[INFO] fetching crate kik_sync_service 0.7.3...
[INFO] checking kik_sync_service-0.7.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate kik_sync_service 0.7.3 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate kik_sync_service 0.7.3 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kik_sync_service 0.7.3
[INFO] finished tweaking crates.io crate kik_sync_service 0.7.3
[INFO] tweaked toml for crates.io crate kik_sync_service 0.7.3 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1bffad15b3a3169f841e9ea22adbf45aa76db72a3f3fa8c6b2b058994585bc89
[INFO] running `Command { std: "docker" "start" "-a" "1bffad15b3a3169f841e9ea22adbf45aa76db72a3f3fa8c6b2b058994585bc89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1bffad15b3a3169f841e9ea22adbf45aa76db72a3f3fa8c6b2b058994585bc89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bffad15b3a3169f841e9ea22adbf45aa76db72a3f3fa8c6b2b058994585bc89", kill_on_drop: false }`
[INFO] [stdout] 1bffad15b3a3169f841e9ea22adbf45aa76db72a3f3fa8c6b2b058994585bc89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f537ae0256962df677478c69b2c3efe1742b02ed918f9c7f0b491b41dbbe62e
[INFO] running `Command { std: "docker" "start" "-a" "3f537ae0256962df677478c69b2c3efe1742b02ed918f9c7f0b491b41dbbe62e", kill_on_drop: false }`
[INFO] [stderr]     Checking kik_sync_service v0.7.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/kik_message.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/kik_message.rs:17:25
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/kik_channel.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/kik_message.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/kik_message.rs:17:25
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/kik_channel.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:272:21
[INFO] [stdout]     |
[INFO] [stdout] 272 |                     std::mem::drop(&lock);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^-----^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    argument has type `&MutexGuard<'_, std::sync::mpsc::Receiver<S>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:286:9
[INFO] [stdout]     |
[INFO] [stdout] 286 |         std::mem::drop(&self.rx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Arc<Mutex<std::sync::mpsc::Receiver<S>>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         std::mem::drop(&self.feeder);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&FeederRecycler<T, R, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 288 |         std::mem::drop(&self.tx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |         std::mem::drop(&self.thread_vec);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Vec<JoinHandle<()>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/kik_worker.rs:95:45
[INFO] [stdout]    |
[INFO] [stdout] 95 | ...                   std::mem::drop(self);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^----^
[INFO] [stdout]    |                                      |
[INFO] [stdout]    |                                      argument has type `&Worker<T, R, S>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:108:21
[INFO] [stdout]     |
[INFO] [stdout] 108 |                     std::mem::drop(self);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    argument has type `&Worker<T, R, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |         std::mem::drop(&self.tx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |         std::mem::drop(&self.rx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&std::sync::Weak<Mutex<std::sync::mpsc::Receiver<S>>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |         std::mem::drop(&self.input_vec);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^---------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Vec<R>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |         std::mem::drop(&self.rx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&std::sync::mpsc::Receiver<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         std::mem::drop(&self.tx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:272:21
[INFO] [stdout]     |
[INFO] [stdout] 272 |                     std::mem::drop(&lock);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^-----^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    argument has type `&MutexGuard<'_, std::sync::mpsc::Receiver<S>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:286:9
[INFO] [stdout]     |
[INFO] [stdout] 286 |         std::mem::drop(&self.rx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Arc<Mutex<std::sync::mpsc::Receiver<S>>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         std::mem::drop(&self.feeder);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&FeederRecycler<T, R, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 288 |         std::mem::drop(&self.tx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |         std::mem::drop(&self.thread_vec);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Vec<JoinHandle<()>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/kik_worker.rs:95:45
[INFO] [stdout]    |
[INFO] [stdout] 95 | ...                   std::mem::drop(self);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^----^
[INFO] [stdout]    |                                      |
[INFO] [stdout]    |                                      argument has type `&Worker<T, R, S>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:108:21
[INFO] [stdout]     |
[INFO] [stdout] 108 |                     std::mem::drop(self);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    argument has type `&Worker<T, R, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |         std::mem::drop(&self.tx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |         std::mem::drop(&self.rx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&std::sync::Weak<Mutex<std::sync::mpsc::Receiver<S>>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |         std::mem::drop(&self.input_vec);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^---------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Vec<R>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |         std::mem::drop(&self.rx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&std::sync::mpsc::Receiver<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         std::mem::drop(&self.tx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "3f537ae0256962df677478c69b2c3efe1742b02ed918f9c7f0b491b41dbbe62e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f537ae0256962df677478c69b2c3efe1742b02ed918f9c7f0b491b41dbbe62e", kill_on_drop: false }`
[INFO] [stdout] 3f537ae0256962df677478c69b2c3efe1742b02ed918f9c7f0b491b41dbbe62e
[INFO] checking kik_sync_service-0.7.3 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate kik_sync_service 0.7.3 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate kik_sync_service 0.7.3 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kik_sync_service 0.7.3
