[INFO] fetching crate ct-python 0.5.7...
[INFO] testing ct-python-0.5.7 against 1.75.0 for beta-1.76-1
[INFO] extracting crate ct-python 0.5.7 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate ct-python 0.5.7 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 ct-python 0.5.7
[INFO] finished tweaking crates.io crate ct-python 0.5.7
[INFO] tweaked toml for crates.io crate ct-python 0.5.7 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate ct-python 0.5.7 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded target-lexicon v0.12.8
[INFO] [stderr]   Downloaded instant v0.1.10
[INFO] [stderr]   Downloaded lock_api v0.4.5
[INFO] [stderr]   Downloaded inline-python-macros v0.12.0
[INFO] [stderr]   Downloaded pyo3-build-config v0.19.0
[INFO] [stderr]   Downloaded pyo3 v0.19.0
[INFO] [stderr]   Downloaded pyo3-ffi v0.19.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 44cacc903ed13a8183d95d65df2371c89fece1c5603c9e0e73a49bbc7f93383b
[INFO] running `Command { std: "docker" "start" "-a" "44cacc903ed13a8183d95d65df2371c89fece1c5603c9e0e73a49bbc7f93383b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "44cacc903ed13a8183d95d65df2371c89fece1c5603c9e0e73a49bbc7f93383b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44cacc903ed13a8183d95d65df2371c89fece1c5603c9e0e73a49bbc7f93383b", kill_on_drop: false }`
[INFO] [stdout] 44cacc903ed13a8183d95d65df2371c89fece1c5603c9e0e73a49bbc7f93383b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 270547d988fde72b54254d29495a63995db418c59103556091c8b28cd42c41fb
[INFO] running `Command { std: "docker" "start" "-a" "270547d988fde72b54254d29495a63995db418c59103556091c8b28cd42c41fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.8
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling pyo3-build-config v0.19.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling pyo3-ffi v0.19.0
[INFO] [stderr]    Compiling pyo3 v0.19.0
[INFO] [stderr]    Compiling inline-python-macros v0.12.0
[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/inline-python-macros-0.12.0/src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(proc_macro_span)]
[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 `inline-python-macros` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "270547d988fde72b54254d29495a63995db418c59103556091c8b28cd42c41fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "270547d988fde72b54254d29495a63995db418c59103556091c8b28cd42c41fb", kill_on_drop: false }`
[INFO] [stdout] 270547d988fde72b54254d29495a63995db418c59103556091c8b28cd42c41fb
