[INFO] fetching crate fp-core 0.1.9...
[INFO] checking fp-core-0.1.9 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate fp-core 0.1.9 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate fp-core 0.1.9 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fp-core 0.1.9
[INFO] finished tweaking crates.io crate fp-core 0.1.9
[INFO] tweaked toml for crates.io crate fp-core 0.1.9 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e683d3893d891b872add6f4f560bef973e67b35b4f50aac9450f542f9cdd64a8
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[INFO] running `Command { std: "docker" "inspect" "e683d3893d891b872add6f4f560bef973e67b35b4f50aac9450f542f9cdd64a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e683d3893d891b872add6f4f560bef973e67b35b4f50aac9450f542f9cdd64a8", kill_on_drop: false }`
[INFO] [stdout] e683d3893d891b872add6f4f560bef973e67b35b4f50aac9450f542f9cdd64a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69f607f6d3fe7846dc2dcb315725f3a5fb4f831ac5334a81ee937e7911398aed
[INFO] running `Command { std: "docker" "start" "-a" "69f607f6d3fe7846dc2dcb315725f3a5fb4f831ac5334a81ee937e7911398aed", kill_on_drop: false }`
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking fp-core v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/apply.rs:4:47
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Applicator<B, S: HKT<B>> = <S as HKT<Box<Fn(<S as HKT<B>>::Current) -> B>>>::Target;
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(<S as HKT<B>>::Current) -> B`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/apply.rs:6:42
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait Apply<B>: Functor<B> + HKT<Box<Fn(<Self as HKT<B>>::Current) -> B>> {
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(<Self as HKT<B>>::Current) -> B`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/lens.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn over(s: &S, f: &Fn(Option<&A>) -> A) -> S {
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Option<&A>) -> A`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/monoid.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/semigroup.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/apply.rs:4:47
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Applicator<B, S: HKT<B>> = <S as HKT<Box<Fn(<S as HKT<B>>::Current) -> B>>>::Target;
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(<S as HKT<B>>::Current) -> B`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/apply.rs:6:42
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub trait Apply<B>: Functor<B> + HKT<Box<Fn(<Self as HKT<B>>::Current) -> B>> {
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(<Self as HKT<B>>::Current) -> B`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/lens.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn over(s: &S, f: &Fn(Option<&A>) -> A) -> S {
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Option<&A>) -> A`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/monoid.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/semigroup.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/empty.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn empty() -> Self {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 31 |         Vec::empty()
[INFO] [stdout]    |         ------------ recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/empty.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn empty() -> Self {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 37 |         String::empty()
[INFO] [stdout]    |         --------------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]  --> src/apply.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Applicator<B, S: HKT<B>> = <S as HKT<Box<Fn(<S as HKT<B>>::Current) -> B>>>::Target;
[INFO] [stdout]   |                       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Applicator<B, S> = <S as HKT<Box<Fn(<S as HKT<B>>::Current) -> B>>>::Target;
[INFO] [stdout]   |                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/empty.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn empty() -> Self {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 31 |         Vec::empty()
[INFO] [stdout]    |         ------------ recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/empty.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn empty() -> Self {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^ cannot return without recursing
[INFO] [stdout] 37 |         String::empty()
[INFO] [stdout]    |         --------------- recursive call site
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]  --> src/apply.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Applicator<B, S: HKT<B>> = <S as HKT<Box<Fn(<S as HKT<B>>::Current) -> B>>>::Target;
[INFO] [stdout]   |                       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Applicator<B, S> = <S as HKT<Box<Fn(<S as HKT<B>>::Current) -> B>>>::Target;
[INFO] [stdout]   |                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "69f607f6d3fe7846dc2dcb315725f3a5fb4f831ac5334a81ee937e7911398aed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69f607f6d3fe7846dc2dcb315725f3a5fb4f831ac5334a81ee937e7911398aed", kill_on_drop: false }`
[INFO] [stdout] 69f607f6d3fe7846dc2dcb315725f3a5fb4f831ac5334a81ee937e7911398aed