[INFO] fetching crate osqp-rust-sys 0.6.2...
[INFO] testing osqp-rust-sys-0.6.2 against 1.90.0 for beta-1.91-3
[INFO] extracting crate osqp-rust-sys 0.6.2 into /workspace/builds/worker-2-tc1/source
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate osqp-rust-sys 0.6.2
[INFO] finished tweaking crates.io crate osqp-rust-sys 0.6.2
[INFO] tweaked toml for crates.io crate osqp-rust-sys 0.6.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate osqp-rust-sys 0.6.2 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate osqp-rust-sys 0.6.2 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd454c10ba1e68ab650bfa8230915d71f25d194c9c94603d458256c8c53f34bd
[INFO] running `Command { std: "docker" "start" "-a" "dd454c10ba1e68ab650bfa8230915d71f25d194c9c94603d458256c8c53f34bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd454c10ba1e68ab650bfa8230915d71f25d194c9c94603d458256c8c53f34bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd454c10ba1e68ab650bfa8230915d71f25d194c9c94603d458256c8c53f34bd", kill_on_drop: false }`
[INFO] [stdout] dd454c10ba1e68ab650bfa8230915d71f25d194c9c94603d458256c8c53f34bd
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 707cd22cfef1406cd1c52705367b960c5ebe4ea607d8e7a1dc77b810d8f0647c
[INFO] running `Command { std: "docker" "start" "-a" "707cd22cfef1406cd1c52705367b960c5ebe4ea607d8e7a1dc77b810d8f0647c", kill_on_drop: false }`
[INFO] [stderr]    Compiling osqp-rust-sys v0.6.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(extern_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(linkage)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(register_tool)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on externally exported functions
[INFO] [stdout]   --> src64/lin_sys/lib_handler.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | #[inline]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: externally exported functions are functions with `#[no_mangle]`, `#[export_name]`, or `#[linkage]`
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on externally exported functions
[INFO] [stdout]   --> src64/lin_sys/lib_handler.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | #[inline]
[INFO] [stdout]    | ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: externally exported functions are functions with `#[no_mangle]`, `#[export_name]`, or `#[linkage]`
[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 3 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "707cd22cfef1406cd1c52705367b960c5ebe4ea607d8e7a1dc77b810d8f0647c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "707cd22cfef1406cd1c52705367b960c5ebe4ea607d8e7a1dc77b810d8f0647c", kill_on_drop: false }`
[INFO] [stdout] 707cd22cfef1406cd1c52705367b960c5ebe4ea607d8e7a1dc77b810d8f0647c