[INFO] fetching crate tuple-combinator 0.2.1...
[INFO] checking tuple-combinator-0.2.1 against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] extracting crate tuple-combinator 0.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate tuple-combinator 0.2.1 on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tuple-combinator 0.2.1
[INFO] finished tweaking crates.io crate tuple-combinator 0.2.1
[INFO] tweaked toml for crates.io crate tuple-combinator 0.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b1752b49ac8dd329cebf9320cebc815fd22ce937b3af5371087a6718a79c9b6
[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" "1b1752b49ac8dd329cebf9320cebc815fd22ce937b3af5371087a6718a79c9b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b1752b49ac8dd329cebf9320cebc815fd22ce937b3af5371087a6718a79c9b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b1752b49ac8dd329cebf9320cebc815fd22ce937b3af5371087a6718a79c9b6", kill_on_drop: false }`
[INFO] [stdout] 1b1752b49ac8dd329cebf9320cebc815fd22ce937b3af5371087a6718a79c9b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd99ce0d45ada4cc0a10c36cf7d79273908e1e82c9025a0effc8ca369a62faa2
[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" "dd99ce0d45ada4cc0a10c36cf7d79273908e1e82c9025a0effc8ca369a62faa2", kill_on_drop: false }`
[INFO] [stderr]     Checking tuple-combinator v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this attribute can only be applied to a `use` item
[INFO] [stdout]    --> src/lib.rs:23:7
[INFO] [stdout]     |
[INFO] [stdout] 23  |   #[doc(inline)]
[INFO] [stdout]     |         ^^^^^^ only applicable on `use` items
[INFO] [stdout] 24  | / pub trait TupleCombinator: Sized {
[INFO] [stdout] 25  | |     type Tuple;
[INFO] [stdout] 26  | |
[INFO] [stdout] 27  | |     /// Transposes a tuple of [`Option`]s into an `Option` of tuples. This function returns `None`
[INFO] [stdout] ...   |
[INFO] [stdout] 160 | |     }
[INFO] [stdout] 161 | | }
[INFO] [stdout]     | |_- not a `use` item
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]     = note: read https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#docno_inlinedocinline for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this attribute can only be applied to a `use` item
[INFO] [stdout]    --> src/lib.rs:189:7
[INFO] [stdout]     |
[INFO] [stdout] 189 |   #[doc(inline)]
[INFO] [stdout]     |         ^^^^^^ only applicable on `use` items
[INFO] [stdout] 190 | / pub trait TupleReducer: Sized {
[INFO] [stdout] 191 | |     /// Fold the tuple to obtain a final outcome. Depending on the implementation of the handler
[INFO] [stdout] 192 | |     /// function, the fold can behave differently on various option types or values.
[INFO] [stdout] 193 | |     ///
[INFO] [stdout] ...   |
[INFO] [stdout] 343 | |     fn strict_mut_slice<T: Any>(&mut self) -> Box<[&mut Option<T>]>;
[INFO] [stdout] 344 | | }
[INFO] [stdout]     | |_- not a `use` item
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]     = note: read https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#docno_inlinedocinline for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this attribute can only be applied to a `use` item
[INFO] [stdout]    --> src/lib.rs:23:7
[INFO] [stdout]     |
[INFO] [stdout] 23  |   #[doc(inline)]
[INFO] [stdout]     |         ^^^^^^ only applicable on `use` items
[INFO] [stdout] 24  | / pub trait TupleCombinator: Sized {
[INFO] [stdout] 25  | |     type Tuple;
[INFO] [stdout] 26  | |
[INFO] [stdout] 27  | |     /// Transposes a tuple of [`Option`]s into an `Option` of tuples. This function returns `None`
[INFO] [stdout] ...   |
[INFO] [stdout] 160 | |     }
[INFO] [stdout] 161 | | }
[INFO] [stdout]     | |_- not a `use` item
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]     = note: read https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#docno_inlinedocinline for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this attribute can only be applied to a `use` item
[INFO] [stdout]    --> src/lib.rs:189:7
[INFO] [stdout]     |
[INFO] [stdout] 189 |   #[doc(inline)]
[INFO] [stdout]     |         ^^^^^^ only applicable on `use` items
[INFO] [stdout] 190 | / pub trait TupleReducer: Sized {
[INFO] [stdout] 191 | |     /// Fold the tuple to obtain a final outcome. Depending on the implementation of the handler
[INFO] [stdout] 192 | |     /// function, the fold can behave differently on various option types or values.
[INFO] [stdout] 193 | |     ///
[INFO] [stdout] ...   |
[INFO] [stdout] 343 | |     fn strict_mut_slice<T: Any>(&mut self) -> Box<[&mut Option<T>]>;
[INFO] [stdout] 344 | | }
[INFO] [stdout]     | |_- not a `use` item
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]     = note: read https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#docno_inlinedocinline for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "dd99ce0d45ada4cc0a10c36cf7d79273908e1e82c9025a0effc8ca369a62faa2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd99ce0d45ada4cc0a10c36cf7d79273908e1e82c9025a0effc8ca369a62faa2", kill_on_drop: false }`
[INFO] [stdout] dd99ce0d45ada4cc0a10c36cf7d79273908e1e82c9025a0effc8ca369a62faa2