a8792e8715143e413bd53", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling libsqlite3-sys v0.27.0
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking ucd-util v0.1.10
[INFO] [stderr]     Checking winnow v0.6.1
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking fallible-iterator v0.3.0
[INFO] [stderr]     Checking sha1 v0.6.1
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking utf8-ranges v1.0.5
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking rusqlite v0.30.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling backtrace v0.3.69
[INFO] [stderr]     Checking toml_edit v0.22.5
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling getset v0.1.2
[INFO] [stderr]     Checking toml v0.8.10
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]  Documenting atter v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:279:12
[INFO] [stdout]     |
[INFO] [stdout] 279 | #![feature(try_from)]
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 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 `atter`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --crate-type lib --crate-name atter src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e6851a9eef8d00bc -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-2e3e3c9121c301ad.rmeta --extern error_chain=/opt/rustwide/target/debug/deps/liberror_chain-2d152a692be55076.rmeta --extern getset=/opt/rustwide/target/debug/deps/libgetset-41ea16aa2f82151f.so --extern regex=/opt/rustwide/target/debug/deps/libregex-32c34a65fd2375e2.rmeta --extern rusqlite=/opt/rustwide/target/debug/deps/librusqlite-f79d8c5faf3ec2f1.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-08aa3493627b02f1.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-e60198f924f79d46.so --extern toml=/opt/rustwide/target/debug/deps/libtoml-b60b0028670d4793.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-46722e515e7ec667.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-e6b56b853cef6286.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "364a137a682d87815f7036efc2852bada07c392edc9a8792e8715143e413bd53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "364a137a682d87815f7036efc2852bada07c392edc9a8792e8715143e413bd53", kill_on_drop: false }`
[INFO] [stdout] 364a137a682d87815f7036efc2852bada07c392edc9a8792e8715143e413bd53
