[INFO] fetching crate partial-uninit 0.1.0...
[INFO] checking partial-uninit-0.1.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate partial-uninit 0.1.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate partial-uninit 0.1.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90d6800782a9225907423389f3ef290c49d30d872674f40ef8667994cb2d2f9d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "90d6800782a9225907423389f3ef290c49d30d872674f40ef8667994cb2d2f9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90d6800782a9225907423389f3ef290c49d30d872674f40ef8667994cb2d2f9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90d6800782a9225907423389f3ef290c49d30d872674f40ef8667994cb2d2f9d", kill_on_drop: false }`
[INFO] [stdout] 90d6800782a9225907423389f3ef290c49d30d872674f40ef8667994cb2d2f9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] efbb6058af0a66ec682427d64af702b48f3e1304cc9ec15da4c1cf3a9873d9bd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "efbb6058af0a66ec682427d64af702b48f3e1304cc9ec15da4c1cf3a9873d9bd", kill_on_drop: false }`
[INFO] [stderr]     Checking partial-uninit v0.1.0 (/opt/rustwide/workdir)
[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] 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[E0599]: no method named `get_mut` found for union `MaybeUninit` in the current scope
[INFO] [stdout]    --> src/lib.rs:52:20
[INFO] [stdout]     |
[INFO] [stdout] 52  |             uninit.get_mut().b = 9;
[INFO] [stdout]     |                    ^^^^^^^ method not found in `MaybeUninit<Struct>`
[INFO] [stdout]     |
[INFO] [stdout] help: consider wrapping the receiver expression with the appropriate type
[INFO] [stdout]     |
[INFO] [stdout] 52  |             Pin::new(&mut uninit).get_mut().b = 9;
[INFO] [stdout]     |             ^^^^^^^^^^^^^       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `partial-uninit`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "efbb6058af0a66ec682427d64af702b48f3e1304cc9ec15da4c1cf3a9873d9bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efbb6058af0a66ec682427d64af702b48f3e1304cc9ec15da4c1cf3a9873d9bd", kill_on_drop: false }`
[INFO] [stdout] efbb6058af0a66ec682427d64af702b48f3e1304cc9ec15da4c1cf3a9873d9bd