[INFO] fetching crate fp_rust 0.1.39...
[INFO] checking fp_rust-0.1.39 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate fp_rust 0.1.39 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate fp_rust 0.1.39 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fp_rust 0.1.39
[INFO] finished tweaking crates.io crate fp_rust 0.1.39
[INFO] tweaked toml for crates.io crate fp_rust 0.1.39 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cef09f3d4f307e0bf55cf057bd20b101c2f9ae7ca14c1d629def75c724a8d7d4
[INFO] running `Command { std: "docker" "start" "-a" "cef09f3d4f307e0bf55cf057bd20b101c2f9ae7ca14c1d629def75c724a8d7d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cef09f3d4f307e0bf55cf057bd20b101c2f9ae7ca14c1d629def75c724a8d7d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cef09f3d4f307e0bf55cf057bd20b101c2f9ae7ca14c1d629def75c724a8d7d4", kill_on_drop: false }`
[INFO] [stdout] cef09f3d4f307e0bf55cf057bd20b101c2f9ae7ca14c1d629def75c724a8d7d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ceb4574340075eb454f2fae5fd81d5acc2855bbcb0548b04123d9852d973a40
[INFO] running `Command { std: "docker" "start" "-a" "4ceb4574340075eb454f2fae5fd81d5acc2855bbcb0548b04123d9852d973a40", kill_on_drop: false }`
[INFO] [stderr]     Checking fp_rust v0.1.39 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/cor.rs:226:35
[INFO] [stdout]     |
[INFO] [stdout] 226 | type CorEffect<RETURN, RECEIVE> = FnMut(Arc<Mutex<Cor<RETURN, RECEIVE>>>) + Send + Sync + 'static;
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(Arc<Mutex<Cor<RETURN, RECEIVE>>>) + Send + Sync + 'static`
[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/monadio.rs:31:34
[INFO] [stdout]    |
[INFO] [stdout] 31 |     ob_handler: Option<Arc<Mutex<Handler>>>,
[INFO] [stdout]    |                                  ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/monadio.rs:32:35
[INFO] [stdout]    |
[INFO] [stdout] 32 |     sub_handler: Option<Arc<Mutex<Handler>>>,
[INFO] [stdout]    |                                   ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/monadio.rs:60:30
[INFO] [stdout]    |
[INFO] [stdout] 60 |         ob: Option<Arc<Mutex<Handler + 'static>>>,
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/monadio.rs:61:31
[INFO] [stdout]    |
[INFO] [stdout] 61 |         sub: Option<Arc<Mutex<Handler + 'static>>>,
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/monadio.rs:70:54
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub fn observe_on(&mut self, h: Option<Arc<Mutex<Handler + 'static>>>) {
[INFO] [stdout]    |                                                      ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/monadio.rs:74:56
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn subscribe_on(&mut self, h: Option<Arc<Mutex<Handler + 'static>>>) {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/publisher.rs:27:35
[INFO] [stdout]    |
[INFO] [stdout] 27 |     sub_handler: Option<Arc<Mutex<Handler>>>,
[INFO] [stdout]    |                                   ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/publisher.rs:46:50
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn new_with_handlers(h: Option<Arc<Mutex<Handler + 'static>>>) -> Publisher<X> {
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/publisher.rs:84:56
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn subscribe_on(&mut self, h: Option<Arc<Mutex<Handler + 'static>>>) {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/sync.rs:77:24
[INFO] [stdout]    |
[INFO] [stdout] 77 |     handler: Arc<Mutex<Handler>>,
[INFO] [stdout]    |                        ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/sync.rs:89:28
[INFO] [stdout]    |
[INFO] [stdout] 89 |         handler: Arc<Mutex<Handler>>,
[INFO] [stdout]    |                            ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/common.rs:291:21
[INFO] [stdout]     |
[INFO] [stdout] 291 |     func: Arc<Mutex<FnMut() + Send + Sync + 'static>>,
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() + Send + Sync + 'static`
[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/cor.rs:226:35
[INFO] [stdout]     |
[INFO] [stdout] 226 | type CorEffect<RETURN, RECEIVE> = FnMut(Arc<Mutex<Cor<RETURN, RECEIVE>>>) + Send + Sync + 'static;
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(Arc<Mutex<Cor<RETURN, RECEIVE>>>) + Send + Sync + 'static`
[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/monadio.rs:31:34
[INFO] [stdout]    |
[INFO] [stdout] 31 |     ob_handler: Option<Arc<Mutex<Handler>>>,
[INFO] [stdout]    |                                  ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/monadio.rs:32:35
[INFO] [stdout]    |
[INFO] [stdout] 32 |     sub_handler: Option<Arc<Mutex<Handler>>>,
[INFO] [stdout]    |                                   ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/monadio.rs:60:30
[INFO] [stdout]    |
[INFO] [stdout] 60 |         ob: Option<Arc<Mutex<Handler + 'static>>>,
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/monadio.rs:61:31
[INFO] [stdout]    |
[INFO] [stdout] 61 |         sub: Option<Arc<Mutex<Handler + 'static>>>,
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/monadio.rs:70:54
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub fn observe_on(&mut self, h: Option<Arc<Mutex<Handler + 'static>>>) {
[INFO] [stdout]    |                                                      ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/monadio.rs:74:56
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn subscribe_on(&mut self, h: Option<Arc<Mutex<Handler + 'static>>>) {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/publisher.rs:27:35
[INFO] [stdout]    |
[INFO] [stdout] 27 |     sub_handler: Option<Arc<Mutex<Handler>>>,
[INFO] [stdout]    |                                   ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/publisher.rs:46:50
