[INFO] fetching crate attr 0.1.0...
[INFO] checking attr-0.1.0 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate attr 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate attr 0.1.0 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate attr 0.1.0
[INFO] finished tweaking crates.io crate attr 0.1.0
[INFO] tweaked toml for crates.io crate attr 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-traits v0.1.43
[INFO] [stderr]   Downloaded serde_json v0.8.6
[INFO] [stderr]   Downloaded dtoa v0.2.2
[INFO] [stderr]   Downloaded itoa v0.1.1
[INFO] [stderr]   Downloaded serde v0.8.23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5be7590f94080cd6a95692dc53c31f221af26cd523679840127a5adeff99d469
[INFO] running `Command { std: "docker" "start" "-a" "5be7590f94080cd6a95692dc53c31f221af26cd523679840127a5adeff99d469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5be7590f94080cd6a95692dc53c31f221af26cd523679840127a5adeff99d469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5be7590f94080cd6a95692dc53c31f221af26cd523679840127a5adeff99d469", kill_on_drop: false }`
[INFO] [stdout] 5be7590f94080cd6a95692dc53c31f221af26cd523679840127a5adeff99d469
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] da82eefc1f76078088b364cf221116d4457d63ade65f6aec0640cdf58e483f43
[INFO] running `Command { std: "docker" "start" "-a" "da82eefc1f76078088b364cf221116d4457d63ade65f6aec0640cdf58e483f43", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking attr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> src/lib.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:66:36
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn iter(&self, i: Type) -> Box<Iterator<Item=Self::Item> + 'a>;
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn iter(&self, i: Type) -> Box<dyn Iterator<Item=Self::Item> + 'a>;
[INFO] [stdout]    |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:78:43
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn iter(&self, i: Type) -> Result<Box<Iterator<Item=Self::Item> + 'a>>;
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn iter(&self, i: Type) -> Result<Box<dyn Iterator<Item=Self::Item> + 'a>>;
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:189:49
[INFO] [stdout]     |
[INFO] [stdout] 189 |     fn traverse(&'a self, obj: X) -> Result<Box<Iterator<Item=Result<Z>> + 'a>> {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 189 |     fn traverse(&'a self, obj: X) -> Result<Box<dyn Iterator<Item=Result<Z>> + 'a>> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:281:102
[INFO] [stdout]     |
[INFO] [stdout] 281 | ...b, NY: 'b, NA>(self, attr: NA) -> Path<NX, Box<std::iter::Iterator<Item=Result<Z>> + 'a>, NA, Self>
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 281 |     pub fn from<'a, 'b: 'a, X: 'b, Y: 'b, Z: 'b, NX: 'b, NY: 'b, NA>(self, attr: NA) -> Path<NX, Box<dyn std::iter::Iterator<Item=Result<Z>> + 'a>, NA, Self>
[INFO] [stdout]     |                                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:187:105
[INFO] [stdout]     |
[INFO] [stdout] 187 | impl<'a, X: 'a, Z: 'a, A: IterableAttr<'a, X>, R: Traverse<'a, 'a, A::Item, Z>> Traverse<'a, 'a, X, Box<Iterator<Item=Result<Z>> + 'a>> f...
[INFO] [stdout]     |                                                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 187 | impl<'a, X: 'a, Z: 'a, A: IterableAttr<'a, X>, R: Traverse<'a, 'a, A::Item, Z>> Traverse<'a, 'a, X, Box<dyn Iterator<Item=Result<Z>> + 'a>> for MapPath<A, R> {
[INFO] [stdout]     |                                                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:285:46
[INFO] [stdout]     |
[INFO] [stdout] 285 |               Self: Traverse<'a, 'b, NY, Box<std::iter::Iterator<Item=Result<Z>>>>
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 285 |               Self: Traverse<'a, 'b, NY, Box<dyn std::iter::Iterator<Item=Result<Z>>>>
[INFO] [stdout]     |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> src/lib.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:66:36
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn iter(&self, i: Type) -> Box<Iterator<Item=Self::Item> + 'a>;
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn iter(&self, i: Type) -> Box<dyn Iterator<Item=Self::Item> + 'a>;
[INFO] [stdout]    |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:78:43
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn iter(&self, i: Type) -> Result<Box<Iterator<Item=Self::Item> + 'a>>;
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn iter(&self, i: Type) -> Result<Box<dyn Iterator<Item=Self::Item> + 'a>>;
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> benches/access_bench.rs:147:43
[INFO] [stdout]     |
[INFO] [stdout] 147 |         fn iter(&self, i: &'a Foo) -> Box<Iterator<Item=&'a i32> + 'a> {
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 147 |         fn iter(&self, i: &'a Foo) -> Box<dyn Iterator<Item=&'a i32> + 'a> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:189:49
[INFO] [stdout]     |
[INFO] [stdout] 189 |     fn traverse(&'a self, obj: X) -> Result<Box<Iterator<Item=Result<Z>> + 'a>> {
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 189 |     fn traverse(&'a self, obj: X) -> Result<Box<dyn Iterator<Item=Result<Z>> + 'a>> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> benches/access_bench.rs:155:47
[INFO] [stdout]     |
[INFO] [stdout] 155 |         fn iter(&self, i: &'a mut Foo) -> Box<Iterator<Item=&'a mut i32> +'a> {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 155 |         fn iter(&self, i: &'a mut Foo) -> Box<dyn Iterator<Item=&'a mut i32> +'a> {
[INFO] [stdout]     |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:281:102
[INFO] [stdout]     |
[INFO] [stdout] 281 | ...b, NY: 'b, NA>(self, attr: NA) -> Path<NX, Box<std::iter::Iterator<Item=Result<Z>> + 'a>, NA, Self>
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 281 |     pub fn from<'a, 'b: 'a, X: 'b, Y: 'b, Z: 'b, NX: 'b, NY: 'b, NA>(self, attr: NA) -> Path<NX, Box<dyn std::iter::Iterator<Item=Result<Z>> + 'a>, NA, Self>
[INFO] [stdout]     |                                                                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:187:105
[INFO] [stdout]     |
[INFO] [stdout] 187 | impl<'a, X: 'a, Z: 'a, A: IterableAttr<'a, X>, R: Traverse<'a, 'a, A::Item, Z>> Traverse<'a, 'a, X, Box<Iterator<Item=Result<Z>> + 'a>> f...
