[INFO] fetching crate storages 0.1.1...
[INFO] testing storages-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate storages 0.1.1 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate storages 0.1.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-15/source/rust-toolchain
[INFO] started tweaking crates.io crate storages 0.1.1
[INFO] finished tweaking crates.io crate storages 0.1.1
[INFO] tweaked toml for crates.io crate storages 0.1.1 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2cdda9836472adbec79f7d4956525497d0f5f4cc41e26b3992af0c2370d7f482
[INFO] running `Command { std: "docker" "start" "-a" "2cdda9836472adbec79f7d4956525497d0f5f4cc41e26b3992af0c2370d7f482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2cdda9836472adbec79f7d4956525497d0f5f4cc41e26b3992af0c2370d7f482", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cdda9836472adbec79f7d4956525497d0f5f4cc41e26b3992af0c2370d7f482", kill_on_drop: false }`
[INFO] [stdout] 2cdda9836472adbec79f7d4956525497d0f5f4cc41e26b3992af0c2370d7f482
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3fcff20e7b9337e644b69ff3d24bd9387e1b763f02ff0640ee8272ddae3bbc5
[INFO] running `Command { std: "docker" "start" "-a" "c3fcff20e7b9337e644b69ff3d24bd9387e1b763f02ff0640ee8272ddae3bbc5", kill_on_drop: false }`
[INFO] [stderr]    Compiling storages v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `core::alloc::AllocRef`
[INFO] [stdout]  --> src/buffer/alloc.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     alloc::{AllocError, AllocRef, Layout},
[INFO] [stdout]   |                         ^^^^^^^^ no `AllocRef` in `alloc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:5:1
[INFO] [stdout]    |
[INFO] [stdout] 5  | / #![feature(
[INFO] [stdout] 6  | |     allocator_api,
[INFO] [stdout] 7  | |     specialization,
[INFO] [stdout] 8  | |     coerce_unsized,
[INFO] [stdout] 9  | |     unsize,
[INFO] [stdout] 10 | |     min_const_generics
[INFO] [stdout] 11 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `min_const_generics` has been stable since 1.51.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / #![feature(
[INFO] [stdout] 14 | |     nonnull_slice_from_raw_parts,
[INFO] [stdout] 15 | |     int_bits_const,
[INFO] [stdout] 16 | |     slice_ptr_len,
[INFO] [stdout] 17 | |     slice_ptr_get
[INFO] [stdout] 18 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `storages` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "c3fcff20e7b9337e644b69ff3d24bd9387e1b763f02ff0640ee8272ddae3bbc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3fcff20e7b9337e644b69ff3d24bd9387e1b763f02ff0640ee8272ddae3bbc5", kill_on_drop: false }`
[INFO] [stdout] c3fcff20e7b9337e644b69ff3d24bd9387e1b763f02ff0640ee8272ddae3bbc5