[INFO] cloning repository https://github.com/jamii/rust-tagless
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jamii/rust-tagless" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamii%2Frust-tagless"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamii%2Frust-tagless'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f0d27595de7b911fd06e2572f1049225a2ac9193
[INFO] checking jamii/rust-tagless against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjamii%2Frust-tagless" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jamii/rust-tagless on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jamii/rust-tagless
[INFO] finished tweaking git repo https://github.com/jamii/rust-tagless
[INFO] tweaked toml for git repo https://github.com/jamii/rust-tagless written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/jamii/rust-tagless already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d58173f9545dfa67c00980418fef17a0c5da5563bac17a8bbde0a23663a7c424
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "d58173f9545dfa67c00980418fef17a0c5da5563bac17a8bbde0a23663a7c424"`
[INFO] [stderr]     Checking tagless v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: denote infinite loops with `loop { ... }`
[INFO] [stderr]   --> src/main.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |             while true {
[INFO] [stderr]    |             ^^^^^^^^^^ help: use `loop`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(while_true)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:118:16
[INFO] [stderr]     |
[INFO] [stderr] 118 |     Number(Box<Fn() -> i64>),
[INFO] [stderr]     |                ^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> i64`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:119:14
[INFO] [stderr]     |
[INFO] [stderr] 119 |     Bool(Box<Fn() -> bool>),
[INFO] [stderr]     |              ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> bool`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:149:33
[INFO] [stderr]     |
[INFO] [stderr] 149 |             let staged_let: Box<Fn()> = match typ {
[INFO] [stderr]     |                                 ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:254:16
[INFO] [stderr]     |
[INFO] [stderr] 254 |     value: Box<Any>,
[INFO] [stderr]     |                ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:264:23
[INFO] [stderr]     |
[INFO] [stderr] 264 |         let box2: Box<Any> = box box1 as Box<Any>;
[INFO] [stderr]     |                       ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:264:46
[INFO] [stderr]     |
[INFO] [stderr] 264 |         let box2: Box<Any> = box box1 as Box<Any>;
[INFO] [stderr]     |                                              ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:268:31
[INFO] [stderr]     |
[INFO] [stderr] 268 |     fn unwrap<T>(self) -> Box<Fn() -> T + 'static>
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> T + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:298:16
[INFO] [stderr]     |
[INFO] [stderr] 298 |     expr1: Box<Runnable<Output = i64>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = i64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:299:16
[INFO] [stderr]     |
[INFO] [stderr] 299 |     expr2: Box<Runnable<Output = i64>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = i64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:310:16
[INFO] [stderr]     |
[INFO] [stderr] 310 |     expr1: Box<Runnable<Output = i64>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = i64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:311:16
[INFO] [stderr]     |
[INFO] [stderr] 311 |     expr2: Box<Runnable<Output = i64>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = i64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:323:16
[INFO] [stderr]     |
[INFO] [stderr] 323 |     expr1: Box<Runnable<Output = T1>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T1>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:324:16
[INFO] [stderr]     |
[INFO] [stderr] 324 |     expr2: Box<Runnable<Output = T2>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T2>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:354:15
[INFO] [stderr]     |
[INFO] [stderr] 354 |     expr: Box<Runnable<Output = T>>,
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:370:16
[INFO] [stderr]     |
[INFO] [stderr] 370 |     expr1: Box<Runnable<Output = bool>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = bool>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:371:16
[INFO] [stderr]     |
[INFO] [stderr] 371 |     expr2: Box<Runnable<Output = T>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:385:16
[INFO] [stderr]     |
[INFO] [stderr] 385 |     value: Box<Any>,
[INFO] [stderr]     |                ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:394:23
