[INFO] fetching crate deferred-reference 0.1.2...
[INFO] checking deferred-reference-0.1.2 against 1.95.0 for pr-155915
[INFO] extracting crate deferred-reference 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate deferred-reference 0.1.2
[INFO] finished tweaking crates.io crate deferred-reference 0.1.2
[INFO] tweaked toml for crates.io crate deferred-reference 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate deferred-reference 0.1.2 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] 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] 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] 9c234de38db6816a88126abce99711ed856e9f960e65e74546df810653b71dec
[INFO] running `Command { std: "docker" "start" "-a" "9c234de38db6816a88126abce99711ed856e9f960e65e74546df810653b71dec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c234de38db6816a88126abce99711ed856e9f960e65e74546df810653b71dec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c234de38db6816a88126abce99711ed856e9f960e65e74546df810653b71dec", kill_on_drop: false }`
[INFO] [stdout] 9c234de38db6816a88126abce99711ed856e9f960e65e74546df810653b71dec
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a66cf3a0c43f26e4567afe0fe7d10bdc463359d46a37004b3eea83678f8ab230
[INFO] running `Command { std: "docker" "start" "-a" "a66cf3a0c43f26e4567afe0fe7d10bdc463359d46a37004b3eea83678f8ab230", kill_on_drop: false }`
[INFO] [stderr]     Checking deferred-reference v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:122:40
[INFO] [stdout]     |
[INFO] [stdout] 122 | #![cfg_attr(feature = "slice_ptr_len", feature(slice_ptr_len))]
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core_traits_impl::*`
[INFO] [stdout]    --> src/lib.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 | pub use core_traits_impl::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slice_like_impl::*`
[INFO] [stdout]    --> src/lib.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 165 | pub use slice_like_impl::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `slice_ptr_len` has been stable since 1.79.0 and no longer requires an attribute to enable
[INFO] [stdout]    --> src/lib.rs:122:48
[INFO] [stdout]     |
[INFO] [stdout] 122 | #![cfg_attr(feature = "slice_ptr_len", feature(slice_ptr_len))]
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:122:40
[INFO] [stdout]     |
[INFO] [stdout] 122 | #![cfg_attr(feature = "slice_ptr_len", feature(slice_ptr_len))]
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core_traits_impl::*`
[INFO] [stdout]    --> src/lib.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 | pub use core_traits_impl::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slice_like_impl::*`
[INFO] [stdout]    --> src/lib.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 165 | pub use slice_like_impl::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `slice_ptr_len` has been stable since 1.79.0 and no longer requires an attribute to enable
[INFO] [stdout]    --> src/lib.rs:122:48
[INFO] [stdout]     |
[INFO] [stdout] 122 | #![cfg_attr(feature = "slice_ptr_len", feature(slice_ptr_len))]
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `deferred-reference` (lib) due to 1 previous error; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `deferred-reference` (lib test) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "a66cf3a0c43f26e4567afe0fe7d10bdc463359d46a37004b3eea83678f8ab230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a66cf3a0c43f26e4567afe0fe7d10bdc463359d46a37004b3eea83678f8ab230", kill_on_drop: false }`
[INFO] [stdout] a66cf3a0c43f26e4567afe0fe7d10bdc463359d46a37004b3eea83678f8ab230
