[INFO] fetching crate lenses 0.1.0...
[INFO] testing lenses-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate lenses 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate lenses 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lenses 0.1.0
[INFO] finished tweaking crates.io crate lenses 0.1.0
[INFO] tweaked toml for crates.io crate lenses 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52040ac141174cf67b612267c173d1f4a88cb3cdf792b44791837565a3d86b6b
[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" "52040ac141174cf67b612267c173d1f4a88cb3cdf792b44791837565a3d86b6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52040ac141174cf67b612267c173d1f4a88cb3cdf792b44791837565a3d86b6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52040ac141174cf67b612267c173d1f4a88cb3cdf792b44791837565a3d86b6b", kill_on_drop: false }`
[INFO] [stdout] 52040ac141174cf67b612267c173d1f4a88cb3cdf792b44791837565a3d86b6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f171c0175feafbc88a610e1aabd2abfc2878906644a5a614012eb29424ec9ce
[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" "0f171c0175feafbc88a610e1aabd2abfc2878906644a5a614012eb29424ec9ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling lenses v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:24:35
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn lens<'a, S, A>(getter: &'a Fn(&S) -> A, setter: &'a Fn(&S, &A) -> S) -> LensImpl<'a, S, A> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S) -> A`
[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/lens.rs:24:60
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn lens<'a, S, A>(getter: &'a Fn(&S) -> A, setter: &'a Fn(&S, &A) -> S) -> LensImpl<'a, S, A> {
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S, &A) -> S`
[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:31:38
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn compose<'a, S, A, B>(lhs: &'a Lens<S, A>, rhs: &'a Lens<A, B>) -> CompoundLensImpl<'a, S, A, B> {
[INFO] [stdout]    |                                      ^^^^^^^^^^ help: use `dyn`: `dyn Lens<S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:31:59
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn compose<'a, S, A, B>(lhs: &'a Lens<S, A>, rhs: &'a Lens<A, B>) -> CompoundLensImpl<'a, S, A, B> {
[INFO] [stdout]    |                                                           ^^^^^^^^^^ help: use `dyn`: `dyn Lens<A, 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:79:15
[INFO] [stdout]    |
[INFO] [stdout] 79 |     view: &'a Fn(&S) -> A,
[INFO] [stdout]    |               ^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S) -> 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:80:14
[INFO] [stdout]    |
[INFO] [stdout] 80 |     set: &'a Fn (&S, &A) -> S,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (&S, &A) -> S`
[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:84:14
[INFO] [stdout]    |
[INFO] [stdout] 84 |     lhs: &'a Lens<S, A>,
[INFO] [stdout]    |              ^^^^^^^^^^ help: use `dyn`: `dyn Lens<S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:85:14
[INFO] [stdout]    |
[INFO] [stdout] 85 |     rhs: &'a Lens<A, B>,
[INFO] [stdout]    |              ^^^^^^^^^^ help: use `dyn`: `dyn Lens<A, 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/mutable.rs:20:42
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct ModLensImpl<'a, 's, S, A>(&'s Fn(&'a mut S) -> &'a mut A);
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&'a mut S) -> &'a mut 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 |     lhs: &'s ModLens<'a, S, A>,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:23:14
[INFO] [stdout]    |
[INFO] [stdout] 23 |     rhs: &'s ModLens<'a, A, B>,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, A, 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/mutable.rs:38:46
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn mod_compose<'a, 's, S, A, B>(lhs: &'s ModLens<'a, S, A>, rhs: &'s ModLens<'a, A, B>) -> ModLensCompoundImpl<'a, 's, S, A, B> {
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:38:74
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn mod_compose<'a, 's, S, A, B>(lhs: &'s ModLens<'a, S, A>, rhs: &'s ModLens<'a, A, B>) -> ModLensCompoundImpl<'a, 's, S, A, B> {
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, A, 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/mutable.rs:45:43
