[INFO] fetching crate skyline 0.1.0...
[INFO] testing skyline-0.1.0 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate skyline 0.1.0 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate skyline 0.1.0 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate skyline 0.1.0
[INFO] finished tweaking crates.io crate skyline 0.1.0
[INFO] tweaked toml for crates.io crate skyline 0.1.0 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33df24796866387d7353d5c0dd1ca0081d6a2fef6b423f71192a5b304c8007f6
[INFO] running `Command { std: "docker" "start" "-a" "33df24796866387d7353d5c0dd1ca0081d6a2fef6b423f71192a5b304c8007f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33df24796866387d7353d5c0dd1ca0081d6a2fef6b423f71192a5b304c8007f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33df24796866387d7353d5c0dd1ca0081d6a2fef6b423f71192a5b304c8007f6", kill_on_drop: false }`
[INFO] [stdout] 33df24796866387d7353d5c0dd1ca0081d6a2fef6b423f71192a5b304c8007f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50e0759965d1e3489ac5713a8c9bc7cb41df1e6182d831fbd5771fbbad87ae7a
[INFO] running `Command { std: "docker" "start" "-a" "50e0759965d1e3489ac5713a8c9bc7cb41df1e6182d831fbd5771fbbad87ae7a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc-nnsdk v0.0.1
[INFO] [stderr]    Compiling nnsdk v0.1.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling skyline_macro v0.1.0
[INFO] [stderr]    Compiling skyline v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:3:64
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(alloc_error_handler, lang_items, start, global_asm, const_generics, impl_trait_in_bindings, proc_macro_hygiene, alloc_prelude,...
[INFO] [stdout]   |                                                                ^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![feature(adt_const_params)]` and `#![feature(generic_const_exprs)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:3:80
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(alloc_error_handler, lang_items, start, global_asm, const_generics, impl_trait_in_bindings, proc_macro_hygiene, alloc_prelude,...
[INFO] [stdout]   |                                                                                ^^^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: the implementation was not maintainable, the feature may get reintroduced once the current refactorings are done
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `prelude` in `alloc`
[INFO] [stdout]   --> src/lib.rs:73:27
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub use crate::alloc::prelude::v1::*;
[INFO] [stdout]    |                           ^^^^^^^ could not find `prelude` in `alloc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `skyline` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "50e0759965d1e3489ac5713a8c9bc7cb41df1e6182d831fbd5771fbbad87ae7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50e0759965d1e3489ac5713a8c9bc7cb41df1e6182d831fbd5771fbbad87ae7a", kill_on_drop: false }`
[INFO] [stdout] 50e0759965d1e3489ac5713a8c9bc7cb41df1e6182d831fbd5771fbbad87ae7a