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn new_with_handlers(h: Option<Arc<Mutex<Handler + 'static>>>) -> Publisher<X> {
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/publisher.rs:84:56
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn subscribe_on(&mut self, h: Option<Arc<Mutex<Handler + 'static>>>) {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Handler + 'static`
[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/sync.rs:77:24
[INFO] [stdout]    |
[INFO] [stdout] 77 |     handler: Arc<Mutex<Handler>>,
[INFO] [stdout]    |                        ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/sync.rs:89:28
[INFO] [stdout]    |
[INFO] [stdout] 89 |         handler: Arc<Mutex<Handler>>,
[INFO] [stdout]    |                            ^^^^^^^ help: use `dyn`: `dyn Handler`
[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/common.rs:291:21
[INFO] [stdout]     |
[INFO] [stdout] 291 |     func: Arc<Mutex<FnMut() + Send + Sync + 'static>>,
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() + Send + Sync + 'static`
[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: unnecessary trailing semicolon
[INFO] [stdout]    --> src/common.rs:41:11
[INFO] [stdout]     |
[INFO] [stdout] 41  |           )*;
[INFO] [stdout]     |             ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 330 | /     map_insert!(actual, [
[INFO] [stdout] 331 | |         a : "2",
[INFO] [stdout] 332 | |         b : "4",
[INFO] [stdout] 333 | |         c : "6",
[INFO] [stdout] 334 | |     ]);
[INFO] [stdout]     | |_______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `map_insert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/common.rs:34:11
[INFO] [stdout]     |
[INFO] [stdout] 34  |           )*;
[INFO] [stdout]     |             ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 337 | /     map_insert!(actual, {
[INFO] [stdout] 338 | |         a : "2",
[INFO] [stdout] 339 | |         b : "4",
[INFO] [stdout] 340 | |         c : "6",
[INFO] [stdout] 341 | |     });
[INFO] [stdout]     | |_______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `map_insert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/common.rs:55:11
[INFO] [stdout]     |
[INFO] [stdout] 55  |           )*;
[INFO] [stdout]     |             ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 350 | /     map_insert!(actual, [
[INFO] [stdout] 351 | |         "1" => "2",
[INFO] [stdout] 352 | |         "3" => "4",
[INFO] [stdout] 353 | |         "5" => "6",
[INFO] [stdout] 354 | |     ]);
[INFO] [stdout]     | |_______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `map_insert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/common.rs:48:11
[INFO] [stdout]     |
[INFO] [stdout] 48  |           )*;
[INFO] [stdout]     |             ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 357 | /     map_insert!(actual, {
[INFO] [stdout] 358 | |         "1" => "2",
[INFO] [stdout] 359 | |         "3" => "4",
[INFO] [stdout] 360 | |         "5" => "6",
[INFO] [stdout] 361 | |     });
[INFO] [stdout]     | |_______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `map_insert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/common.rs:62:11
[INFO] [stdout]     |
[INFO] [stdout] 62  |         )*;
[INFO] [stdout]     |           ^ help: remove this semicolon
[INFO] [stdout] ...
[INFO] [stdout] 365 |     map_insert!(actual, ["1", "2", "3", "4", "5", "6",]);
[INFO] [stdout]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `map_insert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> src/fp.rs:205:19
[INFO] [stdout]     |
[INFO] [stdout] 205 |     v.into_iter().reduce(f)
[INFO] [stdout]     |                   ^^^^^^ multiple `reduce` found
[INFO] [stdout]     |
[INFO] [stdout] note: candidate #1 is defined in an impl of the trait `Reduce` for the type `I`
[INFO] [stdout]    --> src/fp.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 | /     fn reduce<F>(mut self, f: F) -> Option<T>
[INFO] [stdout] 195 | |     where
[INFO] [stdout] 196 | |         Self: Sized,
[INFO] [stdout] 197 | |         F: FnMut(T, T) -> T,
[INFO] [stdout]     | |____________________________^
[INFO] [stdout]     = note: candidate #2 is defined in an impl of the trait `Iterator` for the type `std::vec::IntoIter<T, A>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 205 |     Reduce::reduce(v.into_iter(), f)
[INFO] [stdout]     |
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 205 |     Iterator::reduce(v.into_iter(), f)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fp_rust` due to 2 previous errors; 13 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> src/fp.rs:205:19
[INFO] [stdout]     |
[INFO] [stdout] 205 |     v.into_iter().reduce(f)
[INFO] [stdout]     |                   ^^^^^^ multiple `reduce` found
[INFO] [stdout]     |
[INFO] [stdout] note: candidate #1 is defined in an impl of the trait `Reduce` for the type `I`
[INFO] [stdout]    --> src/fp.rs:194:5
[INFO] [stdout]     |
[INFO] [stdout] 194 | /     fn reduce<F>(mut self, f: F) -> Option<T>
[INFO] [stdout] 195 | |     where
[INFO] [stdout] 196 | |         Self: Sized,
[INFO] [stdout] 197 | |         F: FnMut(T, T) -> T,
[INFO] [stdout]     | |____________________________^
[INFO] [stdout]     = note: candidate #2 is defined in an impl of the trait `Iterator` for the type `std::vec::IntoIter<T, A>`
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 205 |     Reduce::reduce(v.into_iter(), f)
[INFO] [stdout]     |
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 205 |     Iterator::reduce(v.into_iter(), f)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4ceb4574340075eb454f2fae5fd81d5acc2855bbcb0548b04123d9852d973a40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ceb4574340075eb454f2fae5fd81d5acc2855bbcb0548b04123d9852d973a40", kill_on_drop: false }`
[INFO] [stdout] 4ceb4574340075eb454f2fae5fd81d5acc2855bbcb0548b04123d9852d973a40