[INFO] crate i3ipc 0.10.1 is already in cache
[INFO] checking i3ipc-0.10.1 against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] extracting crate i3ipc 0.10.1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate i3ipc 0.10.1 on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate i3ipc 0.10.1
[INFO] finished tweaking crates.io crate i3ipc 0.10.1
[INFO] tweaked toml for crates.io crate i3ipc 0.10.1 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=forbid" "-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" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a80ee10efc5be3123aa803ea8b2c3d841d917e018a22ce48bbcbc497c79c2297
[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" "a80ee10efc5be3123aa803ea8b2c3d841d917e018a22ce48bbcbc497c79c2297"`
[INFO] [stderr]     Checking i3ipc v0.10.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/event.rs:41:32
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let val: json::Value = try!(json::from_str(s));
[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/event.rs:82:32
[INFO] [stderr]    |
[INFO] [stderr] 82 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]    |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/event.rs:106:32
[INFO] [stderr]     |
[INFO] [stderr] 106 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/event.rs:127:32
[INFO] [stderr]     |
[INFO] [stderr] 127 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/event.rs:162:32
[INFO] [stderr]     |
[INFO] [stderr] 162 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/event.rs:183:32
[INFO] [stderr]     |
[INFO] [stderr] 183 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:117:18
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let output = try!(process::Command::new("i3").arg("--get-socketpath").output());
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:148:9
[INFO] [stderr]     |
[INFO] [stderr] 148 |         try!(bytes.write_u32::<LittleEndian>(payload.len() as u32)); // 4 bytes
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:149:9
[INFO] [stderr]     |
[INFO] [stderr] 149 |         try!(bytes.write_u32::<LittleEndian>(message_type)); // 4 bytes
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 |         try!(self.read_exact(&mut magic_data));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:166:27
[INFO] [stderr]     |
[INFO] [stderr] 166 |         let payload_len = try!(self.read_u32::<LittleEndian>());
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:167:28
[INFO] [stderr]     |
[INFO] [stderr] 167 |         let message_type = try!(self.read_u32::<LittleEndian>());
[INFO] [stderr]     |                            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:169:9
[INFO] [stderr]     |
[INFO] [stderr] 169 |         try!(self.read_exact(&mut payload_data[..]));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:216:50
[INFO] [stderr]     |
[INFO] [stderr] 216 |                     event::Event::WorkspaceEvent(try!(event::WorkspaceEventInfo::from_str(payload)))
[INFO] [stderr]     |                                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:218:48
[INFO] [stderr]     |
[INFO] [stderr] 218 |                 1 => event::Event::OutputEvent(try!(event::OutputEventInfo::from_str(payload))),
[INFO] [stderr]     |                                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:219:46
[INFO] [stderr]     |
[INFO] [stderr] 219 |                 2 => event::Event::ModeEvent(try!(event::ModeEventInfo::from_str(payload))),
[INFO] [stderr]     |                                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:220:48
[INFO] [stderr]     |
[INFO] [stderr] 220 |                 3 => event::Event::WindowEvent(try!(event::WindowEventInfo::from_str(payload))),
[INFO] [stderr]     |                                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:222:50
[INFO] [stderr]     |
[INFO] [stderr] 222 |                     event::Event::BarConfigEvent(try!(event::BarConfigEventInfo::from_str(payload)))
[INFO] [stderr]     |                                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:224:49
[INFO] [stderr]     |
[INFO] [stderr] 224 |                 5 => event::Event::BindingEvent(try!(event::BindingEventInfo::from_str(payload))),
[INFO] [stderr]     |                                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:298:30
[INFO] [stderr]     |
[INFO] [stderr] 298 |         let j: json::Value = try!(self.stream.send_receive_i3_message(2, &json));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:339:30
[INFO] [stderr]     |
[INFO] [stderr] 339 |         let j: json::Value = try!(self.stream.send_receive_i3_message(0, string));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:357:30
[INFO] [stderr]     |
[INFO] [stderr] 357 |         let j: json::Value = try!(self.stream.send_receive_i3_message(1, ""));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:376:30
[INFO] [stderr]     |
[INFO] [stderr] 376 |         let j: json::Value = try!(self.stream.send_receive_i3_message(3, ""));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:397:32
[INFO] [stderr]     |
[INFO] [stderr] 397 |         let val: json::Value = try!(self.stream.send_receive_i3_message(4, ""));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:403:34
[INFO] [stderr]     |
[INFO] [stderr] 403 |         let marks: Vec<String> = try!(self.stream.send_receive_i3_message(5, ""));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:409:32
[INFO] [stderr]     |
[INFO] [stderr] 409 |         let ids: Vec<String> = try!(self.stream.send_receive_i3_message(6, ""));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:415:32
[INFO] [stderr]     |
[INFO] [stderr] 415 |         let ids: json::Value = try!(self.stream.send_receive_i3_message(6, id));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:422:30
[INFO] [stderr]     |
[INFO] [stderr] 422 |         let j: json::Value = try!(self.stream.send_receive_i3_message(7, ""));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:58:32
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:94:32
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:69:30
[INFO] [stderr]    |
[INFO] [stderr] 69 |         write!(f, "{}", self.description())
[INFO] [stderr]    |                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/lib.rs:104:30
[INFO] [stderr]     |
[INFO] [stderr] 104 |         write!(f, "{}", self.description())
[INFO] [stderr]     |                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/lib.rs:120:14
