[INFO] cloning repository https://github.com/csharad/papito
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/csharad/papito" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcsharad%2Fpapito", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcsharad%2Fpapito'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09beb223bf00cf303568c298346023858a62def6
[INFO] documenting csharad/papito 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%2Fcsharad%2Fpapito" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/csharad/papito 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/csharad/papito
[INFO] finished tweaking git repo https://github.com/csharad/papito
[INFO] tweaked toml for git repo https://github.com/csharad/papito written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/csharad/papito 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 crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-traits v0.2.1
[INFO] [stderr]   Downloaded futures v0.1.18
[INFO] [stderr]   Downloaded stdweb-derive v0.4.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.2.0
[INFO] [stderr]   Downloaded stdweb-internal-macros v0.1.0
[INFO] [stderr]   Downloaded indexmap v1.0.0
[INFO] [stderr]   Downloaded base-x v0.2.2
[INFO] [stderr]   Downloaded serde v1.0.33
[INFO] [stderr]   Downloaded serde_derive v1.0.33
[INFO] [stderr]   Downloaded serde_json v1.0.11
[INFO] [stderr]   Downloaded stdweb v0.4.2
[INFO] [stderr]   Downloaded serde_derive_internals v0.21.0
[INFO] [stderr]   Downloaded papito_dom v0.1.1
[INFO] [stderr]   Downloaded papito v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 4a810fa67fa128bc87aaba911df0afae0b67c26c6f509960b4df2b9bfd4e099f
[INFO] running `Command { std: "docker" "start" "-a" "4a810fa67fa128bc87aaba911df0afae0b67c26c6f509960b4df2b9bfd4e099f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a810fa67fa128bc87aaba911df0afae0b67c26c6f509960b4df2b9bfd4e099f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a810fa67fa128bc87aaba911df0afae0b67c26c6f509960b4df2b9bfd4e099f", kill_on_drop: false }`
[INFO] [stdout] 4a810fa67fa128bc87aaba911df0afae0b67c26c6f509960b4df2b9bfd4e099f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 8d287c0f30d50224445b4171e7e278a86baf4858586f244e41dbc0c2cd443fe2
[INFO] running `Command { std: "docker" "start" "-a" "8d287c0f30d50224445b4171e7e278a86baf4858586f244e41dbc0c2cd443fe2", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]    Compiling serde v1.0.33
[INFO] [stderr]    Compiling stdweb v0.4.2
[INFO] [stderr]     Checking num-traits v0.2.1
[INFO] [stderr]     Checking futures v0.1.18
[INFO] [stderr]     Checking indexmap v1.0.0
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]     Checking heck v0.3.0
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]     Checking serde_json v1.0.11
[INFO] [stderr]    Compiling serde_derive_internals v0.21.0
[INFO] [stderr]  Documenting papito_codegen v0.1.1 (/opt/rustwide/workdir/papito_codegen)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> papito_codegen/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[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 `papito_codegen`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type proc-macro --crate-name papito_codegen papito_codegen/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4fa90132edbbe74a -L dependency=/opt/rustwide/target/debug/deps --extern heck=/opt/rustwide/target/debug/deps/libheck-7b0b131c8f6cb2e9.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-ab51c7fe78019919.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-9f3e62f6650c2201.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-451cb72a5efcc128.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8d287c0f30d50224445b4171e7e278a86baf4858586f244e41dbc0c2cd443fe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d287c0f30d50224445b4171e7e278a86baf4858586f244e41dbc0c2cd443fe2", kill_on_drop: false }`
[INFO] [stdout] 8d287c0f30d50224445b4171e7e278a86baf4858586f244e41dbc0c2cd443fe2