[INFO] fetching crate rust_m_queue 1.0.5-alpha.1...
[INFO] testing rust_m_queue-1.0.5-alpha.1 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate rust_m_queue 1.0.5-alpha.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate rust_m_queue 1.0.5-alpha.1
[INFO] finished tweaking crates.io crate rust_m_queue 1.0.5-alpha.1
[INFO] tweaked toml for crates.io crate rust_m_queue 1.0.5-alpha.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_m_queue 1.0.5-alpha.1 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v2.0.1)
[INFO] [stderr]       Adding nix v0.29.0 (available: v0.30.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e7863fd1aae79607ee2a67515f8208152e111b629a67924b5f1a4c0136f880b
[INFO] running `Command { std: "docker" "start" "-a" "1e7863fd1aae79607ee2a67515f8208152e111b629a67924b5f1a4c0136f880b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e7863fd1aae79607ee2a67515f8208152e111b629a67924b5f1a4c0136f880b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e7863fd1aae79607ee2a67515f8208152e111b629a67924b5f1a4c0136f880b", kill_on_drop: false }`
[INFO] [stdout] 1e7863fd1aae79607ee2a67515f8208152e111b629a67924b5f1a4c0136f880b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9ff2f56f6a8cceb2a61b183e7c7406826a99b36a3d363fb3855b04386e570b2
[INFO] running `Command { std: "docker" "start" "-a" "a9ff2f56f6a8cceb2a61b183e7c7406826a99b36a3d363fb3855b04386e570b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg_aliases v0.2.1
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling nix v0.29.0
[INFO] [stderr]    Compiling rust_m_queue v1.0.5-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `nix::mqueue::MqAttr`
[INFO] [stdout]  --> src/sender.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use nix::mqueue::MqAttr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/receiver.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         mq_close(descriptor);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let _ = mq_close(descriptor);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/receiver.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         mq_unlink(self.name);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let _ = mq_unlink(self.name);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/sender.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         mq_close(descriptor);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let _ = mq_close(descriptor);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.24s
[INFO] running `Command { std: "docker" "inspect" "a9ff2f56f6a8cceb2a61b183e7c7406826a99b36a3d363fb3855b04386e570b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9ff2f56f6a8cceb2a61b183e7c7406826a99b36a3d363fb3855b04386e570b2", kill_on_drop: false }`
[INFO] [stdout] a9ff2f56f6a8cceb2a61b183e7c7406826a99b36a3d363fb3855b04386e570b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b41d3414620167bc81264fef3ee49e8ce7b373e11fa826cce4686b13d6be209
[INFO] running `Command { std: "docker" "start" "-a" "9b41d3414620167bc81264fef3ee49e8ce7b373e11fa826cce4686b13d6be209", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `nix::mqueue::MqAttr`
[INFO] [stdout]  --> src/sender.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use nix::mqueue::MqAttr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/receiver.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         mq_close(descriptor);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let _ = mq_close(descriptor);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_m_queue v1.0.5-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/receiver.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         mq_unlink(self.name);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let _ = mq_unlink(self.name);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/sender.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         mq_close(descriptor);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let _ = mq_close(descriptor);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nix::mqueue::MqAttr`
[INFO] [stdout]  --> src/sender.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use nix::mqueue::MqAttr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/receiver.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |         mq_close(descriptor);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let _ = mq_close(descriptor);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/receiver.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         mq_unlink(self.name);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let _ = mq_unlink(self.name);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/sender.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         mq_close(descriptor);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let _ = mq_close(descriptor);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/sender.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |         mq_unlink(QUEUE_NAME);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 112 |         let _ = mq_unlink(QUEUE_NAME);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/sender.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 |         mq_unlink(QUEUE_NAME);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 128 |         let _ = mq_unlink(QUEUE_NAME);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "9b41d3414620167bc81264fef3ee49e8ce7b373e11fa826cce4686b13d6be209", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b41d3414620167bc81264fef3ee49e8ce7b373e11fa826cce4686b13d6be209", kill_on_drop: false }`
[INFO] [stdout] 9b41d3414620167bc81264fef3ee49e8ce7b373e11fa826cce4686b13d6be209
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 00707bc43333ae7a7a3c61b93df603cc75a922f017b3b38e9084c646c4756333
[INFO] running `Command { std: "docker" "start" "-a" "00707bc43333ae7a7a3c61b93df603cc75a922f017b3b38e9084c646c4756333", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `nix::mqueue::MqAttr`
[INFO] [stderr]  --> src/sender.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use nix::mqueue::MqAttr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/receiver.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         mq_close(descriptor);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let _ = mq_close(descriptor);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/receiver.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |         mq_unlink(self.name);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 74 |         let _ = mq_unlink(self.name);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/sender.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         mq_close(descriptor);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let _ = mq_close(descriptor);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/sender.rs:112:9
[INFO] [stderr]     |
[INFO] [stderr] 112 |         mq_unlink(QUEUE_NAME);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let _ = mq_unlink(QUEUE_NAME);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/sender.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 |         mq_unlink(QUEUE_NAME);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 128 |         let _ = mq_unlink(QUEUE_NAME);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_m_queue` (lib) generated 4 warnings (run `cargo fix --lib -p rust_m_queue` to apply 1 suggestion)
[INFO] [stderr] warning: `rust_m_queue` (lib test) generated 6 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_m_queue-7b945e0b18f055e9)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test receiver::tests::test_receive ... ok
[INFO] [stdout] test receiver::tests::test_success_create ... ok
[INFO] [stdout] test sender::tests::test_success_connect ... ok
[INFO] [stdout] test sender::tests::test_send_success ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_m_queue
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/sender.rs - sender::IpcSender<MESSAGE_SIZE>::connect_to_queue (line 20) ... FAILED
[INFO] [stdout] test src/sender.rs - sender::IpcSender<MESSAGE_SIZE>::send (line 38) ... FAILED
[INFO] [stdout] test src/receiver.rs - receiver::IpcReceiver<MESSAGE_SIZE>::init (line 19) ... FAILED
[INFO] [stdout] test src/receiver.rs - receiver::IpcReceiver<MESSAGE_SIZE>::receive (line 42) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/sender.rs - sender::IpcSender<MESSAGE_SIZE>::connect_to_queue (line 20) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/sender.rs:26:69
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_sender_rs_20_0() {
[INFO] [stdout]   |                                      ------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 9 | let sender = IpcSender::<MESSAGE_SIZE>::connect_to_queue(QUEUE_NAME)?;
[INFO] [stdout]   |                                                                     ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_sender_rs_20_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use rust_m_queue::sender::IpcSender;
[INFO] [stdout] ...