[INFO] [stderr]     |
[INFO] [stderr] 120 |             .trim_right_matches('\n')
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end_matches`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/event.rs:41:32
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let val: json::Value = try!(json::from_str(s));
[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/event.rs:82:32
[INFO] [stderr]    |
[INFO] [stderr] 82 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]    |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/event.rs:106:32
[INFO] [stderr]     |
[INFO] [stderr] 106 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/event.rs:127:32
[INFO] [stderr]     |
[INFO] [stderr] 127 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/event.rs:162:32
[INFO] [stderr]     |
[INFO] [stderr] 162 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/event.rs:183:32
[INFO] [stderr]     |
[INFO] [stderr] 183 |         let val: json::Value = try!(json::from_str(s));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:117:18
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let output = try!(process::Command::new("i3").arg("--get-socketpath").output());
[INFO] [stderr]     |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:148:9
[INFO] [stderr]     |
[INFO] [stderr] 148 |         try!(bytes.write_u32::<LittleEndian>(payload.len() as u32)); // 4 bytes
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:149:9
[INFO] [stderr]     |
[INFO] [stderr] 149 |         try!(bytes.write_u32::<LittleEndian>(message_type)); // 4 bytes
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 |         try!(self.read_exact(&mut magic_data));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:166:27
[INFO] [stderr]     |
[INFO] [stderr] 166 |         let payload_len = try!(self.read_u32::<LittleEndian>());
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:167:28
[INFO] [stderr]     |
[INFO] [stderr] 167 |         let message_type = try!(self.read_u32::<LittleEndian>());
[INFO] [stderr]     |                            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:169:9
[INFO] [stderr]     |
[INFO] [stderr] 169 |         try!(self.read_exact(&mut payload_data[..]));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:216:50
[INFO] [stderr]     |
[INFO] [stderr] 216 |                     event::Event::WorkspaceEvent(try!(event::WorkspaceEventInfo::from_str(payload)))
[INFO] [stderr]     |                                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:218:48
[INFO] [stderr]     |
[INFO] [stderr] 218 |                 1 => event::Event::OutputEvent(try!(event::OutputEventInfo::from_str(payload))),
[INFO] [stderr]     |                                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:219:46
[INFO] [stderr]     |
[INFO] [stderr] 219 |                 2 => event::Event::ModeEvent(try!(event::ModeEventInfo::from_str(payload))),
[INFO] [stderr]     |                                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:220:48
[INFO] [stderr]     |
[INFO] [stderr] 220 |                 3 => event::Event::WindowEvent(try!(event::WindowEventInfo::from_str(payload))),
[INFO] [stderr]     |                                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:222:50
[INFO] [stderr]     |
[INFO] [stderr] 222 |                     event::Event::BarConfigEvent(try!(event::BarConfigEventInfo::from_str(payload)))
[INFO] [stderr]     |                                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:224:49
[INFO] [stderr]     |
[INFO] [stderr] 224 |                 5 => event::Event::BindingEvent(try!(event::BindingEventInfo::from_str(payload))),
[INFO] [stderr]     |                                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:298:30
[INFO] [stderr]     |
[INFO] [stderr] 298 |         let j: json::Value = try!(self.stream.send_receive_i3_message(2, &json));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:339:30
[INFO] [stderr]     |
[INFO] [stderr] 339 |         let j: json::Value = try!(self.stream.send_receive_i3_message(0, string));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:357:30
[INFO] [stderr]     |
[INFO] [stderr] 357 |         let j: json::Value = try!(self.stream.send_receive_i3_message(1, ""));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:376:30
[INFO] [stderr]     |
[INFO] [stderr] 376 |         let j: json::Value = try!(self.stream.send_receive_i3_message(3, ""));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:397:32
[INFO] [stderr]     |
[INFO] [stderr] 397 |         let val: json::Value = try!(self.stream.send_receive_i3_message(4, ""));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:403:34
[INFO] [stderr]     |
[INFO] [stderr] 403 |         let marks: Vec<String> = try!(self.stream.send_receive_i3_message(5, ""));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:409:32
[INFO] [stderr]     |
[INFO] [stderr] 409 |         let ids: Vec<String> = try!(self.stream.send_receive_i3_message(6, ""));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:415:32
[INFO] [stderr]     |
[INFO] [stderr] 415 |         let ids: json::Value = try!(self.stream.send_receive_i3_message(6, id));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:422:30
[INFO] [stderr]     |
[INFO] [stderr] 422 |         let j: json::Value = try!(self.stream.send_receive_i3_message(7, ""));
[INFO] [stderr]     |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:58:32
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:94:32
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:69:30
[INFO] [stderr]    |
[INFO] [stderr] 69 |         write!(f, "{}", self.description())
[INFO] [stderr]    |                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/lib.rs:104:30
[INFO] [stderr]     |
[INFO] [stderr] 104 |         write!(f, "{}", self.description())
[INFO] [stderr]     |                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/lib.rs:120:14
[INFO] [stderr]     |
[INFO] [stderr] 120 |             .trim_right_matches('\n')
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end_matches`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.00s
[INFO] running `"docker" "inspect" "a80ee10efc5be3123aa803ea8b2c3d841d917e018a22ce48bbcbc497c79c2297"`
[INFO] running `"docker" "rm" "-f" "a80ee10efc5be3123aa803ea8b2c3d841d917e018a22ce48bbcbc497c79c2297"`
[INFO] [stdout] a80ee10efc5be3123aa803ea8b2c3d841d917e018a22ce48bbcbc497c79c2297