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn mod_lens<'a, 's, S, A>(getter: &'s Fn(&'a mut S) -> &'a mut A) -> ModLensImpl<'a, 's, S, A> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&'a mut S) -> &'a mut 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: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "0f171c0175feafbc88a610e1aabd2abfc2878906644a5a614012eb29424ec9ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f171c0175feafbc88a610e1aabd2abfc2878906644a5a614012eb29424ec9ce", kill_on_drop: false }`
[INFO] [stdout] 0f171c0175feafbc88a610e1aabd2abfc2878906644a5a614012eb29424ec9ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a06eabf8dfe5cc3cd4efae61bda7fbc6a9c3921ed07a9c66cde9a565341afaaf
[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" "a06eabf8dfe5cc3cd4efae61bda7fbc6a9c3921ed07a9c66cde9a565341afaaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling lenses v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:24:35
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn lens<'a, S, A>(getter: &'a Fn(&S) -> A, setter: &'a Fn(&S, &A) -> S) -> LensImpl<'a, S, A> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S) -> A`
[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/lens.rs:24:60
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn lens<'a, S, A>(getter: &'a Fn(&S) -> A, setter: &'a Fn(&S, &A) -> S) -> LensImpl<'a, S, A> {
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S, &A) -> S`
[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:31:38
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn compose<'a, S, A, B>(lhs: &'a Lens<S, A>, rhs: &'a Lens<A, B>) -> CompoundLensImpl<'a, S, A, B> {
[INFO] [stdout]    |                                      ^^^^^^^^^^ help: use `dyn`: `dyn Lens<S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:31:59
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn compose<'a, S, A, B>(lhs: &'a Lens<S, A>, rhs: &'a Lens<A, B>) -> CompoundLensImpl<'a, S, A, B> {
[INFO] [stdout]    |                                                           ^^^^^^^^^^ help: use `dyn`: `dyn Lens<A, 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:79:15
[INFO] [stdout]    |
[INFO] [stdout] 79 |     view: &'a Fn(&S) -> A,
[INFO] [stdout]    |               ^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S) -> 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:80:14
[INFO] [stdout]    |
[INFO] [stdout] 80 |     set: &'a Fn (&S, &A) -> S,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (&S, &A) -> S`
[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:84:14
[INFO] [stdout]    |
[INFO] [stdout] 84 |     lhs: &'a Lens<S, A>,
[INFO] [stdout]    |              ^^^^^^^^^^ help: use `dyn`: `dyn Lens<S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:85:14
[INFO] [stdout]    |
[INFO] [stdout] 85 |     rhs: &'a Lens<A, B>,
[INFO] [stdout]    |              ^^^^^^^^^^ help: use `dyn`: `dyn Lens<A, 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/mutable.rs:20:42
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct ModLensImpl<'a, 's, S, A>(&'s Fn(&'a mut S) -> &'a mut A);
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&'a mut S) -> &'a mut 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 |     lhs: &'s ModLens<'a, S, A>,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:23:14
[INFO] [stdout]    |
[INFO] [stdout] 23 |     rhs: &'s ModLens<'a, A, B>,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, A, 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/mutable.rs:38:46
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn mod_compose<'a, 's, S, A, B>(lhs: &'s ModLens<'a, S, A>, rhs: &'s ModLens<'a, A, B>) -> ModLensCompoundImpl<'a, 's, S, A, B> {
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:38:74
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn mod_compose<'a, 's, S, A, B>(lhs: &'s ModLens<'a, S, A>, rhs: &'s ModLens<'a, A, B>) -> ModLensCompoundImpl<'a, 's, S, A, B> {
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, A, 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/mutable.rs:45:43
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn mod_lens<'a, 's, S, A>(getter: &'s Fn(&'a mut S) -> &'a mut A) -> ModLensImpl<'a, 's, S, A> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&'a mut S) -> &'a mut 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: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:24:35
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn lens<'a, S, A>(getter: &'a Fn(&S) -> A, setter: &'a Fn(&S, &A) -> S) -> LensImpl<'a, S, A> {
