[INFO] fetching crate data_tracker 0.1.0...
[INFO] testing data_tracker-0.1.0 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate data_tracker 0.1.0 into /workspace/builds/worker-75/source
[INFO] validating manifest of crates.io crate data_tracker 0.1.0 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate data_tracker 0.1.0
[INFO] finished tweaking crates.io crate data_tracker 0.1.0
[INFO] tweaked toml for crates.io crate data_tracker 0.1.0 written to /workspace/builds/worker-75/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 480b012731c7229cc25b3dcc729c4e2fa22cb563dfbe78d2e855a1e0dcf82978
[INFO] running `Command { std: "docker" "start" "-a" "480b012731c7229cc25b3dcc729c4e2fa22cb563dfbe78d2e855a1e0dcf82978", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "480b012731c7229cc25b3dcc729c4e2fa22cb563dfbe78d2e855a1e0dcf82978", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "480b012731c7229cc25b3dcc729c4e2fa22cb563dfbe78d2e855a1e0dcf82978", kill_on_drop: false }`
[INFO] [stdout] 480b012731c7229cc25b3dcc729c4e2fa22cb563dfbe78d2e855a1e0dcf82978
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 441b3748b572b223bc652cdab0f27f8d56fa18de50d0f608a96b16bac99f8eda
[INFO] running `Command { std: "docker" "start" "-a" "441b3748b572b223bc652cdab0f27f8d56fa18de50d0f608a96b16bac99f8eda", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling data_tracker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:28
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn_map: HashMap<K, Box<OnChanged<T>>>,
[INFO] [stdout]     |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:47
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn add_listener(&mut self, key: K, f: Box<OnChanged<T>>) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:76
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn add_listener(&mut self, key: K, f: Box<OnChanged<T>>) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:124:58
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn remove_listener(&mut self, key: &K) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:229:39
[INFO] [stdout]     |
[INFO] [stdout] 229 |                         callback: Box<OnChanged<T>>)
[INFO] [stdout]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:230:39
[INFO] [stdout]     |
[INFO] [stdout] 230 |                         -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:238:62
[INFO] [stdout]     |
[INFO] [stdout] 238 |     pub fn remove_listener(&mut self, key: &K) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "441b3748b572b223bc652cdab0f27f8d56fa18de50d0f608a96b16bac99f8eda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "441b3748b572b223bc652cdab0f27f8d56fa18de50d0f608a96b16bac99f8eda", kill_on_drop: false }`
[INFO] [stdout] 441b3748b572b223bc652cdab0f27f8d56fa18de50d0f608a96b16bac99f8eda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee9f3e5912b48a7c63f8f8a67e17a6c6eb8734a175b9d5cd75102e35d3388f34
[INFO] running `Command { std: "docker" "start" "-a" "ee9f3e5912b48a7c63f8f8a67e17a6c6eb8734a175b9d5cd75102e35d3388f34", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:28
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn_map: HashMap<K, Box<OnChanged<T>>>,
[INFO] [stdout]     |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling data_tracker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:47
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn add_listener(&mut self, key: K, f: Box<OnChanged<T>>) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:76
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn add_listener(&mut self, key: K, f: Box<OnChanged<T>>) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:124:58
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn remove_listener(&mut self, key: &K) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:229:39
[INFO] [stdout]     |
[INFO] [stdout] 229 |                         callback: Box<OnChanged<T>>)
[INFO] [stdout]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:230:39
[INFO] [stdout]     |
[INFO] [stdout] 230 |                         -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:238:62
[INFO] [stdout]     |
[INFO] [stdout] 238 |     pub fn remove_listener(&mut self, key: &K) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:114:28
[INFO] [stdout]     |
[INFO] [stdout] 114 |     fn_map: HashMap<K, Box<OnChanged<T>>>,
[INFO] [stdout]     |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:47
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn add_listener(&mut self, key: K, f: Box<OnChanged<T>>) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:76
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn add_listener(&mut self, key: K, f: Box<OnChanged<T>>) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                                            ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:124:58
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn remove_listener(&mut self, key: &K) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:229:39
[INFO] [stdout]     |
[INFO] [stdout] 229 |                         callback: Box<OnChanged<T>>)
[INFO] [stdout]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:230:39
[INFO] [stdout]     |
[INFO] [stdout] 230 |                         -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:238:62
[INFO] [stdout]     |
[INFO] [stdout] 238 |     pub fn remove_listener(&mut self, key: &K) -> Option<Box<OnChanged<T>>> {
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "ee9f3e5912b48a7c63f8f8a67e17a6c6eb8734a175b9d5cd75102e35d3388f34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee9f3e5912b48a7c63f8f8a67e17a6c6eb8734a175b9d5cd75102e35d3388f34", kill_on_drop: false }`
[INFO] [stdout] ee9f3e5912b48a7c63f8f8a67e17a6c6eb8734a175b9d5cd75102e35d3388f34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bb526c19bcb1f0534678d4f425d8fe900513dc13c0811149d68ac1d5567fecdf
[INFO] running `Command { std: "docker" "start" "-a" "bb526c19bcb1f0534678d4f425d8fe900513dc13c0811149d68ac1d5567fecdf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:114:28
[INFO] [stderr]     |
[INFO] [stderr] 114 |     fn_map: HashMap<K, Box<OnChanged<T>>>,
[INFO] [stderr]     |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:121:47
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn add_listener(&mut self, key: K, f: Box<OnChanged<T>>) -> Option<Box<OnChanged<T>>> {
[INFO] [stderr]     |                                               ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:121:76
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn add_listener(&mut self, key: K, f: Box<OnChanged<T>>) -> Option<Box<OnChanged<T>>> {
[INFO] [stderr]     |                                                                            ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:124:58
[INFO] [stderr]     |
[INFO] [stderr] 124 |     fn remove_listener(&mut self, key: &K) -> Option<Box<OnChanged<T>>> {
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:229:39
[INFO] [stderr]     |
[INFO] [stderr] 229 |                         callback: Box<OnChanged<T>>)
[INFO] [stderr]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:230:39
[INFO] [stderr]     |
[INFO] [stderr] 230 |                         -> Option<Box<OnChanged<T>>> {
[INFO] [stderr]     |                                       ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:238:62
[INFO] [stderr]     |
[INFO] [stderr] 238 |     pub fn remove_listener(&mut self, key: &K) -> Option<Box<OnChanged<T>>> {
[INFO] [stderr]     |                                                              ^^^^^^^^^^^^ help: use `dyn`: `dyn OnChanged<T>`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: `data_tracker` (lib) generated 7 warnings
[INFO] [stderr] warning: `data_tracker` (lib test) generated 7 warnings (7 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.75s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/data_tracker-f588690b0b2fd2be)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::track_enum ... ok
[INFO] [stdout] test tests::callback_arg_order ... ok
[INFO] [stdout] test tests::track_send_impl ... ok
[INFO] [stdout] test tests::track_struct ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests data_tracker
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 33) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.47s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bb526c19bcb1f0534678d4f425d8fe900513dc13c0811149d68ac1d5567fecdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb526c19bcb1f0534678d4f425d8fe900513dc13c0811149d68ac1d5567fecdf", kill_on_drop: false }`
[INFO] [stdout] bb526c19bcb1f0534678d4f425d8fe900513dc13c0811149d68ac1d5567fecdf