[INFO] cloning repository https://github.com/bochaco/error-chain-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bochaco/error-chain-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbochaco%2Ferror-chain-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbochaco%2Ferror-chain-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b1349117579da4c2d3ca1267521599f5489e1f52
[INFO] documenting bochaco/error-chain-test 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%2Fbochaco%2Ferror-chain-test" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bochaco/error-chain-test 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/bochaco/error-chain-test
[INFO] finished tweaking git repo https://github.com/bochaco/error-chain-test
[INFO] tweaked toml for git repo https://github.com/bochaco/error-chain-test written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/bochaco/error-chain-test 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 9ea7c57928a09774d04849bd99106d58fbdc04a9ef74f7c75ab33566e4b20abb
[INFO] running `Command { std: "docker" "start" "-a" "9ea7c57928a09774d04849bd99106d58fbdc04a9ef74f7c75ab33566e4b20abb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ea7c57928a09774d04849bd99106d58fbdc04a9ef74f7c75ab33566e4b20abb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ea7c57928a09774d04849bd99106d58fbdc04a9ef74f7c75ab33566e4b20abb", kill_on_drop: false }`
[INFO] [stdout] 9ea7c57928a09774d04849bd99106d58fbdc04a9ef74f7c75ab33566e4b20abb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bf6677f2e3443a5137a6c0b3fc7108154a47011210feb4f50157abe0b90e28a7
[INFO] running `Command { std: "docker" "start" "-a" "bf6677f2e3443a5137a6c0b3fc7108154a47011210feb4f50157abe0b90e28a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.56
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling anyhow v1.0.37
[INFO] [stderr]     Checking bytes v1.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]     Checking serde_json v1.0.61
[INFO] [stderr]     Checking thiserror v1.0.23
[INFO] [stderr]  Documenting error-chains 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(backtrace)]
[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 `error-chains`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name error_chains src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=47f9bdfa4e987514 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-59327496a5147013.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-8494520401600fad.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-f27f75d7b8fa8231.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-668e249beb91faa9.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "bf6677f2e3443a5137a6c0b3fc7108154a47011210feb4f50157abe0b90e28a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf6677f2e3443a5137a6c0b3fc7108154a47011210feb4f50157abe0b90e28a7", kill_on_drop: false }`
[INFO] [stdout] bf6677f2e3443a5137a6c0b3fc7108154a47011210feb4f50157abe0b90e28a7