[INFO] fetching crate claap-test-dont-use 0.1.0...
[INFO] documenting claap-test-dont-use-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate claap-test-dont-use 0.1.0 into /workspace/builds/worker-62/source
[INFO] validating manifest of crates.io crate claap-test-dont-use 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 claap-test-dont-use 0.1.0
[INFO] finished tweaking crates.io crate claap-test-dont-use 0.1.0
[INFO] tweaked toml for crates.io crate claap-test-dont-use 0.1.0 written to /workspace/builds/worker-62/source/Cargo.toml
[INFO] crate crates.io crate claap-test-dont-use 0.1.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.65
[INFO] [stderr]   Downloaded libc v0.2.91
[INFO] [stderr]   Downloaded maud_htmlescape v0.17.0
[INFO] [stderr]   Downloaded maud_macros v0.22.2
[INFO] [stderr]   Downloaded maud v0.22.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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] 14c139bfc26dbee2313a08d88319ec18054f024b116a57f01adb578899eaeaca
[INFO] running `Command { std: "docker" "start" "-a" "14c139bfc26dbee2313a08d88319ec18054f024b116a57f01adb578899eaeaca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14c139bfc26dbee2313a08d88319ec18054f024b116a57f01adb578899eaeaca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14c139bfc26dbee2313a08d88319ec18054f024b116a57f01adb578899eaeaca", kill_on_drop: false }`
[INFO] [stdout] 14c139bfc26dbee2313a08d88319ec18054f024b116a57f01adb578899eaeaca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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] e22e153f332d567db09adb90962ff4e1d317b82251155fbc193f82fc00b9b384
[INFO] running `Command { std: "docker" "start" "-a" "e22e153f332d567db09adb90962ff4e1d317b82251155fbc193f82fc00b9b384", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling maud_macros v0.22.2
[INFO] [stderr]     Checking maud v0.22.2
[INFO] [stderr]  Documenting claap-test-dont-use v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[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 `claap-test-dont-use`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name claap_test_dont_use src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a50f0bc5625f80fb -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-aa01f0ccc1037881.rmeta --extern maud=/opt/rustwide/target/debug/deps/libmaud-a09e67223acfe52f.rmeta --extern pulldown_cmark=/opt/rustwide/target/debug/deps/libpulldown_cmark-f8f174bc7d5dea5c.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e22e153f332d567db09adb90962ff4e1d317b82251155fbc193f82fc00b9b384", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e22e153f332d567db09adb90962ff4e1d317b82251155fbc193f82fc00b9b384", kill_on_drop: false }`
[INFO] [stdout] e22e153f332d567db09adb90962ff4e1d317b82251155fbc193f82fc00b9b384