[INFO] [stdout] 9 | let sender = IpcSender::<MESSAGE_SIZE>::connect_to_queue(QUEUE_NAME)?;
[INFO] [stdout] 10+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/sender.rs - sender::IpcSender<MESSAGE_SIZE>::send (line 38) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/sender.rs:49:69
[INFO] [stdout]    |
[INFO] [stdout]  4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_sender_rs_38_0() {
[INFO] [stdout]    |                                      ------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 14 | let sender = IpcSender::<MESSAGE_SIZE>::connect_to_queue(QUEUE_NAME)?;
[INFO] [stdout]    |                                                                     ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout]  4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_sender_rs_38_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]  5 | use serde::Serialize;
[INFO] [stdout] ...
[INFO] [stdout] 19 | sender.send(message, priority)?;
[INFO] [stdout] 20 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/sender.rs:54:31
[INFO] [stdout]    |
[INFO] [stdout]  4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_sender_rs_38_0() {
[INFO] [stdout]    |                                      ------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 19 | sender.send(message, priority)?;
[INFO] [stdout]    |                               ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout]  4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_sender_rs_38_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]  5 | use serde::Serialize;
[INFO] [stdout] ...
[INFO] [stdout] 19 | sender.send(message, priority)?;
[INFO] [stdout] 20 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/receiver.rs - receiver::IpcReceiver<MESSAGE_SIZE>::init (line 19) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]  --> src/receiver.rs:25:69
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_receiver_rs_19_0() {
[INFO] [stdout]   |                                      --------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 9 | let mut receiver = IpcReceiver::<MESSAGE_SIZE>::init(QUEUE_NAME, 10)?;
[INFO] [stdout]   |                                                                     ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]   |
[INFO] [stdout] 4 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_receiver_rs_19_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 | use rust_m_queue::receiver::IpcReceiver;
[INFO] [stdout] ...
[INFO] [stdout] 9 | let mut receiver = IpcReceiver::<MESSAGE_SIZE>::init(QUEUE_NAME, 10)?;
[INFO] [stdout] 10+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/receiver.rs - receiver::IpcReceiver<MESSAGE_SIZE>::receive (line 42) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/receiver.rs:53:69
[INFO] [stdout]    |
[INFO] [stdout]  4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_receiver_rs_42_0() {
[INFO] [stdout]    |                                      --------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 14 | let mut receiver = IpcReceiver::<MESSAGE_SIZE>::init(QUEUE_NAME, 10)?;
[INFO] [stdout]    |                                                                     ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout]  4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_receiver_rs_42_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]    |                                                                              +++++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/receiver.rs:55:44
[INFO] [stdout]    |
[INFO] [stdout]  4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_receiver_rs_42_0() {
[INFO] [stdout]    |                                      --------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 16 |    let data = receiver.receive::<Message>()?; //thread blocking
[INFO] [stdout]    |                                            ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout]  4 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_receiver_rs_42_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]    |                                                                              +++++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/receiver.rs - receiver::IpcReceiver<MESSAGE_SIZE>::init (line 19)
[INFO] [stdout]     src/receiver.rs - receiver::IpcReceiver<MESSAGE_SIZE>::receive (line 42)
[INFO] [stdout]     src/sender.rs - sender::IpcSender<MESSAGE_SIZE>::connect_to_queue (line 20)
[INFO] [stdout]     src/sender.rs - sender::IpcSender<MESSAGE_SIZE>::send (line 38)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "00707bc43333ae7a7a3c61b93df603cc75a922f017b3b38e9084c646c4756333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00707bc43333ae7a7a3c61b93df603cc75a922f017b3b38e9084c646c4756333", kill_on_drop: false }`
[INFO] [stdout] 00707bc43333ae7a7a3c61b93df603cc75a922f017b3b38e9084c646c4756333