[INFO] fetching crate data_tracker 0.1.0...
[INFO] checking data_tracker-0.1.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate data_tracker 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate data_tracker 0.1.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fbe7666727b43ecea6764959d9b265be0feecf3f0ac4d1883a7636a39e8bc9f1
[INFO] running `Command { std: "docker" "start" "-a" "fbe7666727b43ecea6764959d9b265be0feecf3f0ac4d1883a7636a39e8bc9f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fbe7666727b43ecea6764959d9b265be0feecf3f0ac4d1883a7636a39e8bc9f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbe7666727b43ecea6764959d9b265be0feecf3f0ac4d1883a7636a39e8bc9f1", kill_on_drop: false }`
[INFO] [stdout] fbe7666727b43ecea6764959d9b265be0feecf3f0ac4d1883a7636a39e8bc9f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ff1c7e1c0a5252556088f2ec5c46cc1ea6794245f7838f614f84f1ad87e3137
[INFO] running `Command { std: "docker" "start" "-a" "7ff1c7e1c0a5252556088f2ec5c46cc1ea6794245f7838f614f84f1ad87e3137", kill_on_drop: false }`
[INFO] [stderr]     Checking 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 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/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 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/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 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/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 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/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 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/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 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/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 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/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 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/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 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/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 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/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 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/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 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/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 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/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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "7ff1c7e1c0a5252556088f2ec5c46cc1ea6794245f7838f614f84f1ad87e3137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ff1c7e1c0a5252556088f2ec5c46cc1ea6794245f7838f614f84f1ad87e3137", kill_on_drop: false }`
[INFO] [stdout] 7ff1c7e1c0a5252556088f2ec5c46cc1ea6794245f7838f614f84f1ad87e3137