[INFO] [stdout]    |                                   ^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S) -> A`
[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/lens.rs:24:60
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn lens<'a, S, A>(getter: &'a Fn(&S) -> A, setter: &'a Fn(&S, &A) -> S) -> LensImpl<'a, S, A> {
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S, &A) -> S`
[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:31:38
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn compose<'a, S, A, B>(lhs: &'a Lens<S, A>, rhs: &'a Lens<A, B>) -> CompoundLensImpl<'a, S, A, B> {
[INFO] [stdout]    |                                      ^^^^^^^^^^ help: use `dyn`: `dyn Lens<S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:31:59
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn compose<'a, S, A, B>(lhs: &'a Lens<S, A>, rhs: &'a Lens<A, B>) -> CompoundLensImpl<'a, S, A, B> {
[INFO] [stdout]    |                                                           ^^^^^^^^^^ help: use `dyn`: `dyn Lens<A, 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:79:15
[INFO] [stdout]    |
[INFO] [stdout] 79 |     view: &'a Fn(&S) -> A,
[INFO] [stdout]    |               ^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S) -> 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:80:14
[INFO] [stdout]    |
[INFO] [stdout] 80 |     set: &'a Fn (&S, &A) -> S,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (&S, &A) -> S`
[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:84:14
[INFO] [stdout]    |
[INFO] [stdout] 84 |     lhs: &'a Lens<S, A>,
[INFO] [stdout]    |              ^^^^^^^^^^ help: use `dyn`: `dyn Lens<S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lens.rs:85:14
[INFO] [stdout]    |
[INFO] [stdout] 85 |     rhs: &'a Lens<A, B>,
[INFO] [stdout]    |              ^^^^^^^^^^ help: use `dyn`: `dyn Lens<A, 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/mutable.rs:20:42
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct ModLensImpl<'a, 's, S, A>(&'s Fn(&'a mut S) -> &'a mut A);
[INFO] [stdout]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&'a mut S) -> &'a mut 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 |     lhs: &'s ModLens<'a, S, A>,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:23:14
[INFO] [stdout]    |
[INFO] [stdout] 23 |     rhs: &'s ModLens<'a, A, B>,
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, A, 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/mutable.rs:38:46
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn mod_compose<'a, 's, S, A, B>(lhs: &'s ModLens<'a, S, A>, rhs: &'s ModLens<'a, A, B>) -> ModLensCompoundImpl<'a, 's, S, A, B> {
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, S, 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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/mutable.rs:38:74
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn mod_compose<'a, 's, S, A, B>(lhs: &'s ModLens<'a, S, A>, rhs: &'s ModLens<'a, A, B>) -> ModLensCompoundImpl<'a, 's, S, A, B> {
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, A, 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/mutable.rs:45:43
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn mod_lens<'a, 's, S, A>(getter: &'s Fn(&'a mut S) -> &'a mut A) -> ModLensImpl<'a, 's, S, A> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&'a mut S) -> &'a mut 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: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "a06eabf8dfe5cc3cd4efae61bda7fbc6a9c3921ed07a9c66cde9a565341afaaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a06eabf8dfe5cc3cd4efae61bda7fbc6a9c3921ed07a9c66cde9a565341afaaf", kill_on_drop: false }`
[INFO] [stdout] a06eabf8dfe5cc3cd4efae61bda7fbc6a9c3921ed07a9c66cde9a565341afaaf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8a0fdde7f330aa647b93ab221187af11f4da2604d885cc9e9162695c6c8d7356
[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" "8a0fdde7f330aa647b93ab221187af11f4da2604d885cc9e9162695c6c8d7356", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lens.rs:24:35
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn lens<'a, S, A>(getter: &'a Fn(&S) -> A, setter: &'a Fn(&S, &A) -> S) -> LensImpl<'a, S, A> {
[INFO] [stderr]    |                                   ^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S) -> A`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lens.rs:24:60
