[INFO] fetching crate way-cooler-ipc 0.0.0...
[INFO] testing way-cooler-ipc-0.0.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate way-cooler-ipc 0.0.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate way-cooler-ipc 0.0.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate way-cooler-ipc 0.0.0
[INFO] finished tweaking crates.io crate way-cooler-ipc 0.0.0
[INFO] tweaked toml for crates.io crate way-cooler-ipc 0.0.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8ddaa5038318a6c1fdd79a6717fe3e363f180ef26fec5167ab5f18f77944a212
[INFO] running `"docker" "start" "-a" "8ddaa5038318a6c1fdd79a6717fe3e363f180ef26fec5167ab5f18f77944a212"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling unix_socket v0.5.0
[INFO] [stderr]    Compiling way-cooler-ipc v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         try!(self.stream.read_exact(&mut buffer).map_err(ReceiveError::IO));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:79:27
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let json_string = try!(encode(message).map_err(SendError::Encode));
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         try!(self.stream.write_all(&len_bytes).map_err(SendError::IO));
[INFO] [stderr]    |         ^^^
[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: if this is intentional, prefix it with an underscore: `_command`
[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:14:10
[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:22:10
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub enum ReceiveError {
[INFO] [stderr]    |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `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:37:4
[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:43:4
[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: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "8ddaa5038318a6c1fdd79a6717fe3e363f180ef26fec5167ab5f18f77944a212"`
[INFO] running `"docker" "rm" "-f" "8ddaa5038318a6c1fdd79a6717fe3e363f180ef26fec5167ab5f18f77944a212"`
[INFO] [stdout] 8ddaa5038318a6c1fdd79a6717fe3e363f180ef26fec5167ab5f18f77944a212
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 38a3033ac075da470b9cd4d6305dc6137f66531fd7ebc5d61a19bdc60bfb3e29
[INFO] running `"docker" "start" "-a" "38a3033ac075da470b9cd4d6305dc6137f66531fd7ebc5d61a19bdc60bfb3e29"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling way-cooler-ipc v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         try!(self.stream.read_exact(&mut buffer).map_err(ReceiveError::IO));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:79:27
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let json_string = try!(encode(message).map_err(SendError::Encode));
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         try!(self.stream.write_all(&len_bytes).map_err(SendError::IO));
[INFO] [stderr]    |         ^^^
[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: if this is intentional, prefix it with an underscore: `_command`
[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:14:10
[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:22:10
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub enum ReceiveError {
[INFO] [stderr]    |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `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:37:4
[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:43:4
[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: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         try!(self.stream.read_exact(&mut buffer).map_err(ReceiveError::IO));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:79:27
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let json_string = try!(encode(message).map_err(SendError::Encode));
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         try!(self.stream.write_all(&len_bytes).map_err(SendError::IO));
[INFO] [stderr]    |         ^^^
[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: if this is intentional, prefix it with an underscore: `_command`
[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:14:10
[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:22:10
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub enum ReceiveError {
[INFO] [stderr]    |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `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:37:4
[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:43:4
[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: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "38a3033ac075da470b9cd4d6305dc6137f66531fd7ebc5d61a19bdc60bfb3e29"`
[INFO] running `"docker" "rm" "-f" "38a3033ac075da470b9cd4d6305dc6137f66531fd7ebc5d61a19bdc60bfb3e29"`
[INFO] [stdout] 38a3033ac075da470b9cd4d6305dc6137f66531fd7ebc5d61a19bdc60bfb3e29
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stdout] ac42fe8633d8bc5afd7284b35d3ff025f9602fa2e0462b1c8c1af16a7e615871
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "ac42fe8633d8bc5afd7284b35d3ff025f9602fa2e0462b1c8c1af16a7e615871"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         try!(self.stream.read_exact(&mut buffer).map_err(ReceiveError::IO));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:79:27
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let json_string = try!(encode(message).map_err(SendError::Encode));
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         try!(self.stream.write_all(&len_bytes).map_err(SendError::IO));
[INFO] [stderr]    |         ^^^
[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: if this is intentional, prefix it with an underscore: `_command`
[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:14:10
[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:22:10
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub enum ReceiveError {
[INFO] [stderr]    |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `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:37:4
[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:43:4
[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: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         try!(self.stream.read_exact(&mut buffer).map_err(ReceiveError::IO));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:79:27
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let json_string = try!(encode(message).map_err(SendError::Encode));
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/client.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         try!(self.stream.write_all(&len_bytes).map_err(SendError::IO));
[INFO] [stderr]    |         ^^^
[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: if this is intentional, prefix it with an underscore: `_command`
[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:14:10
[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:22:10
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub enum ReceiveError {
[INFO] [stderr]    |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `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:37:4
[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:43:4
[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: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/way_cooler_ipc-b3fd289969b6c868
[INFO] [stderr]    Doc-tests way-cooler-ipc
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ac42fe8633d8bc5afd7284b35d3ff025f9602fa2e0462b1c8c1af16a7e615871"`
[INFO] running `"docker" "rm" "-f" "ac42fe8633d8bc5afd7284b35d3ff025f9602fa2e0462b1c8c1af16a7e615871"`
[INFO] [stdout] ac42fe8633d8bc5afd7284b35d3ff025f9602fa2e0462b1c8c1af16a7e615871