[INFO] fetching crate rcommunity 0.0.3...
[INFO] testing rcommunity-0.0.3 against 1.76.0 for beta-1.77-1
[INFO] extracting crate rcommunity 0.0.3 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate rcommunity 0.0.3 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rcommunity 0.0.3
[INFO] finished tweaking crates.io crate rcommunity 0.0.3
[INFO] tweaked toml for crates.io crate rcommunity 0.0.3 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rcommunity_core v0.0.3
[INFO] [stderr]   Downloaded rcommunity_macros v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7ce777f0090ed24d3261b874e0372a589b44ca02b65a35c767b2f49287aa647
[INFO] running `Command { std: "docker" "start" "-a" "a7ce777f0090ed24d3261b874e0372a589b44ca02b65a35c767b2f49287aa647", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7ce777f0090ed24d3261b874e0372a589b44ca02b65a35c767b2f49287aa647", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7ce777f0090ed24d3261b874e0372a589b44ca02b65a35c767b2f49287aa647", kill_on_drop: false }`
[INFO] [stdout] a7ce777f0090ed24d3261b874e0372a589b44ca02b65a35c767b2f49287aa647
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f18ad3c0470c5ad9c81092aa7752cef8a2c79bf61a76d391cf33e6e1d022361
[INFO] running `Command { std: "docker" "start" "-a" "4f18ad3c0470c5ad9c81092aa7752cef8a2c79bf61a76d391cf33e6e1d022361", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling uuid v1.7.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling rcommunity_macros v0.0.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling rcommunity_core v0.0.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rcommunity_core-0.0.3/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 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 `rcommunity_core` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4f18ad3c0470c5ad9c81092aa7752cef8a2c79bf61a76d391cf33e6e1d022361", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f18ad3c0470c5ad9c81092aa7752cef8a2c79bf61a76d391cf33e6e1d022361", kill_on_drop: false }`
[INFO] [stdout] 4f18ad3c0470c5ad9c81092aa7752cef8a2c79bf61a76d391cf33e6e1d022361
