[INFO] fetching crate paho-mqtt 0.12.3...
[INFO] checking paho-mqtt-0.12.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate paho-mqtt 0.12.3 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate paho-mqtt 0.12.3 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 paho-mqtt 0.12.3
[INFO] finished tweaking crates.io crate paho-mqtt 0.12.3
[INFO] tweaked toml for crates.io crate paho-mqtt 0.12.3 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate paho-mqtt 0.12.3 already has a lockfile, it will not be regenerated
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded value-bag v1.4.2
[INFO] [stderr]   Downloaded bindgen v0.64.0
[INFO] [stderr]   Downloaded paho-mqtt-sys v0.9.0
[INFO] [stderr]   Downloaded openssl-src v300.1.5+3.1.3
[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] db9ec07e20005d9e09eb2e6993fde487a824741447976f2d3d037412492f2cbf
[INFO] running `Command { std: "docker" "start" "-a" "db9ec07e20005d9e09eb2e6993fde487a824741447976f2d3d037412492f2cbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db9ec07e20005d9e09eb2e6993fde487a824741447976f2d3d037412492f2cbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db9ec07e20005d9e09eb2e6993fde487a824741447976f2d3d037412492f2cbf", kill_on_drop: false }`
[INFO] [stdout] db9ec07e20005d9e09eb2e6993fde487a824741447976f2d3d037412492f2cbf
[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] 127cc0c21851283c3ad1d73ec92dae78d348acd735cae5ab7d640775a5babd96
[INFO] running `Command { std: "docker" "start" "-a" "127cc0c21851283c3ad1d73ec92dae78d348acd735cae5ab7d640775a5babd96", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking value-bag v1.4.2
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling rustix v0.37.26
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]     Checking async-task v4.5.0
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking termcolor v1.3.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking concurrent-queue v2.3.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking async-channel v1.9.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]     Checking blocking v1.4.1
[INFO] [stderr]     Checking async-executor v1.6.0
[INFO] [stderr]    Compiling cmake v0.1.50
[INFO] [stderr]     Checking io-lifetimes v1.0.11
[INFO] [stderr]     Checking socket2 v0.4.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling openssl-sys v0.9.93
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]    Compiling paho-mqtt-sys v0.9.0
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking ctrlc v3.4.1
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling thiserror-impl v1.0.50
[INFO] [stderr]    Compiling serde_derive v1.0.189
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking async-global-executor v2.3.1
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking paho-mqtt v0.12.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/async_client.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/create_options.rs:30:71
[INFO] [stdout]    |
[INFO] [stdout] 30 |     async_client::AsyncClient, client_persistence::ClientPersistence, ffi, to_c_bool, Result,
[INFO] [stdout]    |                                                                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/connect_options.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     ffi, from_c_bool,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/will_options.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/ssl_options.rs:31:29
[INFO] [stdout]    |
[INFO] [stdout] 31 | use crate::{errors::Result, ffi, from_c_bool, to_c_bool};
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/disconnect_options.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/subscribe_options.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 | use crate::{ffi, from_c_bool, to_c_bool, Error, Result};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/subscribe_options.rs:28:11
[INFO] [stdout]    |
[INFO] [stdout] 28 | use std::{convert::TryFrom, fmt};
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/response_options.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/server_response.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 | use crate::{ffi, from_c_bool, properties::Properties, reason_code::ReasonCode};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/properties.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     convert::TryFrom,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/properties.rs:35:29
[INFO] [stdout]    |
[INFO] [stdout] 35 | use crate::{errors::Result, ffi};
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]   --> src/message.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 | use std::{borrow::Cow, convert::From, ffi::CString, fmt, os::raw::c_void, pin::Pin, slice};
[INFO] [stdout]    |                        ^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/message.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crate::{ffi, properties::Properties, to_c_bool};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/token.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         ffi,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/client_persistence.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 | use crate::{errors::Result, ffi, to_c_bool};
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crate::{ffi, message::Message, reason_code::ReasonCode};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/c_trace.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use crate::ffi;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/async_client.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Arc` is imported redundantly
[INFO] [stdout]     --> src/async_client.rs:1230:21
[INFO] [stdout]      |
[INFO] [stdout] 1228 |     use super::*;
[INFO] [stdout]      |         -------- the item `Arc` is already imported here
