[INFO] crate way-cooler-ipc 0.0.0 is already in cache
[INFO] extracting crate way-cooler-ipc 0.0.0 into work/ex/clippy-test-run/sources/stable/reg/way-cooler-ipc/0.0.0
[INFO] extracting crate way-cooler-ipc 0.0.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/way-cooler-ipc/0.0.0
[INFO] validating manifest of way-cooler-ipc-0.0.0 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of way-cooler-ipc-0.0.0 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing way-cooler-ipc-0.0.0
[INFO] finished frobbing way-cooler-ipc-0.0.0
[INFO] frobbed toml for way-cooler-ipc-0.0.0 written to work/ex/clippy-test-run/sources/stable/reg/way-cooler-ipc/0.0.0/Cargo.toml
[INFO] started frobbing way-cooler-ipc-0.0.0
[INFO] finished frobbing way-cooler-ipc-0.0.0
[INFO] frobbed toml for way-cooler-ipc-0.0.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/way-cooler-ipc/0.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting way-cooler-ipc-0.0.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/way-cooler-ipc/0.0.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 50d3660119d5c33e4f618c1141b7ab9a87798c049ff292c6bf1d7cc5cee457d4
[INFO] running `"docker" "start" "-a" "50d3660119d5c33e4f618c1141b7ab9a87798c049ff292c6bf1d7cc5cee457d4"`
[INFO] [stderr]     Checking unix_socket v0.5.0
[INFO] [stderr]     Checking way-cooler-ipc v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/client.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |         return Json::from_reader(&mut stream_json).map_err(ReceiveError::Parse);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Json::from_reader(&mut stream_json).map_err(ReceiveError::Parse)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ToJson`
[INFO] [stderr]  --> src/message.rs:5:35
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustc_serialize::json::{Json, ToJson};
[INFO] [stderr]   |                                   ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Read`, `Write`
[INFO] [stderr]  --> src/command.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{Read, Write};
[INFO] [stderr]   |               ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Error as IOError`
[INFO] [stderr]  --> src/command.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::Error as IOError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/client.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |         return Json::from_reader(&mut stream_json).map_err(ReceiveError::Parse);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Json::from_reader(&mut stream_json).map_err(ReceiveError::Parse)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ToJson`
[INFO] [stderr]  --> src/message.rs:5:35
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustc_serialize::json::{Json, ToJson};
[INFO] [stderr]   |                                   ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Read`, `Write`
[INFO] [stderr]  --> src/command.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{Read, Write};
[INFO] [stderr]   |               ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Error as IOError`
[INFO] [stderr]  --> src/command.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::Error as IOError;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `command`
[INFO] [stderr]   --> src/command.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn send(command: Command) -> CommandResult {
[INFO] [stderr]    |                 ^^^^^^^ help: consider using `_command` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `SendError`
[INFO] [stderr]   --> src/client.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub enum SendError {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ReceiveError`
[INFO] [stderr]   --> src/client.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub enum ReceiveError {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `stream`
[INFO] [stderr]   --> src/client.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     stream: UnixStream,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u32_to_bytes`
[INFO] [stderr]   --> src/client.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn u32_to_bytes(input: u32) -> [u8; 4] {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u32_from_bytes`
[INFO] [stderr]   --> src/client.rs:43:1
[INFO] [stderr]    |
[INFO] [stderr] 43 | fn u32_from_bytes(bytes: [u8; 4]) -> u32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stream`
[INFO] [stderr]   --> src/client.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn stream(&self) -> &UnixStream {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stream_mut`
[INFO] [stderr]   --> src/client.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn stream_mut(&mut self) -> &mut UnixStream {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_stream`
[INFO] [stderr]   --> src/client.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn into_stream(self) -> UnixStream {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_message`
[INFO] [stderr]   --> src/client.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn read_message(&mut self) -> Result<Json, ReceiveError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `send_message`
[INFO] [stderr]   --> src/client.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn send_message(&mut self, message: &Json) -> Result<(), SendError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/client.rs:73:55
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let mut stream_json = (&mut self.stream).take(len as u64);
[INFO] [stderr]    |                                                       ^^^^^^^^^^ help: try: `u64::from(len)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: redundant closure found
[INFO] [stderr]   --> src/command.rs:18:41
[INFO] [stderr]    |
[INFO] [stderr] 18 |         SocketClient::connect(path).map(|s| CommandClient(s))
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^ help: remove closure as shown: `CommandClient`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_closure)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `command`
[INFO] [stderr]   --> src/command.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn send(command: Command) -> CommandResult {
[INFO] [stderr]    |                 ^^^^^^^ help: consider using `_command` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `SendError`
[INFO] [stderr]   --> src/client.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub enum SendError {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ReceiveError`
[INFO] [stderr]   --> src/client.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub enum ReceiveError {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `stream`
[INFO] [stderr]   --> src/client.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     stream: UnixStream,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u32_to_bytes`
[INFO] [stderr]   --> src/client.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn u32_to_bytes(input: u32) -> [u8; 4] {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u32_from_bytes`
[INFO] [stderr]   --> src/client.rs:43:1
[INFO] [stderr]    |
[INFO] [stderr] 43 | fn u32_from_bytes(bytes: [u8; 4]) -> u32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stream`
[INFO] [stderr]   --> src/client.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn stream(&self) -> &UnixStream {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `stream_mut`
[INFO] [stderr]   --> src/client.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn stream_mut(&mut self) -> &mut UnixStream {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_stream`
[INFO] [stderr]   --> src/client.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn into_stream(self) -> UnixStream {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_message`
[INFO] [stderr]   --> src/client.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn read_message(&mut self) -> Result<Json, ReceiveError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `send_message`
[INFO] [stderr]   --> src/client.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn send_message(&mut self, message: &Json) -> Result<(), SendError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/client.rs:73:55
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let mut stream_json = (&mut self.stream).take(len as u64);
[INFO] [stderr]    |                                                       ^^^^^^^^^^ help: try: `u64::from(len)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: redundant closure found
[INFO] [stderr]   --> src/command.rs:18:41
[INFO] [stderr]    |
[INFO] [stderr] 18 |         SocketClient::connect(path).map(|s| CommandClient(s))
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^ help: remove closure as shown: `CommandClient`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_closure)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.74s
[INFO] running `"docker" "inspect" "50d3660119d5c33e4f618c1141b7ab9a87798c049ff292c6bf1d7cc5cee457d4"`
[INFO] running `"docker" "rm" "-f" "50d3660119d5c33e4f618c1141b7ab9a87798c049ff292c6bf1d7cc5cee457d4"`
[INFO] [stdout] 50d3660119d5c33e4f618c1141b7ab9a87798c049ff292c6bf1d7cc5cee457d4