[INFO] fetching crate functor 0.1.2...
[INFO] testing functor-0.1.2 against 1.59.0 for beta-1.60-1
[INFO] extracting crate functor 0.1.2 into /workspace/builds/worker-85/source
[INFO] validating manifest of crates.io crate functor 0.1.2 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate functor 0.1.2
[INFO] finished tweaking crates.io crate functor 0.1.2
[INFO] tweaked toml for crates.io crate functor 0.1.2 written to /workspace/builds/worker-85/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d03648186247b4d4bea4ca0142ab9f4cbe08bb5184e1120e795cfb6ccc6f4d3
[INFO] running `Command { std: "docker" "start" "-a" "7d03648186247b4d4bea4ca0142ab9f4cbe08bb5184e1120e795cfb6ccc6f4d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d03648186247b4d4bea4ca0142ab9f4cbe08bb5184e1120e795cfb6ccc6f4d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d03648186247b4d4bea4ca0142ab9f4cbe08bb5184e1120e795cfb6ccc6f4d3", kill_on_drop: false }`
[INFO] [stdout] 7d03648186247b4d4bea4ca0142ab9f4cbe08bb5184e1120e795cfb6ccc6f4d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f34ff0d11e5b679ae0613b39a6203709db533e1b3049c63260dbb2b1ebe89e0b
[INFO] running `Command { std: "docker" "start" "-a" "f34ff0d11e5b679ae0613b39a6203709db533e1b3049c63260dbb2b1ebe89e0b", kill_on_drop: false }`
[INFO] [stderr]    Compiling morphism v0.4.1
[INFO] [stderr]    Compiling functor v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn to(&self, A) -> B;
[INFO] [stdout]   |                  ^ help: try naming the parameter or explicitly ignoring it: `_: A`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn from(&self, B) -> A;
[INFO] [stdout]   |                    ^ help: try naming the parameter or explicitly ignoring it: `_: B`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn to_once(self, A) -> B;
[INFO] [stdout]   |                      ^ help: try naming the parameter or explicitly ignoring it: `_: A`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn from_once(self, B) -> A;
[INFO] [stdout]   |                        ^ help: try naming the parameter or explicitly ignoring it: `_: B`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/lib.rs:8:49
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn fmap<F: 'a + Fn(Self::Param) -> B>(self, F) -> Self::Output;
[INFO] [stdout]   |                                                 ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:12:58
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn fmap_once<F: 'a + FnOnce(Self::Param) -> B>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                          ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:16:54
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn contramap<F: 'a + Fn(B) -> Self::Param>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                      ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:20:63
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn contramap_once<F: 'a + FnOnce(B) -> Self::Param>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                               ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:24:50
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn invmap<F: 'a + Iso<Self::Param, B>>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                  ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:28:59
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn invmap_once<F: 'a + IsoOnce<Self::Param, B>>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                           ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "f34ff0d11e5b679ae0613b39a6203709db533e1b3049c63260dbb2b1ebe89e0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f34ff0d11e5b679ae0613b39a6203709db533e1b3049c63260dbb2b1ebe89e0b", kill_on_drop: false }`
[INFO] [stdout] f34ff0d11e5b679ae0613b39a6203709db533e1b3049c63260dbb2b1ebe89e0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc6552b6038942c1a476e0d69e2fa89cf4cad3bd802a17110d2a37733f884be3
[INFO] running `Command { std: "docker" "start" "-a" "bc6552b6038942c1a476e0d69e2fa89cf4cad3bd802a17110d2a37733f884be3", kill_on_drop: false }`
[INFO] [stderr]    Compiling functor v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn to(&self, A) -> B;
[INFO] [stdout]   |                  ^ help: try naming the parameter or explicitly ignoring it: `_: A`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn from(&self, B) -> A;
[INFO] [stdout]   |                    ^ help: try naming the parameter or explicitly ignoring it: `_: B`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn to_once(self, A) -> B;
[INFO] [stdout]   |                      ^ help: try naming the parameter or explicitly ignoring it: `_: A`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn from_once(self, B) -> A;
[INFO] [stdout]   |                        ^ help: try naming the parameter or explicitly ignoring it: `_: B`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/lib.rs:8:49
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn fmap<F: 'a + Fn(Self::Param) -> B>(self, F) -> Self::Output;
[INFO] [stdout]   |                                                 ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:12:58
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn fmap_once<F: 'a + FnOnce(Self::Param) -> B>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                          ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:16:54
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn contramap<F: 'a + Fn(B) -> Self::Param>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                      ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:20:63
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn contramap_once<F: 'a + FnOnce(B) -> Self::Param>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                               ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:24:50
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn invmap<F: 'a + Iso<Self::Param, B>>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                  ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:28:59
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn invmap_once<F: 'a + IsoOnce<Self::Param, B>>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                           ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn to(&self, A) -> B;
