[INFO] fetching crate pyo3-helper-macros 0.0.6...
[INFO] testing pyo3-helper-macros-0.0.6 against 1.95.0 for beta-1.96-2
[INFO] extracting crate pyo3-helper-macros 0.0.6 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate pyo3-helper-macros 0.0.6
[INFO] finished tweaking crates.io crate pyo3-helper-macros 0.0.6
[INFO] tweaked toml for crates.io crate pyo3-helper-macros 0.0.6 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate pyo3-helper-macros 0.0.6 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 69 packages to latest compatible versions
[INFO] [stderr]       Adding pyo3 v0.20.3 (available: v0.28.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uuid v1.23.1
[INFO] [stderr]   Downloaded pyo3-ffi v0.20.3
[INFO] [stderr]   Downloaded pyo3-build-config v0.20.3
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.20.3
[INFO] [stderr]   Downloaded pyo3-macros v0.20.3
[INFO] [stderr]   Downloaded pyo3 v0.20.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 430cb1508cdfe4231c0c0cbc316df61b614cc515d4a27bcf0af5b269c32f0aac
[INFO] running `Command { std: "docker" "start" "-a" "430cb1508cdfe4231c0c0cbc316df61b614cc515d4a27bcf0af5b269c32f0aac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "430cb1508cdfe4231c0c0cbc316df61b614cc515d4a27bcf0af5b269c32f0aac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "430cb1508cdfe4231c0c0cbc316df61b614cc515d4a27bcf0af5b269c32f0aac", kill_on_drop: false }`
[INFO] [stdout] 430cb1508cdfe4231c0c0cbc316df61b614cc515d4a27bcf0af5b269c32f0aac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd536d5417dc9d48c8c63297d7368431b8bdedbe3521aa3b052f5d79631615cf
[INFO] running `Command { std: "docker" "start" "-a" "dd536d5417dc9d48c8c63297d7368431b8bdedbe3521aa3b052f5d79631615cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling cfg-if v1.0.4
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling uuid v1.23.1
[INFO] [stderr]    Compiling pyo3-helper-macros v0.0.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pyo3-helper-macros` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "dd536d5417dc9d48c8c63297d7368431b8bdedbe3521aa3b052f5d79631615cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd536d5417dc9d48c8c63297d7368431b8bdedbe3521aa3b052f5d79631615cf", kill_on_drop: false }`
[INFO] [stdout] dd536d5417dc9d48c8c63297d7368431b8bdedbe3521aa3b052f5d79631615cf
