[INFO] fetching crate rxs 0.1.0...
[INFO] building rxs-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate rxs 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate rxs 0.1.0
[INFO] finished tweaking crates.io crate rxs 0.1.0
[INFO] tweaked toml for crates.io crate rxs 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rxs 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 10 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_test v1.0.177
[INFO] [stderr]   Downloaded serde v1.0.228
[INFO] [stderr]   Downloaded smallvec v1.15.1
[INFO] [stderr]   Downloaded derive-where v1.6.0
[INFO] [stderr]   Downloaded serde_derive v1.0.228
[INFO] [stderr]   Downloaded serde_core v1.0.228
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc6bba02021dc538b8f00b3f0e0b6facc15cdc95b7f4f88c338c1bf788610cca
[INFO] running `Command { std: "docker" "start" "-a" "dc6bba02021dc538b8f00b3f0e0b6facc15cdc95b7f4f88c338c1bf788610cca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc6bba02021dc538b8f00b3f0e0b6facc15cdc95b7f4f88c338c1bf788610cca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc6bba02021dc538b8f00b3f0e0b6facc15cdc95b7f4f88c338c1bf788610cca", kill_on_drop: false }`
[INFO] [stdout] dc6bba02021dc538b8f00b3f0e0b6facc15cdc95b7f4f88c338c1bf788610cca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a7beed3b52d08160e133e6be9a136cbc67a54587ef96a9960d0b746987b4be3
[INFO] running `Command { std: "docker" "start" "-a" "3a7beed3b52d08160e133e6be9a136cbc67a54587ef96a9960d0b746987b4be3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling derive-where v1.6.0
[INFO] [stderr]    Compiling rxs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/observable/combine_latest.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use alloc::boxed::Box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ops::Deref`
[INFO] [stdout]   --> src/observable/combine_latest.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use core::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::Borrow`
[INFO] [stdout]  --> src/observable/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use core::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ops::Deref`
[INFO] [stdout]   --> src/observable/mod.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use core::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt::Debug`
[INFO] [stdout]  --> src/observer/transform.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UnaryClosure`
[INFO] [stdout]  --> src/subject/transform.rs:4:37
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::transform::{Transformer, UnaryClosure};
[INFO] [stdout]   |                                     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::cell::RefCell`
[INFO] [stdout]  --> src/subscription.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use core::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::Borrow`
[INFO] [stdout]  --> src/transform/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::BorrowMut`
[INFO] [stdout]  --> src/recorder.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/subject/behavior.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl<T: ?Sized + ToOwned + Debug> BehaviorSubject<T> {
[INFO] [stdout]    | ---------------------------------------------------- method in this implementation
[INFO] [stdout] 52 |     fn value(&self) -> T::Owned {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_inner` is never used
[INFO] [stdout]   --> src/subject/unite.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<ER, ABLE> UniteSubject<ER, ABLE> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 28 |     fn into_inner(self) -> (ER, ABLE) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.95s
[INFO] running `Command { std: "docker" "inspect" "3a7beed3b52d08160e133e6be9a136cbc67a54587ef96a9960d0b746987b4be3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a7beed3b52d08160e133e6be9a136cbc67a54587ef96a9960d0b746987b4be3", kill_on_drop: false }`
[INFO] [stdout] 3a7beed3b52d08160e133e6be9a136cbc67a54587ef96a9960d0b746987b4be3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bd162c60b90c9125f7800403e956caafd0de5933fc82f966a415809141ebdc3
[INFO] running `Command { std: "docker" "start" "-a" "6bd162c60b90c9125f7800403e956caafd0de5933fc82f966a415809141ebdc3", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/observable/combine_latest.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use alloc::boxed::Box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ops::Deref`
[INFO] [stdout]   --> src/observable/combine_latest.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use core::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::Borrow`
[INFO] [stdout]  --> src/observable/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use core::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ops::Deref`
[INFO] [stdout]   --> src/observable/mod.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use core::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt::Debug`
[INFO] [stdout]  --> src/observer/transform.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UnaryClosure`
[INFO] [stdout]  --> src/subject/transform.rs:4:37
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::transform::{Transformer, UnaryClosure};
[INFO] [stdout]   |                                     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::cell::RefCell`
[INFO] [stdout]  --> src/subscription.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use core::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::Borrow`
[INFO] [stdout]  --> src/transform/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::BorrowMut`
[INFO] [stdout]  --> src/recorder.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/subject/behavior.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl<T: ?Sized + ToOwned + Debug> BehaviorSubject<T> {
[INFO] [stdout]    | ---------------------------------------------------- method in this implementation
[INFO] [stdout] 52 |     fn value(&self) -> T::Owned {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_inner` is never used
[INFO] [stdout]   --> src/subject/unite.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<ER, ABLE> UniteSubject<ER, ABLE> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 28 |     fn into_inner(self) -> (ER, ABLE) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde_test v1.0.177
[INFO] [stderr]    Compiling rxs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `alloc::boxed::Box`
[INFO] [stdout]  --> src/observable/combine_latest.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use alloc::boxed::Box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ops::Deref`
[INFO] [stdout]   --> src/observable/combine_latest.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use core::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::Borrow`
[INFO] [stdout]  --> src/observable/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use core::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::ops::Deref`
[INFO] [stdout]   --> src/observable/mod.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use core::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::Borrow`
[INFO] [stdout]   --> src/observable/mod.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     use core::borrow::Borrow;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt::Debug`
[INFO] [stdout]  --> src/observer/transform.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::string::String`
[INFO] [stdout]   --> src/observer/mod.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     use alloc::string::String;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::string::ToString`
[INFO] [stdout]    --> src/subject/behavior.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 |     use alloc::string::ToString;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_test::Token`
[INFO] [stdout]    --> src/subject/behavior.rs:154:9
[INFO] [stdout]     |
[INFO] [stdout] 154 |     use serde_test::Token;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UnaryClosure`
[INFO] [stdout]  --> src/subject/transform.rs:4:37
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::transform::{Transformer, UnaryClosure};
[INFO] [stdout]   |                                     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::cell::RefCell`
[INFO] [stdout]  --> src/subscription.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use core::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::Borrow`
[INFO] [stdout]  --> src/transform/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::borrow::BorrowMut`
[INFO] [stdout]  --> src/recorder.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/subject/passthrough.rs:121:19
[INFO] [stdout]     |
[INFO] [stdout] 121 |             move |val: &u8| {
[INFO] [stdout]     |                   ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/subject/mod.rs:141:22
[INFO] [stdout]     |
[INFO] [stdout] 141 |         fn test_type(s: &impl Subject<str>) {}
[INFO] [stdout]     |                      ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_inner` is never used
[INFO] [stdout]   --> src/subject/unite.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<ER, ABLE> UniteSubject<ER, ABLE> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 28 |     fn into_inner(self) -> (ER, ABLE) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.06s
[INFO] running `Command { std: "docker" "inspect" "6bd162c60b90c9125f7800403e956caafd0de5933fc82f966a415809141ebdc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bd162c60b90c9125f7800403e956caafd0de5933fc82f966a415809141ebdc3", kill_on_drop: false }`
[INFO] [stdout] 6bd162c60b90c9125f7800403e956caafd0de5933fc82f966a415809141ebdc3