[INFO] [stdout]     |                                                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 187 | impl<'a, X: 'a, Z: 'a, A: IterableAttr<'a, X>, R: Traverse<'a, 'a, A::Item, Z>> Traverse<'a, 'a, X, Box<dyn Iterator<Item=Result<Z>> + 'a>> for MapPath<A, R> {
[INFO] [stdout]     |                                                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> tests/nested.rs:143:43
[INFO] [stdout]     |
[INFO] [stdout] 143 |         fn iter(&self, i: &'a Foo) -> Box<Iterator<Item=&'a i32> + 'a> {
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 143 |         fn iter(&self, i: &'a Foo) -> Box<dyn Iterator<Item=&'a i32> + 'a> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> tests/nested.rs:151:47
[INFO] [stdout]     |
[INFO] [stdout] 151 |         fn iter(&self, i: &'a mut Foo) -> Box<Iterator<Item=&'a mut i32> +'a> {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 151 |         fn iter(&self, i: &'a mut Foo) -> Box<dyn Iterator<Item=&'a mut i32> +'a> {
[INFO] [stdout]     |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:285:46
[INFO] [stdout]     |
[INFO] [stdout] 285 |               Self: Traverse<'a, 'b, NY, Box<std::iter::Iterator<Item=Result<Z>>>>
[INFO] [stdout]     |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 285 |               Self: Traverse<'a, 'b, NY, Box<dyn std::iter::Iterator<Item=Result<Z>>>>
[INFO] [stdout]     |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/mapping.rs:88:43
[INFO] [stdout]    |
[INFO] [stdout] 88 |         fn iter(&self, i: &'a Foo) -> Box<Iterator<Item=&'a Bla> + 'a> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 88 |         fn iter(&self, i: &'a Foo) -> Box<dyn Iterator<Item=&'a Bla> + 'a> {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> tests/simple.rs:108:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let mut batz = Bar::attrs().batz.get(&mut f);
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Attributes` is never used
[INFO] [stdout]   --> benches/access_bench.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | trait Attributes<AttributeType> {
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0597]: `path` does not live long enough
[INFO] [stdout]    --> tests/mapping.rs:197:18
[INFO] [stdout]     |
[INFO] [stdout] 195 |     let path = retrieve(bla::Name).mapped(foo::Vector).from(top::FooField);
[INFO] [stdout]     |         ---- binding `path` declared here
[INFO] [stdout] 196 |
[INFO] [stdout] 197 |     let result = path.traverse(&top).unwrap().map(std::result::Result::unwrap).collect::<Vec<_>>();
[INFO] [stdout]     |                  ^^^^---------------
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  borrowed value does not live long enough
[INFO] [stdout]     |                  argument requires that `path` is borrowed for `'static`
[INFO] [stdout] 198 |     assert_eq!(result, vec!["foo", "bla"]);
[INFO] [stdout] 199 | }
[INFO] [stdout]     | - `path` dropped here while still borrowed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0597]: `top` does not live long enough
[INFO] [stdout]    --> tests/mapping.rs:197:32
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let top = Top { foo: f };
[INFO] [stdout]     |         --- binding `top` declared here
[INFO] [stdout] ...
[INFO] [stdout] 197 |     let result = path.traverse(&top).unwrap().map(std::result::Result::unwrap).collect::<Vec<_>>();
[INFO] [stdout]     |                  --------------^^^^-
[INFO] [stdout]     |                  |             |
[INFO] [stdout]     |                  |             borrowed value does not live long enough
[INFO] [stdout]     |                  argument requires that `top` is borrowed for `'static`
[INFO] [stdout] 198 |     assert_eq!(result, vec!["foo", "bla"]);
[INFO] [stdout] 199 | }
[INFO] [stdout]     | - `top` dropped here while still borrowed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> tests/nested.rs:252:13
[INFO] [stdout]     |
[INFO] [stdout] 252 |         let mut x: &mut i32 = foo::Numbers.at(&mut f, 1);
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[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 E0597`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `attr` (test "mapping") due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "da82eefc1f76078088b364cf221116d4457d63ade65f6aec0640cdf58e483f43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da82eefc1f76078088b364cf221116d4457d63ade65f6aec0640cdf58e483f43", kill_on_drop: false }`
[INFO] [stdout] da82eefc1f76078088b364cf221116d4457d63ade65f6aec0640cdf58e483f43