[INFO] finished tweaking crates.io crate kik_sync_service 0.7.3
[INFO] tweaked toml for crates.io crate kik_sync_service 0.7.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71d007e2f3d08c51607af60ad2c2407fd6e80655c520d14f1f78eef1ce6540ac
[INFO] running `Command { std: "docker" "start" "-a" "71d007e2f3d08c51607af60ad2c2407fd6e80655c520d14f1f78eef1ce6540ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71d007e2f3d08c51607af60ad2c2407fd6e80655c520d14f1f78eef1ce6540ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71d007e2f3d08c51607af60ad2c2407fd6e80655c520d14f1f78eef1ce6540ac", kill_on_drop: false }`
[INFO] [stdout] 71d007e2f3d08c51607af60ad2c2407fd6e80655c520d14f1f78eef1ce6540ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e593f13a82fa678cbdc43fa9e878e79bd3834b9bd81045f3a4e00df343520247
[INFO] running `Command { std: "docker" "start" "-a" "e593f13a82fa678cbdc43fa9e878e79bd3834b9bd81045f3a4e00df343520247", kill_on_drop: false }`
[INFO] [stderr]     Checking kik_sync_service v0.7.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/kik_message.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/kik_message.rs:17:25
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/kik_channel.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/kik_message.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/kik_message.rs:17:25
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/kik_channel.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:272:21
[INFO] [stdout]     |
[INFO] [stdout] 272 |                     std::mem::drop(&lock);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^-----^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    argument has type `&MutexGuard<'_, std::sync::mpsc::Receiver<S>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:286:9
[INFO] [stdout]     |
[INFO] [stdout] 286 |         std::mem::drop(&self.rx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Arc<Mutex<std::sync::mpsc::Receiver<S>>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         std::mem::drop(&self.feeder);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&FeederRecycler<T, R, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 288 |         std::mem::drop(&self.tx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |         std::mem::drop(&self.thread_vec);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Vec<JoinHandle<()>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/kik_worker.rs:95:45
[INFO] [stdout]    |
[INFO] [stdout] 95 | ...                   std::mem::drop(self);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^----^
[INFO] [stdout]    |                                      |
[INFO] [stdout]    |                                      argument has type `&Worker<T, R, S>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:108:21
[INFO] [stdout]     |
[INFO] [stdout] 108 |                     std::mem::drop(self);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    argument has type `&Worker<T, R, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |         std::mem::drop(&self.tx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |         std::mem::drop(&self.rx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&std::sync::Weak<Mutex<std::sync::mpsc::Receiver<S>>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |         std::mem::drop(&self.input_vec);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^---------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Vec<R>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |         std::mem::drop(&self.rx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&std::sync::mpsc::Receiver<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         std::mem::drop(&self.tx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:272:21
[INFO] [stdout]     |
[INFO] [stdout] 272 |                     std::mem::drop(&lock);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^-----^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    argument has type `&MutexGuard<'_, std::sync::mpsc::Receiver<S>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:286:9
[INFO] [stdout]     |
[INFO] [stdout] 286 |         std::mem::drop(&self.rx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Arc<Mutex<std::sync::mpsc::Receiver<S>>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         std::mem::drop(&self.feeder);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&FeederRecycler<T, R, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:288:9
[INFO] [stdout]     |
[INFO] [stdout] 288 |         std::mem::drop(&self.tx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_channel.rs:289:9
[INFO] [stdout]     |
[INFO] [stdout] 289 |         std::mem::drop(&self.thread_vec);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Vec<JoinHandle<()>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/kik_worker.rs:95:45
[INFO] [stdout]    |
[INFO] [stdout] 95 | ...                   std::mem::drop(self);
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^----^
[INFO] [stdout]    |                                      |
[INFO] [stdout]    |                                      argument has type `&Worker<T, R, S>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:108:21
[INFO] [stdout]     |
[INFO] [stdout] 108 |                     std::mem::drop(self);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^----^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    argument has type `&Worker<T, R, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |         std::mem::drop(&self.tx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_worker.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |         std::mem::drop(&self.rx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&std::sync::Weak<Mutex<std::sync::mpsc::Receiver<S>>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |         std::mem::drop(&self.input_vec);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^---------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&Vec<R>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |         std::mem::drop(&self.rx_deliverer);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^------------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&std::sync::mpsc::Receiver<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/kik_feeder.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         std::mem::drop(&self.tx_inserter);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^-----------------^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        argument has type `&SyncSender<S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "e593f13a82fa678cbdc43fa9e878e79bd3834b9bd81045f3a4e00df343520247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e593f13a82fa678cbdc43fa9e878e79bd3834b9bd81045f3a4e00df343520247", kill_on_drop: false }`
[INFO] [stdout] e593f13a82fa678cbdc43fa9e878e79bd3834b9bd81045f3a4e00df343520247