[INFO] [stdout] 1229 |     use crate::create_options::CreateOptionsBuilder;
[INFO] [stdout] 1230 |     use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]      |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Mutex` is imported redundantly
[INFO] [stdout]     --> src/async_client.rs:1230:26
[INFO] [stdout]      |
[INFO] [stdout] 1228 |     use super::*;
[INFO] [stdout]      |         -------- the item `Mutex` is already imported here
[INFO] [stdout] 1229 |     use crate::create_options::CreateOptionsBuilder;
[INFO] [stdout] 1230 |     use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]      |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/subscribe_options.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 | use crate::{ffi, from_c_bool, to_c_bool, Error, Result};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/subscribe_options.rs:28:11
[INFO] [stdout]    |
[INFO] [stdout] 28 | use std::{convert::TryFrom, fmt};
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/response_options.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Token` is imported redundantly
[INFO] [stdout]    --> src/response_options.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 196 |     use super::*;
[INFO] [stdout]     |         -------- the item `Token` is already imported here
[INFO] [stdout] 197 |     use crate::token::Token;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/server_response.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 | use crate::{ffi, from_c_bool, properties::Properties, reason_code::ReasonCode};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/properties.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     convert::TryFrom,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]   --> src/message.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 | use std::{borrow::Cow, convert::From, ffi::CString, fmt, os::raw::c_void, pin::Pin, slice};
[INFO] [stdout]    |                        ^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/token.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         ffi,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/client_persistence.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 | use crate::{errors::Result, ffi, to_c_bool};
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crate::{ffi, message::Message, reason_code::ReasonCode};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/c_trace.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use crate::ffi;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.87s
[INFO] running `Command { std: "docker" "inspect" "127cc0c21851283c3ad1d73ec92dae78d348acd735cae5ab7d640775a5babd96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "127cc0c21851283c3ad1d73ec92dae78d348acd735cae5ab7d640775a5babd96", kill_on_drop: false }`
[INFO] [stdout] 127cc0c21851283c3ad1d73ec92dae78d348acd735cae5ab7d640775a5babd96
[INFO] checking paho-mqtt-0.12.3 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate paho-mqtt 0.12.3 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate paho-mqtt 0.12.3 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 paho-mqtt 0.12.3
[INFO] finished tweaking crates.io crate paho-mqtt 0.12.3
[INFO] tweaked toml for crates.io crate paho-mqtt 0.12.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate paho-mqtt 0.12.3 already has a lockfile, it will not be regenerated
[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] 7e67e0ba10ac371afe49b0ac026413d7d29b7240ab9dac42725bc6b8bf3516cd
[INFO] running `Command { std: "docker" "start" "-a" "7e67e0ba10ac371afe49b0ac026413d7d29b7240ab9dac42725bc6b8bf3516cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e67e0ba10ac371afe49b0ac026413d7d29b7240ab9dac42725bc6b8bf3516cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e67e0ba10ac371afe49b0ac026413d7d29b7240ab9dac42725bc6b8bf3516cd", kill_on_drop: false }`
[INFO] [stdout] 7e67e0ba10ac371afe49b0ac026413d7d29b7240ab9dac42725bc6b8bf3516cd
[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] 10d44ff37cc55b1ad8c6729ba50eb7470777d7cbcfdc70dbf1288f089bff5fc7
[INFO] running `Command { std: "docker" "start" "-a" "10d44ff37cc55b1ad8c6729ba50eb7470777d7cbcfdc70dbf1288f089bff5fc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking value-bag v1.4.2
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling rustix v0.37.26
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]     Checking async-task v4.5.0
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]     Checking termcolor v1.3.0
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking futures-lite v1.13.0
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking concurrent-queue v2.3.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking async-channel v1.9.0
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking async-executor v1.6.0
[INFO] [stderr]     Checking blocking v1.4.1
[INFO] [stderr]    Compiling cmake v0.1.50
[INFO] [stderr]     Checking io-lifetimes v1.0.11
[INFO] [stderr]     Checking socket2 v0.4.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling openssl-sys v0.9.93
[INFO] [stderr]    Compiling paho-mqtt-sys v0.9.0
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking ctrlc v3.4.1
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking async-global-executor v2.3.1
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling thiserror-impl v1.0.50
[INFO] [stderr]    Compiling serde_derive v1.0.189
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking paho-mqtt v0.12.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/async_client.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/create_options.rs:30:71
[INFO] [stdout]    |
[INFO] [stdout] 30 |     async_client::AsyncClient, client_persistence::ClientPersistence, ffi, to_c_bool, Result,
