[INFO] fetching crate fcplug-rclib 0.2.1...
[INFO] testing fcplug-rclib-0.2.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate fcplug-rclib 0.2.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate fcplug-rclib 0.2.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fcplug-rclib 0.2.1
[INFO] finished tweaking crates.io crate fcplug-rclib 0.2.1
[INFO] tweaked toml for crates.io crate fcplug-rclib 0.2.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded flatc-rust v0.2.0
[INFO] [stderr]   Downloaded fcplug-build v0.2.4
[INFO] [stderr]   Downloaded defer-lite v1.0.0
[INFO] [stderr]   Downloaded fcplug-macros v0.2.4
[INFO] [stderr]   Downloaded cbindgen v0.24.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99957948758f838b54ef4ab11f326143afd7b066825fd0fc7c14439b4bcdbd9f
[INFO] running `Command { std: "docker" "start" "-a" "99957948758f838b54ef4ab11f326143afd7b066825fd0fc7c14439b4bcdbd9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99957948758f838b54ef4ab11f326143afd7b066825fd0fc7c14439b4bcdbd9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99957948758f838b54ef4ab11f326143afd7b066825fd0fc7c14439b4bcdbd9f", kill_on_drop: false }`
[INFO] [stdout] 99957948758f838b54ef4ab11f326143afd7b066825fd0fc7c14439b4bcdbd9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 32ea6e569894735a5b97da421cb5ded9655595b1b6cd8c0671b3afba135579e0
[INFO] running `Command { std: "docker" "start" "-a" "32ea6e569894735a5b97da421cb5ded9655595b1b6cd8c0671b3afba135579e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling linux-raw-sys v0.4.12
[INFO] [stderr]    Compiling bitflags v2.4.1
[INFO] [stderr]    Compiling protobuf v2.28.0
[INFO] [stderr]    Compiling fastrand v2.0.1
[INFO] [stderr]    Compiling rustix v0.38.28
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling os_str_bytes v6.6.1
[INFO] [stderr]    Compiling home v0.5.9
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling semver v1.0.21
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling ryu v1.0.16
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stderr]    Compiling termcolor v1.4.0
[INFO] [stderr]    Compiling cbindgen v0.24.5
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling crossbeam-utils v0.8.18
[INFO] [stderr]    Compiling flatc-rust v0.2.0
[INFO] [stderr]    Compiling overload v0.1.1
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling powerfmt v0.2.0
[INFO] [stderr]    Compiling nu-ansi-term v0.46.0
[INFO] [stderr]    Compiling thread_local v1.1.7
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling fcplug-macros v0.2.4
[INFO] [stderr]    Compiling deranged v0.3.11
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling defer-lite v1.0.0
[INFO] [stderr]    Compiling flatbuffers v23.5.26
[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/fcplug-macros-0.2.4/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling clap v3.2.25
[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]    Compiling crossbeam-channel v0.5.10
[INFO] [stderr] error: could not compile `fcplug-macros` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "32ea6e569894735a5b97da421cb5ded9655595b1b6cd8c0671b3afba135579e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32ea6e569894735a5b97da421cb5ded9655595b1b6cd8c0671b3afba135579e0", kill_on_drop: false }`
[INFO] [stdout] 32ea6e569894735a5b97da421cb5ded9655595b1b6cd8c0671b3afba135579e0