[INFO] [stderr]     |
[INFO] [stderr] 394 |         let box1: Box<Runnable<Output = T>> = box runnable;
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: denote infinite loops with `loop { ... }`
[INFO] [stderr]   --> src/main.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |             while true {
[INFO] [stderr]    |             ^^^^^^^^^^ help: use `loop`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(while_true)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:395:23
[INFO] [stderr]     |
[INFO] [stderr] 395 |         let box2: Box<Any> = box box1 as Box<Any>;
[INFO] [stderr]     |                       ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:395:46
[INFO] [stderr]     |
[INFO] [stderr] 395 |         let box2: Box<Any> = box box1 as Box<Any>;
[INFO] [stderr]     |                                              ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:399:31
[INFO] [stderr]     |
[INFO] [stderr] 399 |     fn unwrap<T>(self) -> Box<Runnable<Output = T>>
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:118:16
[INFO] [stderr]     |
[INFO] [stderr] 118 |     Number(Box<Fn() -> i64>),
[INFO] [stderr]     |                ^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> i64`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:119:14
[INFO] [stderr]     |
[INFO] [stderr] 119 |     Bool(Box<Fn() -> bool>),
[INFO] [stderr]     |              ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> bool`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:149:33
[INFO] [stderr]     |
[INFO] [stderr] 149 |             let staged_let: Box<Fn()> = match typ {
[INFO] [stderr]     |                                 ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:254:16
[INFO] [stderr]     |
[INFO] [stderr] 254 |     value: Box<Any>,
[INFO] [stderr]     |                ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:264:23
[INFO] [stderr]     |
[INFO] [stderr] 264 |         let box2: Box<Any> = box box1 as Box<Any>;
[INFO] [stderr]     |                       ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:264:46
[INFO] [stderr]     |
[INFO] [stderr] 264 |         let box2: Box<Any> = box box1 as Box<Any>;
[INFO] [stderr]     |                                              ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:268:31
[INFO] [stderr]     |
[INFO] [stderr] 268 |     fn unwrap<T>(self) -> Box<Fn() -> T + 'static>
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn() -> T + 'static`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:298:16
[INFO] [stderr]     |
[INFO] [stderr] 298 |     expr1: Box<Runnable<Output = i64>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = i64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:299:16
[INFO] [stderr]     |
[INFO] [stderr] 299 |     expr2: Box<Runnable<Output = i64>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = i64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:310:16
[INFO] [stderr]     |
[INFO] [stderr] 310 |     expr1: Box<Runnable<Output = i64>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = i64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:311:16
[INFO] [stderr]     |
[INFO] [stderr] 311 |     expr2: Box<Runnable<Output = i64>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = i64>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:323:16
[INFO] [stderr]     |
[INFO] [stderr] 323 |     expr1: Box<Runnable<Output = T1>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T1>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:324:16
[INFO] [stderr]     |
[INFO] [stderr] 324 |     expr2: Box<Runnable<Output = T2>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T2>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:354:15
[INFO] [stderr]     |
[INFO] [stderr] 354 |     expr: Box<Runnable<Output = T>>,
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:370:16
[INFO] [stderr]     |
[INFO] [stderr] 370 |     expr1: Box<Runnable<Output = bool>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = bool>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:371:16
[INFO] [stderr]     |
[INFO] [stderr] 371 |     expr2: Box<Runnable<Output = T>>,
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:385:16
[INFO] [stderr]     |
[INFO] [stderr] 385 |     value: Box<Any>,
[INFO] [stderr]     |                ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:394:23
[INFO] [stderr]     |
[INFO] [stderr] 394 |         let box1: Box<Runnable<Output = T>> = box runnable;
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:395:23
[INFO] [stderr]     |
[INFO] [stderr] 395 |         let box2: Box<Any> = box box1 as Box<Any>;
[INFO] [stderr]     |                       ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:395:46
[INFO] [stderr]     |