[INFO] [stdout]    |                                                                       ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/connect_options.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     ffi, from_c_bool,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/will_options.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/ssl_options.rs:31:29
[INFO] [stdout]    |
[INFO] [stdout] 31 | use crate::{errors::Result, ffi, from_c_bool, to_c_bool};
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/disconnect_options.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/subscribe_options.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 | use crate::{ffi, from_c_bool, to_c_bool, Error, Result};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/subscribe_options.rs:28:11
[INFO] [stdout]    |
[INFO] [stdout] 28 | use std::{convert::TryFrom, fmt};
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/response_options.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/server_response.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 | use crate::{ffi, from_c_bool, properties::Properties, reason_code::ReasonCode};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/properties.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     convert::TryFrom,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/properties.rs:35:29
[INFO] [stdout]    |
[INFO] [stdout] 35 | use crate::{errors::Result, ffi};
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]   --> src/message.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 | use std::{borrow::Cow, convert::From, ffi::CString, fmt, os::raw::c_void, pin::Pin, slice};
[INFO] [stdout]    |                        ^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/message.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crate::{ffi, properties::Properties, to_c_bool};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/token.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         ffi,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/client_persistence.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 | use crate::{errors::Result, ffi, to_c_bool};
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crate::{ffi, message::Message, reason_code::ReasonCode};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/c_trace.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use crate::ffi;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/async_client.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Arc` is imported redundantly
[INFO] [stdout]     --> src/async_client.rs:1230:21
[INFO] [stdout]      |
[INFO] [stdout] 1228 |     use super::*;
[INFO] [stdout]      |         -------- the item `Arc` is already imported here
[INFO] [stdout] 1229 |     use crate::create_options::CreateOptionsBuilder;
[INFO] [stdout] 1230 |     use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]      |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Mutex` is imported redundantly
[INFO] [stdout]     --> src/async_client.rs:1230:26
[INFO] [stdout]      |
[INFO] [stdout] 1228 |     use super::*;
[INFO] [stdout]      |         -------- the item `Mutex` is already imported here
[INFO] [stdout] 1229 |     use crate::create_options::CreateOptionsBuilder;
[INFO] [stdout] 1230 |     use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]      |                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/subscribe_options.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 | use crate::{ffi, from_c_bool, to_c_bool, Error, Result};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/subscribe_options.rs:28:11
[INFO] [stdout]    |
[INFO] [stdout] 28 | use std::{convert::TryFrom, fmt};
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/response_options.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     ffi,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Token` is imported redundantly
[INFO] [stdout]    --> src/response_options.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 196 |     use super::*;
[INFO] [stdout]     |         -------- the item `Token` is already imported here
[INFO] [stdout] 197 |     use crate::token::Token;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/server_response.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 | use crate::{ffi, from_c_bool, properties::Properties, reason_code::ReasonCode};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/properties.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     convert::TryFrom,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]   --> src/message.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 | use std::{borrow::Cow, convert::From, ffi::CString, fmt, os::raw::c_void, pin::Pin, slice};
[INFO] [stdout]    |                        ^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/token.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         ffi,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/client_persistence.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 | use crate::{errors::Result, ffi, to_c_bool};
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crate::{ffi, message::Message, reason_code::ReasonCode};
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ffi` is imported redundantly
[INFO] [stdout]   --> src/c_trace.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use crate::ffi;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:83:1
[INFO] [stdout]    |
[INFO] [stdout] 83 | extern crate paho_mqtt_sys as ffi;
[INFO] [stdout]    | ---------------------------------- the item `ffi` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.70s
[INFO] running `Command { std: "docker" "inspect" "10d44ff37cc55b1ad8c6729ba50eb7470777d7cbcfdc70dbf1288f089bff5fc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10d44ff37cc55b1ad8c6729ba50eb7470777d7cbcfdc70dbf1288f089bff5fc7", kill_on_drop: false }`
[INFO] [stdout] 10d44ff37cc55b1ad8c6729ba50eb7470777d7cbcfdc70dbf1288f089bff5fc7