[INFO] fetching crate fp_rust 0.1.39...
[INFO] building fp_rust-0.1.39 against master#ff34b919075f35a1787659e9c448a34b06bab8de for issue-85264
[INFO] extracting crate fp_rust 0.1.39 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate fp_rust 0.1.39 on toolchain ff34b919075f35a1787659e9c448a34b06bab8de
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "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-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ab4df1aa81306aa33c797d763b6bae8abde6536601c3366984ddc36b0b1d801
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0ab4df1aa81306aa33c797d763b6bae8abde6536601c3366984ddc36b0b1d801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ab4df1aa81306aa33c797d763b6bae8abde6536601c3366984ddc36b0b1d801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ab4df1aa81306aa33c797d763b6bae8abde6536601c3366984ddc36b0b1d801", kill_on_drop: false }`
[INFO] [stdout] 0ab4df1aa81306aa33c797d763b6bae8abde6536601c3366984ddc36b0b1d801
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6689c9c0081966efcc9f5024dc1181edd80f4994d851fd66a16c50b2c4a79cf6
[INFO] running `Command { std: "docker" "start" "-a" "6689c9c0081966efcc9f5024dc1181edd80f4994d851fd66a16c50b2c4a79cf6", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6689c9c0081966efcc9f5024dc1181edd80f4994d851fd66a16c50b2c4a79cf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6689c9c0081966efcc9f5024dc1181edd80f4994d851fd66a16c50b2c4a79cf6", kill_on_drop: false }`
[INFO] [stdout] 6689c9c0081966efcc9f5024dc1181edd80f4994d851fd66a16c50b2c4a79cf6