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn lens<'a, S, A>(getter: &'a Fn(&S) -> A, setter: &'a Fn(&S, &A) -> S) -> LensImpl<'a, S, A> {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S, &A) -> S`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lens.rs:31:38
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub fn compose<'a, S, A, B>(lhs: &'a Lens<S, A>, rhs: &'a Lens<A, B>) -> CompoundLensImpl<'a, S, A, B> {
[INFO] [stderr]    |                                      ^^^^^^^^^^ help: use `dyn`: `dyn Lens<S, A>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lens.rs:31:59
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub fn compose<'a, S, A, B>(lhs: &'a Lens<S, A>, rhs: &'a Lens<A, B>) -> CompoundLensImpl<'a, S, A, B> {
[INFO] [stderr]    |                                                           ^^^^^^^^^^ help: use `dyn`: `dyn Lens<A, B>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lens.rs:79:15
[INFO] [stderr]    |
[INFO] [stderr] 79 |     view: &'a Fn(&S) -> A,
[INFO] [stderr]    |               ^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&S) -> A`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lens.rs:80:14
[INFO] [stderr]    |
[INFO] [stderr] 80 |     set: &'a Fn (&S, &A) -> S,
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (&S, &A) -> S`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lens.rs:84:14
[INFO] [stderr]    |
[INFO] [stderr] 84 |     lhs: &'a Lens<S, A>,
[INFO] [stderr]    |              ^^^^^^^^^^ help: use `dyn`: `dyn Lens<S, A>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lens.rs:85:14
[INFO] [stderr]    |
[INFO] [stderr] 85 |     rhs: &'a Lens<A, B>,
[INFO] [stderr]    |              ^^^^^^^^^^ help: use `dyn`: `dyn Lens<A, B>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/mutable.rs:20:42
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct ModLensImpl<'a, 's, S, A>(&'s Fn(&'a mut S) -> &'a mut A);
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&'a mut S) -> &'a mut A`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/mutable.rs:22:14
[INFO] [stderr]    |
[INFO] [stderr] 22 |     lhs: &'s ModLens<'a, S, A>,
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, S, A>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/mutable.rs:23:14
[INFO] [stderr]    |
[INFO] [stderr] 23 |     rhs: &'s ModLens<'a, A, B>,
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, A, B>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/mutable.rs:38:46
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn mod_compose<'a, 's, S, A, B>(lhs: &'s ModLens<'a, S, A>, rhs: &'s ModLens<'a, A, B>) -> ModLensCompoundImpl<'a, 's, S, A, B> {
[INFO] [stderr]    |                                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, S, A>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/mutable.rs:38:74
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn mod_compose<'a, 's, S, A, B>(lhs: &'s ModLens<'a, S, A>, rhs: &'s ModLens<'a, A, B>) -> ModLensCompoundImpl<'a, 's, S, A, B> {
[INFO] [stderr]    |                                                                          ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ModLens<'a, A, B>`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/mutable.rs:45:43
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn mod_lens<'a, 's, S, A>(getter: &'s Fn(&'a mut S) -> &'a mut A) -> ModLensImpl<'a, 's, S, A> {
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&'a mut S) -> &'a mut A`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: `lenses` (lib) generated 14 warnings
[INFO] [stderr] warning: `lenses` (lib test) generated 14 warnings (14 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/lenses-3091e2784c8fd9c0)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/lens.rs (/opt/rustwide/target/debug/deps/lens-836b6e4ebcaf8b7f)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test main ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/mutable.rs (/opt/rustwide/target/debug/deps/mutable-7dc73d7546d24a17)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test1 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lenses
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8a0fdde7f330aa647b93ab221187af11f4da2604d885cc9e9162695c6c8d7356", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a0fdde7f330aa647b93ab221187af11f4da2604d885cc9e9162695c6c8d7356", kill_on_drop: false }`
[INFO] [stdout] 8a0fdde7f330aa647b93ab221187af11f4da2604d885cc9e9162695c6c8d7356