[INFO] fetching crate awint_core 0.4.0...
[INFO] testing awint_core-0.4.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate awint_core 0.4.0 into /workspace/builds/worker-48/source
[INFO] validating manifest of crates.io crate awint_core 0.4.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate awint_core 0.4.0
[INFO] finished tweaking crates.io crate awint_core 0.4.0
[INFO] tweaked toml for crates.io crate awint_core 0.4.0 written to /workspace/builds/worker-48/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_xoshiro v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ca7c82a6c7be1d11873308e003c9c59d03aa23e9d4b5858bbe2698e196fbdf7
[INFO] running `Command { std: "docker" "start" "-a" "5ca7c82a6c7be1d11873308e003c9c59d03aa23e9d4b5858bbe2698e196fbdf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ca7c82a6c7be1d11873308e003c9c59d03aa23e9d4b5858bbe2698e196fbdf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ca7c82a6c7be1d11873308e003c9c59d03aa23e9d4b5858bbe2698e196fbdf7", kill_on_drop: false }`
[INFO] [stdout] 5ca7c82a6c7be1d11873308e003c9c59d03aa23e9d4b5858bbe2698e196fbdf7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ffca55d347c708f0b3d7940bb8402ba7c4a5b6db93cc6cdeffa47382964d7e7
[INFO] running `Command { std: "docker" "start" "-a" "6ffca55d347c708f0b3d7940bb8402ba7c4a5b6db93cc6cdeffa47382964d7e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling const_fn v0.4.9
[INFO] [stderr]    Compiling awint_internals v0.4.0
[INFO] [stderr]    Compiling awint_core v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature = "const_support", feature(const_maybe_uninit_as_mut_ptr))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:40
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![cfg_attr(feature = "const_support", feature(const_mut_refs))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:14:40
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![cfg_attr(feature = "const_support", feature(const_ptr_read))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:40
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![cfg_attr(feature = "const_support", feature(const_ptr_write))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:40
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![cfg_attr(feature = "const_support", feature(const_intrinsic_copy))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:17:40
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![cfg_attr(feature = "const_support", feature(const_slice_from_raw_parts))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:18:40
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![cfg_attr(feature = "const_support", feature(const_swap))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:19:40
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(feature = "const_support", feature(const_option))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `awint_core` due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "6ffca55d347c708f0b3d7940bb8402ba7c4a5b6db93cc6cdeffa47382964d7e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ffca55d347c708f0b3d7940bb8402ba7c4a5b6db93cc6cdeffa47382964d7e7", kill_on_drop: false }`
[INFO] [stdout] 6ffca55d347c708f0b3d7940bb8402ba7c4a5b6db93cc6cdeffa47382964d7e7