[INFO] [stdout]   |                  ^ help: try naming the parameter or explicitly ignoring it: `_: A`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn from(&self, B) -> A;
[INFO] [stdout]   |                    ^ help: try naming the parameter or explicitly ignoring it: `_: B`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn to_once(self, A) -> B;
[INFO] [stdout]   |                      ^ help: try naming the parameter or explicitly ignoring it: `_: A`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/isomorphism.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn from_once(self, B) -> A;
[INFO] [stdout]   |                        ^ help: try naming the parameter or explicitly ignoring it: `_: B`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/lib.rs:8:49
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn fmap<F: 'a + Fn(Self::Param) -> B>(self, F) -> Self::Output;
[INFO] [stdout]   |                                                 ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:12:58
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn fmap_once<F: 'a + FnOnce(Self::Param) -> B>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                          ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:16:54
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn contramap<F: 'a + Fn(B) -> Self::Param>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                      ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:20:63
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn contramap_once<F: 'a + FnOnce(B) -> Self::Param>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                               ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:24:50
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn invmap<F: 'a + Iso<Self::Param, B>>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                  ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:28:59
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn invmap_once<F: 'a + IsoOnce<Self::Param, B>>(self, F) -> Self::Output;
[INFO] [stdout]    |                                                           ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "bc6552b6038942c1a476e0d69e2fa89cf4cad3bd802a17110d2a37733f884be3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc6552b6038942c1a476e0d69e2fa89cf4cad3bd802a17110d2a37733f884be3", kill_on_drop: false }`
[INFO] [stdout] bc6552b6038942c1a476e0d69e2fa89cf4cad3bd802a17110d2a37733f884be3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-85/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 61248daef10150df9c1c3e533d8095f1df99ff6ad9cc21b290853d08dfbbfe7a
[INFO] running `Command { std: "docker" "start" "-a" "61248daef10150df9c1c3e533d8095f1df99ff6ad9cc21b290853d08dfbbfe7a", kill_on_drop: false }`
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]  --> src/isomorphism.rs:2:18
[INFO] [stderr]   |
[INFO] [stderr] 2 |     fn to(&self, A) -> B;
[INFO] [stderr]   |                  ^ help: try naming the parameter or explicitly ignoring it: `_: A`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]  --> src/isomorphism.rs:3:20
[INFO] [stderr]   |
[INFO] [stderr] 3 |     fn from(&self, B) -> A;
[INFO] [stderr]   |                    ^ help: try naming the parameter or explicitly ignoring it: `_: B`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]  --> src/isomorphism.rs:7:22
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn to_once(self, A) -> B;
[INFO] [stderr]   |                      ^ help: try naming the parameter or explicitly ignoring it: `_: A`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]  --> src/isomorphism.rs:8:24
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn from_once(self, B) -> A;
[INFO] [stderr]   |                        ^ help: try naming the parameter or explicitly ignoring it: `_: B`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]  --> src/lib.rs:8:49
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn fmap<F: 'a + Fn(Self::Param) -> B>(self, F) -> Self::Output;
[INFO] [stderr]   |                                                 ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]   --> src/lib.rs:12:58
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn fmap_once<F: 'a + FnOnce(Self::Param) -> B>(self, F) -> Self::Output;
[INFO] [stderr]    |                                                          ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]   --> src/lib.rs:16:54
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn contramap<F: 'a + Fn(B) -> Self::Param>(self, F) -> Self::Output;
[INFO] [stderr]    |                                                      ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]   --> src/lib.rs:20:63
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn contramap_once<F: 'a + FnOnce(B) -> Self::Param>(self, F) -> Self::Output;
[INFO] [stderr]    |                                                               ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]   --> src/lib.rs:24:50
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn invmap<F: 'a + Iso<Self::Param, B>>(self, F) -> Self::Output;
[INFO] [stderr]    |                                                  ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stderr]   --> src/lib.rs:28:59
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn invmap_once<F: 'a + IsoOnce<Self::Param, B>>(self, F) -> Self::Output;
[INFO] [stderr]    |                                                           ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stderr]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stderr] 
[INFO] [stderr] warning: `functor` (lib) generated 10 warnings
[INFO] [stderr] warning: `functor` (lib test) generated 10 warnings (10 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/functor-ceffec1960894190)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests functor
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "61248daef10150df9c1c3e533d8095f1df99ff6ad9cc21b290853d08dfbbfe7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61248daef10150df9c1c3e533d8095f1df99ff6ad9cc21b290853d08dfbbfe7a", kill_on_drop: false }`
[INFO] [stdout] 61248daef10150df9c1c3e533d8095f1df99ff6ad9cc21b290853d08dfbbfe7a