[INFO] fetching crate pn-sign 0.2.0...
[INFO] documenting pn-sign-0.2.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate pn-sign 0.2.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate pn-sign 0.2.0 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 pn-sign 0.2.0
[INFO] finished tweaking crates.io crate pn-sign 0.2.0
[INFO] tweaked toml for crates.io crate pn-sign 0.2.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate pn-sign 0.2.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] a732eaa0e5e4b95de5a7f0bc662728a7cb747bfedec123aad1534fced6ac8923
[INFO] running `Command { std: "docker" "start" "-a" "a732eaa0e5e4b95de5a7f0bc662728a7cb747bfedec123aad1534fced6ac8923", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a732eaa0e5e4b95de5a7f0bc662728a7cb747bfedec123aad1534fced6ac8923", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a732eaa0e5e4b95de5a7f0bc662728a7cb747bfedec123aad1534fced6ac8923", kill_on_drop: false }`
[INFO] [stdout] a732eaa0e5e4b95de5a7f0bc662728a7cb747bfedec123aad1534fced6ac8923
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] b821a67a61178e45fcb236f0823e0cece06eeb2dea8ce5b3049c03a094452438
[INFO] running `Command { std: "docker" "start" "-a" "b821a67a61178e45fcb236f0823e0cece06eeb2dea8ce5b3049c03a094452438", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling semver v1.0.0
[INFO] [stderr]     Checking cpufeatures v0.1.4
[INFO] [stderr]     Checking subtle v2.4.0
[INFO] [stderr]     Checking shell-escape v0.1.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]    Compiling tinyvec v1.2.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.5
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]     Checking sha-1 v0.9.6
[INFO] [stderr]     Checking sha2 v0.9.5
[INFO] [stderr]     Checking crypto-mac v0.11.0
[INFO] [stderr]     Checking hmac v0.11.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling unicode-normalization v0.1.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]    Compiling jobserver v0.1.22
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]     Checking headers v0.3.4
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling libgit2-sys v0.12.21+1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling git2 v0.13.20
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling cargo-lock v7.0.0
[INFO] [stderr]    Compiling built v0.5.1
[INFO] [stderr]    Compiling pn-sign v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting pn-sign v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(backtrace)]
[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 `pn-sign`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name pn_sign src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="log-level-info"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-ed234740686b5bee.rmeta --extern base64=/opt/rustwide/target/debug/deps/libbase64-06135271d248c171.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-7b9084f8ae89ce82.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-5ddd83b9787bdde2.rmeta --extern headers=/opt/rustwide/target/debug/deps/libheaders-4e809572f63fd1d0.rmeta --extern hmac=/opt/rustwide/target/debug/deps/libhmac-5529103aabb2d2e8.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-2bf50ad5f6e5bd19.rmeta --extern percent_encoding=/opt/rustwide/target/debug/deps/libpercent_encoding-ede8fd58102f5c41.rmeta --extern pretty_env_logger=/opt/rustwide/target/debug/deps/libpretty_env_logger-5c3dd10affeb8cfc.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-4e01a360c9a60a8c.rmeta --extern shell_escape=/opt/rustwide/target/debug/deps/libshell_escape-9ce62a9bb5992219.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-eaeb7cb22dfaf0a1.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-9593515e2f25ac62.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-55dee8776824d991.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b821a67a61178e45fcb236f0823e0cece06eeb2dea8ce5b3049c03a094452438", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b821a67a61178e45fcb236f0823e0cece06eeb2dea8ce5b3049c03a094452438", kill_on_drop: false }`
[INFO] [stdout] b821a67a61178e45fcb236f0823e0cece06eeb2dea8ce5b3049c03a094452438
