[INFO] fetching crate flat-rs 1.0.3-alpha...
[INFO] documenting flat-rs-1.0.3-alpha against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate flat-rs 1.0.3-alpha into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate flat-rs 1.0.3-alpha on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flat-rs 1.0.3-alpha
[INFO] finished tweaking crates.io crate flat-rs 1.0.3-alpha
[INFO] tweaked toml for crates.io crate flat-rs 1.0.3-alpha written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b45920adb2ed25ae26104dfc91b1db132eb69158d21f40252f9ca9ab4e585c70
[INFO] running `Command { std: "docker" "start" "-a" "b45920adb2ed25ae26104dfc91b1db132eb69158d21f40252f9ca9ab4e585c70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b45920adb2ed25ae26104dfc91b1db132eb69158d21f40252f9ca9ab4e585c70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b45920adb2ed25ae26104dfc91b1db132eb69158d21f40252f9ca9ab4e585c70", kill_on_drop: false }`
[INFO] [stdout] b45920adb2ed25ae26104dfc91b1db132eb69158d21f40252f9ca9ab4e585c70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05199cb36595c771efb1ecb0594375eb66497527d61eb086bac957bc15000145
[INFO] running `Command { std: "docker" "start" "-a" "05199cb36595c771efb1ecb0594375eb66497527d61eb086bac957bc15000145", kill_on_drop: false }`
[INFO] [stderr]     Checking anyhow v1.0.71
[INFO] [stderr]     Checking thiserror v1.0.40
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/thiserror-1.0.40/src/lib.rs:239:34
[INFO] [stdout]     |
[INFO] [stdout] 239 | #![cfg_attr(provide_any, feature(provide_any))]
[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 compile `thiserror` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "05199cb36595c771efb1ecb0594375eb66497527d61eb086bac957bc15000145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05199cb36595c771efb1ecb0594375eb66497527d61eb086bac957bc15000145", kill_on_drop: false }`
[INFO] [stdout] 05199cb36595c771efb1ecb0594375eb66497527d61eb086bac957bc15000145
