[INFO] fetching crate namaste 0.23.1...
[INFO] testing namaste-0.23.1 against 1.69.0 for beta-1.70-1
[INFO] extracting crate namaste 0.23.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate namaste 0.23.1 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 namaste 0.23.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate namaste 0.23.1
[INFO] tweaked toml for crates.io crate namaste 0.23.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate namaste 0.23.1 already has a lockfile, it will not be regenerated
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded blackhole v0.20.2
[INFO] [stderr]   Downloaded zeros v16.0.2
[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] cc401746adbef6de1bb913dd0251f381c063778fb64818b8ad886f132eea76eb
[INFO] running `Command { std: "docker" "start" "-a" "cc401746adbef6de1bb913dd0251f381c063778fb64818b8ad886f132eea76eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc401746adbef6de1bb913dd0251f381c063778fb64818b8ad886f132eea76eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc401746adbef6de1bb913dd0251f381c063778fb64818b8ad886f132eea76eb", kill_on_drop: false }`
[INFO] [stdout] cc401746adbef6de1bb913dd0251f381c063778fb64818b8ad886f132eea76eb
[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" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f381ca2ee679c6fe8c935dfcffb00dc2eb6bdc35592527d3e67266f1f1d2fbf2
[INFO] running `Command { std: "docker" "start" "-a" "f381ca2ee679c6fe8c935dfcffb00dc2eb6bdc35592527d3e67266f1f1d2fbf2", kill_on_drop: false }`
[INFO] [stderr]    Compiling namaste v0.23.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:64:90
[INFO] [stdout]    |
[INFO] [stdout] 64 | #![cfg_attr(any(target_os = "linux", target_os = "l4re", target_os = "android"), feature(unix_socket_abstract), feature(tcp_quickack))]
[INFO] [stdout]    |                                                                                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:64:121
[INFO] [stdout]    |
[INFO] [stdout] 64 | #![cfg_attr(any(target_os = "linux", target_os = "l4re", target_os = "android"), feature(unix_socket_abstract), feature(tcp_quickack))]
[INFO] [stdout]    |                                                                                                                         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:65:45
[INFO] [stdout]    |
[INFO] [stdout] 65 | #![cfg_attr(target_family = "unix", feature(unix_socket_ancillary_data))]
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 compile `namaste` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "f381ca2ee679c6fe8c935dfcffb00dc2eb6bdc35592527d3e67266f1f1d2fbf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f381ca2ee679c6fe8c935dfcffb00dc2eb6bdc35592527d3e67266f1f1d2fbf2", kill_on_drop: false }`
[INFO] [stdout] f381ca2ee679c6fe8c935dfcffb00dc2eb6bdc35592527d3e67266f1f1d2fbf2
