[INFO] cloning repository https://github.com/yuk1ty/rusty-monad
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yuk1ty/rusty-monad" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuk1ty%2Frusty-monad", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuk1ty%2Frusty-monad'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 279a33f8d8a843e76ef4d7e62f35813909bba26a
[INFO] testing yuk1ty/rusty-monad against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuk1ty%2Frusty-monad" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yuk1ty/rusty-monad on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yuk1ty/rusty-monad
[INFO] finished tweaking git repo https://github.com/yuk1ty/rusty-monad
[INFO] tweaked toml for git repo https://github.com/yuk1ty/rusty-monad written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/yuk1ty/rusty-monad already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", 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] 537ee8446be788ffe6027fbc3f1966852e0a9aceff4c6baa7ce88458a3d06ee9
[INFO] running `Command { std: "docker" "start" "-a" "537ee8446be788ffe6027fbc3f1966852e0a9aceff4c6baa7ce88458a3d06ee9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "537ee8446be788ffe6027fbc3f1966852e0a9aceff4c6baa7ce88458a3d06ee9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "537ee8446be788ffe6027fbc3f1966852e0a9aceff4c6baa7ce88458a3d06ee9", kill_on_drop: false }`
[INFO] [stdout] 537ee8446be788ffe6027fbc3f1966852e0a9aceff4c6baa7ce88458a3d06ee9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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] 9640af0e6e557d9b2ecadd1ca9f830b9b5e06aad1af56ed9bce3f1bf209e546d
[INFO] running `Command { std: "docker" "start" "-a" "9640af0e6e557d9b2ecadd1ca9f830b9b5e06aad1af56ed9bce3f1bf209e546d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rusty-monad v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `applicative::Applicative`, `functor::Functor`, `functor::Pointed`, `monad::Monad`
[INFO] [stdout]  --> src/data/list.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / macro_rules! mdo {
[INFO] [stdout] 10 | |     ($i:ident <- $e:expr; $($t:tt)*) => {
[INFO] [stdout] 11 | |         $e.bind(move |$i| mdo!($($t)*))
[INFO] [stdout] 12 | |     };
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |     };
[INFO] [stdout] 19 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::data::option::*`
[INFO] [stdout]   --> src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     use crate::data::option::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `applicative::Applicative`, `functor::Functor`, `functor::Pointed`, `monad::Monad`
[INFO] [stdout]   --> src/lib.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |     use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/data/option.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn bind<B, F>(self, mut f: F) -> Option<B>
[INFO] [stdout]   |                         ----^
[INFO] [stdout]   |                         |
[INFO] [stdout]   |                         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data/option.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn map<F, B>(self, mut f: F) -> Option<B>
[INFO] [stdout]    |                        ----^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data/result.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn map<F, B>(self, mut f: F) -> Result<B, E>
[INFO] [stdout]    |                        ----^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9640af0e6e557d9b2ecadd1ca9f830b9b5e06aad1af56ed9bce3f1bf209e546d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9640af0e6e557d9b2ecadd1ca9f830b9b5e06aad1af56ed9bce3f1bf209e546d", kill_on_drop: false }`
[INFO] [stdout] 9640af0e6e557d9b2ecadd1ca9f830b9b5e06aad1af56ed9bce3f1bf209e546d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--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] 6aab1e7ddf5d77e28015efb06c89d1d58c2c754b6b0a0525792c8a497e4e2ffd
[INFO] running `Command { std: "docker" "start" "-a" "6aab1e7ddf5d77e28015efb06c89d1d58c2c754b6b0a0525792c8a497e4e2ffd", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `applicative::Applicative`, `functor::Functor`, `functor::Pointed`, `monad::Monad`
[INFO] [stdout]  --> src/data/list.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rusty-monad v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / macro_rules! mdo {
[INFO] [stdout] 10 | |     ($i:ident <- $e:expr; $($t:tt)*) => {
[INFO] [stdout] 11 | |         $e.bind(move |$i| mdo!($($t)*))
[INFO] [stdout] 12 | |     };
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |     };
[INFO] [stdout] 19 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::data::option::*`
[INFO] [stdout]   --> src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     use crate::data::option::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `applicative::Applicative`, `functor::Functor`, `functor::Pointed`, `monad::Monad`
[INFO] [stdout]   --> src/lib.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |     use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/data/option.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn bind<B, F>(self, mut f: F) -> Option<B>
[INFO] [stdout]   |                         ----^
[INFO] [stdout]   |                         |
[INFO] [stdout]   |                         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data/option.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn map<F, B>(self, mut f: F) -> Option<B>
[INFO] [stdout]    |                        ----^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data/result.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn map<F, B>(self, mut f: F) -> Result<B, E>
