[INFO] fetching crate drone-stm32 0.8.3...
[INFO] testing drone-stm32-0.8.3 against 1.75.0 for beta-1.76-1
[INFO] extracting crate drone-stm32 0.8.3 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate drone-stm32 0.8.3 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] removed /workspace/builds/worker-7-tc1/source/.cargo/config
[INFO] removed /workspace/builds/worker-7-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate drone-stm32 0.8.3
[INFO] finished tweaking crates.io crate drone-stm32 0.8.3
[INFO] tweaked toml for crates.io crate drone-stm32 0.8.3 written to /workspace/builds/worker-7-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 xml-rs v0.3.6
[INFO] [stderr]   Downloaded if_chain v0.1.3
[INFO] [stderr]   Downloaded failure_derive v0.1.1
[INFO] [stderr]   Downloaded drone-macros-core v0.8.3
[INFO] [stderr]   Downloaded drone-stm32-svd v0.8.3
[INFO] [stderr]   Downloaded drone-ctypes v0.8.3
[INFO] [stderr]   Downloaded drone-stm32-macros v0.8.3
[INFO] [stderr]   Downloaded drone-core-macros v0.8.3
[INFO] [stderr]   Downloaded synstructure v0.6.1
[INFO] [stderr]   Downloaded serde-xml-rs v0.2.1
[INFO] [stderr]   Downloaded drone-core v0.8.3
[INFO] [stderr]   Downloaded failure v0.1.1
[INFO] [stderr]   Downloaded drone-mirror-failure v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] eaa0282f1683245c2fbeaea1e9579c43df204d74d3f00752192b8ca3905e44c5
[INFO] running `Command { std: "docker" "start" "-a" "eaa0282f1683245c2fbeaea1e9579c43df204d74d3f00752192b8ca3905e44c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eaa0282f1683245c2fbeaea1e9579c43df204d74d3f00752192b8ca3905e44c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eaa0282f1683245c2fbeaea1e9579c43df204d74d3f00752192b8ca3905e44c5", kill_on_drop: false }`
[INFO] [stdout] eaa0282f1683245c2fbeaea1e9579c43df204d74d3f00752192b8ca3905e44c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 508a0acc79000d4e4dfae2cdd6ac4cb19d18d11c11c940c8c0b414f426d9fe55
[INFO] running `Command { std: "docker" "start" "-a" "508a0acc79000d4e4dfae2cdd6ac4cb19d18d11c11c940c8c0b414f426d9fe55", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.1
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling futures-core-preview v0.2.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling proc-macro2 v1.0.75
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling gimli v0.28.1
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.23
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling miniz_oxide v0.7.1
[INFO] [stderr]    Compiling futures-channel-preview v0.2.2
[INFO] [stderr]    Compiling futures-io-preview v0.2.2
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling futures-sink-preview v0.2.2
[INFO] [stderr]    Compiling xml-rs v0.3.6
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling if_chain v0.1.3
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling futures-util-preview v0.2.2
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling drone-ctypes v0.8.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling object v0.32.2
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling futures-executor-preview v0.2.2
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling futures-stable-preview v0.2.3
[INFO] [stderr]    Compiling futures-async-runtime-preview v0.2.3
[INFO] [stderr]    Compiling futures-preview v0.2.2
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling backtrace v0.3.69
[INFO] [stderr]    Compiling regex-automata v0.4.3
[INFO] [stderr]    Compiling addr2line v0.21.0
[INFO] [stderr]    Compiling serde_derive v1.0.194
[INFO] [stderr]    Compiling serde-xml-rs v0.2.1
[INFO] [stderr]    Compiling regex v1.10.2
[INFO] [stderr]    Compiling drone-mirror-failure v0.1.1
[INFO] [stderr]    Compiling drone-macros-core v0.8.3
[INFO] [stderr]    Compiling Inflector v0.11.4
[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/drone-macros-core-0.8.3/src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(proc_macro_diagnostic)]
[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 `drone-macros-core` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "508a0acc79000d4e4dfae2cdd6ac4cb19d18d11c11c940c8c0b414f426d9fe55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "508a0acc79000d4e4dfae2cdd6ac4cb19d18d11c11c940c8c0b414f426d9fe55", kill_on_drop: false }`
[INFO] [stdout] 508a0acc79000d4e4dfae2cdd6ac4cb19d18d11c11c940c8c0b414f426d9fe55
