[INFO] fetching crate partial-uninit 0.1.0...
[INFO] testing partial-uninit-0.1.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate partial-uninit 0.1.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate partial-uninit 0.1.0 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 partial-uninit 0.1.0
[INFO] finished tweaking crates.io crate partial-uninit 0.1.0
[INFO] tweaked toml for crates.io crate partial-uninit 0.1.0 written to /workspace/builds/worker-15/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] 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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2f2244516bc4c9172d8d4adf05eb239c20da99eb18dba6acbb064b97c83afb6
[INFO] running `Command { std: "docker" "start" "-a" "d2f2244516bc4c9172d8d4adf05eb239c20da99eb18dba6acbb064b97c83afb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2f2244516bc4c9172d8d4adf05eb239c20da99eb18dba6acbb064b97c83afb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2f2244516bc4c9172d8d4adf05eb239c20da99eb18dba6acbb064b97c83afb6", kill_on_drop: false }`
[INFO] [stdout] d2f2244516bc4c9172d8d4adf05eb239c20da99eb18dba6acbb064b97c83afb6
[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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 755c59ab4fcc3ec8fe6959ce3cf7335c28958fb2fc88251c8a89309791f1cd34
[INFO] running `Command { std: "docker" "start" "-a" "755c59ab4fcc3ec8fe6959ce3cf7335c28958fb2fc88251c8a89309791f1cd34", kill_on_drop: false }`
[INFO] [stderr]    Compiling partial-uninit v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(maybe_uninit_ref)]
[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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(new_uninit)]
[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:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `get_mut` found for union `MaybeUninit` in the current scope
[INFO] [stdout]    --> src/lib.rs:12:20
[INFO] [stdout]     |
[INFO] [stdout] 12  |             uninit.get_mut().partial_init();
[INFO] [stdout]     |                    ^^^^^^^ method not found in `MaybeUninit<Self>`
[INFO] [stdout]     |
[INFO] [stdout] help: consider wrapping the receiver expression with the appropriate type
[INFO] [stdout]     |
[INFO] [stdout] 12  |             Pin::new(&mut uninit).get_mut().partial_init();
[INFO] [stdout]     |             +++++++++++++       +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `get_mut` found for struct `Box<MaybeUninit<Self>>` in the current scope
[INFO] [stdout]    --> src/lib.rs:20:20
[INFO] [stdout]     |
[INFO] [stdout] 20  |             uninit.get_mut().partial_init();
[INFO] [stdout]     |                    ^^^^^^^ method not found in `Box<MaybeUninit<Self>>`
[INFO] [stdout]     |
[INFO] [stdout] help: consider wrapping the receiver expression with the appropriate type
[INFO] [stdout]     |
[INFO] [stdout] 20  |             Pin::new(&mut uninit).get_mut().partial_init();
[INFO] [stdout]     |             +++++++++++++       +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `partial-uninit` due to 6 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "755c59ab4fcc3ec8fe6959ce3cf7335c28958fb2fc88251c8a89309791f1cd34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "755c59ab4fcc3ec8fe6959ce3cf7335c28958fb2fc88251c8a89309791f1cd34", kill_on_drop: false }`
[INFO] [stdout] 755c59ab4fcc3ec8fe6959ce3cf7335c28958fb2fc88251c8a89309791f1cd34