[INFO] [stdout]    |                        ----^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `applicative::Applicative`, `functor::Functor`, `functor::Pointed`, `monad::Monad`
[INFO] [stdout]  --> src/data/list.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::data::option::*`
[INFO] [stdout]   --> src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     use crate::data::option::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `applicative::Applicative`, `functor::Functor`
[INFO] [stdout]   --> src/lib.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |     use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super`
[INFO] [stdout]   --> src/data/option.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     use super::*;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/data/option.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn bind<B, F>(self, mut f: F) -> Option<B>
[INFO] [stdout]   |                         ----^
[INFO] [stdout]   |                         |
[INFO] [stdout]   |                         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data/option.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn map<F, B>(self, mut f: F) -> Option<B>
[INFO] [stdout]    |                        ----^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data/result.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn map<F, B>(self, mut f: F) -> Result<B, E>
[INFO] [stdout]    |                        ----^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/data/option.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |             name: String,
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "6aab1e7ddf5d77e28015efb06c89d1d58c2c754b6b0a0525792c8a497e4e2ffd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6aab1e7ddf5d77e28015efb06c89d1d58c2c754b6b0a0525792c8a497e4e2ffd", kill_on_drop: false }`
[INFO] [stdout] 6aab1e7ddf5d77e28015efb06c89d1d58c2c754b6b0a0525792c8a497e4e2ffd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ce1a25a4f2efb3221ecdeb7148634ab2c74a070b0df4b7deb0396873eaed9afd
[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" "ce1a25a4f2efb3221ecdeb7148634ab2c74a070b0df4b7deb0396873eaed9afd", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `applicative::Applicative`, `functor::Functor`, `functor::Pointed`, `monad::Monad`
[INFO] [stderr]  --> src/data/list.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stderr]   |             ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | / macro_rules! mdo {
[INFO] [stderr] 10 | |     ($i:ident <- $e:expr; $($t:tt)*) => {
[INFO] [stderr] 11 | |         $e.bind(move |$i| mdo!($($t)*))
[INFO] [stderr] 12 | |     };
[INFO] [stderr] ...  |
[INFO] [stderr] 18 | |     };
[INFO] [stderr] 19 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::data::option::*`
[INFO] [stderr]   --> src/lib.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     use crate::data::option::*;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `applicative::Applicative`, `functor::Functor`, `functor::Pointed`, `monad::Monad`
[INFO] [stderr]   --> src/lib.rs:23:17
[INFO] [stderr]    |
[INFO] [stderr] 23 |     use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/data/option.rs:4:25
[INFO] [stderr]   |
[INFO] [stderr] 4 |     fn bind<B, F>(self, mut f: F) -> Option<B>
[INFO] [stderr]   |                         ----^
[INFO] [stderr]   |                         |
[INFO] [stderr]   |                         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/data/option.rs:33:24
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn map<F, B>(self, mut f: F) -> Option<B>
[INFO] [stderr]    |                        ----^
[INFO] [stderr]    |                        |
[INFO] [stderr]    |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/data/result.rs:33:24
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn map<F, B>(self, mut f: F) -> Result<B, E>
[INFO] [stderr]    |                        ----^
[INFO] [stderr]    |                        |
[INFO] [stderr]    |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-monad` (lib) generated 7 warnings
[INFO] [stderr] warning: unused imports: `applicative::Applicative`, `functor::Functor`
[INFO] [stderr]   --> src/lib.rs:23:17
[INFO] [stderr]    |
[INFO] [stderr] 23 |     use crate::{applicative::Applicative, functor::Functor, functor::Pointed, monad::Monad};
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super`
[INFO] [stderr]   --> src/data/option.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     use super::*;
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `name`
[INFO] [stderr]   --> src/data/option.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |             name: String,
[INFO] [stderr]    |             ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-monad` (lib test) generated 8 warnings (5 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rusty_monad-378727ee178f954b)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]    Doc-tests rusty-monad
[INFO] [stdout] test data::option::option_test::test_option_monad ... ok
[INFO] [stdout] test test_do::test_do_notation ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[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" "ce1a25a4f2efb3221ecdeb7148634ab2c74a070b0df4b7deb0396873eaed9afd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce1a25a4f2efb3221ecdeb7148634ab2c74a070b0df4b7deb0396873eaed9afd", kill_on_drop: false }`
[INFO] [stdout] ce1a25a4f2efb3221ecdeb7148634ab2c74a070b0df4b7deb0396873eaed9afd