[INFO] fetching crate osqp-rust 0.6.2...
[INFO] testing osqp-rust-0.6.2 against 1.95.0 for beta-1.96-2
[INFO] extracting crate osqp-rust 0.6.2 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate osqp-rust 0.6.2
[INFO] finished tweaking crates.io crate osqp-rust 0.6.2
[INFO] tweaked toml for crates.io crate osqp-rust 0.6.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate osqp-rust 0.6.2 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 2 packages to latest compatible versions
[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 osqp-rust-sys v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] e9e3c55b1dfeea1ba0196dcc6c8c5f05ac16a01146cd5b64288d4a30d8d5fefa
[INFO] running `Command { std: "docker" "start" "-a" "e9e3c55b1dfeea1ba0196dcc6c8c5f05ac16a01146cd5b64288d4a30d8d5fefa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9e3c55b1dfeea1ba0196dcc6c8c5f05ac16a01146cd5b64288d4a30d8d5fefa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9e3c55b1dfeea1ba0196dcc6c8c5f05ac16a01146cd5b64288d4a30d8d5fefa", kill_on_drop: false }`
[INFO] [stdout] e9e3c55b1dfeea1ba0196dcc6c8c5f05ac16a01146cd5b64288d4a30d8d5fefa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 262c829c1da8df5e775409fa41eebec6078053ab81376f613171d8c3af6cae60
[INFO] running `Command { std: "docker" "start" "-a" "262c829c1da8df5e775409fa41eebec6078053ab81376f613171d8c3af6cae60", kill_on_drop: false }`
[INFO] [stderr]    Compiling osqp-rust-sys v0.6.2
[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-1949cf8c6b5b557f/osqp-rust-sys-0.6.2/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(extern_types)]
[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 `osqp-rust-sys` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "262c829c1da8df5e775409fa41eebec6078053ab81376f613171d8c3af6cae60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "262c829c1da8df5e775409fa41eebec6078053ab81376f613171d8c3af6cae60", kill_on_drop: false }`
[INFO] [stdout] 262c829c1da8df5e775409fa41eebec6078053ab81376f613171d8c3af6cae60