[INFO] [stderr] 395 |         let box2: Box<Any> = box box1 as Box<Any>;
[INFO] [stderr]     |                                              ^^^ help: use `dyn`: `dyn Any`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:399:31
[INFO] [stderr]     |
[INFO] [stderr] 399 |     fn unwrap<T>(self) -> Box<Runnable<Output = T>>
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Runnable<Output = T>`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Bool`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Bool,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Staged2`
[INFO] [stderr]    --> src/main.rs:253:8
[INFO] [stderr]     |
[INFO] [stderr] 253 | struct Staged2 {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:258:5
[INFO] [stderr]     |
[INFO] [stderr] 258 | /     fn new<T, F>(staged: F) -> Self
[INFO] [stderr] 259 | |     where
[INFO] [stderr] 260 | |         F: Fn() -> T + 'static,
[INFO] [stderr] 261 | |         T: 'static,
[INFO] [stderr] ...   |
[INFO] [stderr] 265 | |         Staged2 { value: box2 }
[INFO] [stderr] 266 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap`
[INFO] [stderr]    --> src/main.rs:268:5
[INFO] [stderr]     |
[INFO] [stderr] 268 | /     fn unwrap<T>(self) -> Box<Fn() -> T + 'static>
[INFO] [stderr] 269 | |     where
[INFO] [stderr] 270 | |         T: 'static,
[INFO] [stderr] 271 | |     {
[INFO] [stderr] ...   |
[INFO] [stderr] 274 | |         }
[INFO] [stderr] 275 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `StagedExpr`
[INFO] [stderr]    --> src/main.rs:384:8
[INFO] [stderr]     |
[INFO] [stderr] 384 | struct StagedExpr {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:389:5
[INFO] [stderr]     |
[INFO] [stderr] 389 | /     fn new<T, R>(runnable: R) -> Self
[INFO] [stderr] 390 | |     where
[INFO] [stderr] 391 | |         R: Runnable<Output = T> + 'static,
[INFO] [stderr] 392 | |         T: 'static,
[INFO] [stderr] ...   |
[INFO] [stderr] 396 | |         StagedExpr { value: box2 }
[INFO] [stderr] 397 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap`
[INFO] [stderr]    --> src/main.rs:399:5
[INFO] [stderr]     |
[INFO] [stderr] 399 | /     fn unwrap<T>(self) -> Box<Runnable<Output = T>>
[INFO] [stderr] 400 | |     where
[INFO] [stderr] 401 | |         T: 'static,
[INFO] [stderr] 402 | |     {
[INFO] [stderr] ...   |
[INFO] [stderr] 405 | |         }
[INFO] [stderr] 406 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Bool`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     Bool,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Staged2`
[INFO] [stderr]    --> src/main.rs:253:8
[INFO] [stderr]     |
[INFO] [stderr] 253 | struct Staged2 {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:258:5
[INFO] [stderr]     |
[INFO] [stderr] 258 | /     fn new<T, F>(staged: F) -> Self
[INFO] [stderr] 259 | |     where
[INFO] [stderr] 260 | |         F: Fn() -> T + 'static,
[INFO] [stderr] 261 | |         T: 'static,
[INFO] [stderr] ...   |
[INFO] [stderr] 265 | |         Staged2 { value: box2 }
[INFO] [stderr] 266 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap`
[INFO] [stderr]    --> src/main.rs:268:5
[INFO] [stderr]     |
[INFO] [stderr] 268 | /     fn unwrap<T>(self) -> Box<Fn() -> T + 'static>
[INFO] [stderr] 269 | |     where
[INFO] [stderr] 270 | |         T: 'static,
[INFO] [stderr] 271 | |     {
[INFO] [stderr] ...   |
[INFO] [stderr] 274 | |         }
[INFO] [stderr] 275 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `StagedExpr`
[INFO] [stderr]    --> src/main.rs:384:8
[INFO] [stderr]     |
[INFO] [stderr] 384 | struct StagedExpr {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:389:5
[INFO] [stderr]     |
[INFO] [stderr] 389 | /     fn new<T, R>(runnable: R) -> Self
[INFO] [stderr] 390 | |     where
[INFO] [stderr] 391 | |         R: Runnable<Output = T> + 'static,
[INFO] [stderr] 392 | |         T: 'static,
[INFO] [stderr] ...   |
[INFO] [stderr] 396 | |         StagedExpr { value: box2 }
[INFO] [stderr] 397 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unwrap`
[INFO] [stderr]    --> src/main.rs:399:5
[INFO] [stderr]     |
[INFO] [stderr] 399 | /     fn unwrap<T>(self) -> Box<Runnable<Output = T>>
[INFO] [stderr] 400 | |     where
[INFO] [stderr] 401 | |         T: 'static,
[INFO] [stderr] 402 | |     {
[INFO] [stderr] ...   |
[INFO] [stderr] 405 | |         }
[INFO] [stderr] 406 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: 29 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 29 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `"docker" "inspect" "d58173f9545dfa67c00980418fef17a0c5da5563bac17a8bbde0a23663a7c424"`
[INFO] running `"docker" "rm" "-f" "d58173f9545dfa67c00980418fef17a0c5da5563bac17a8bbde0a23663a7c424"`
[INFO] [stdout] d58173f9545dfa67c00980418fef17a0c5da5563bac17a8bbde0a23663a7c424