[INFO] fetching crate redshift 1.0.3...
[INFO] checking redshift-1.0.3 against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] extracting crate redshift 1.0.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate redshift 1.0.3 on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate redshift 1.0.3
[INFO] finished tweaking crates.io crate redshift 1.0.3
[INFO] tweaked toml for crates.io crate redshift 1.0.3 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byteorder v0.5.3
[INFO] [stderr]   Downloaded rustc-serialize v0.3.24
[INFO] [stderr]   Downloaded csv v0.14.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cc60fd28c35ef0fd6e97452eaa74b75ae345dcd8da19c6f44fd68a6fe3f03a04
[INFO] running `Command { std: "docker" "start" "-a" "cc60fd28c35ef0fd6e97452eaa74b75ae345dcd8da19c6f44fd68a6fe3f03a04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc60fd28c35ef0fd6e97452eaa74b75ae345dcd8da19c6f44fd68a6fe3f03a04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc60fd28c35ef0fd6e97452eaa74b75ae345dcd8da19c6f44fd68a6fe3f03a04", kill_on_drop: false }`
[INFO] [stdout] cc60fd28c35ef0fd6e97452eaa74b75ae345dcd8da19c6f44fd68a6fe3f03a04
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8843125905b25a9c3a780504a7d69e240432d9431b0b2f9db2b365a5e21a15c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c8843125905b25a9c3a780504a7d69e240432d9431b0b2f9db2b365a5e21a15c", kill_on_drop: false }`
[INFO] [stderr]     Checking csv v0.14.7
[INFO] [stderr]     Checking redshift v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/reader.rs:83:19
[INFO] [stdout]    |
[INFO] [stdout] 83 |             match try!(self.get_next_item()) {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader.rs:80:71
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub fn get_next_row(&mut self) -> Result<Option<RedshiftRow>, Box<Error>> {
[INFO] [stdout]    |                                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/reader.rs:116:30
[INFO] [stdout]     |
[INFO] [stdout] 116 |             if let Some(c) = try!(self.get_next_char(true)) {
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/reader.rs:129:45
[INFO] [stdout]     |
[INFO] [stdout] 129 | ...                   let next_next = try!(self.get_next_char(false));
[INFO] [stdout]     |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reader.rs:102:63
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn get_next_item(&mut self) -> Result<NextItemResult, Box<Error>> {
[INFO] [stdout]     |                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/reader.rs:189:27
[INFO] [stdout]     |
[INFO] [stdout] 189 |             self.length = try!(self.reader.read(&mut self.buffer));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reader.rs:187:72
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn get_next_char(&mut self, eat: bool) -> Result<Option<char>, Box<Error>> {
[INFO] [stdout]     |                                                                        ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/writer.rs:40:29
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub extract_column: Box<(Fn (&T) -> String)>,
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/writer.rs:40:30
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub extract_column: Box<(Fn (&T) -> String)>,
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (&T) -> String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |                 try!(writer.write(escaped.as_bytes()));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:134:21
[INFO] [stdout]     |
[INFO] [stdout] 134 |                     try!(writer.write(b"|"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:137:13
[INFO] [stdout]     |
[INFO] [stdout] 137 |             try!(writer.write(b"\n"));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 try!(writer.write(escaped.as_bytes()));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |                     try!(writer.write(b"|"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |             try!(writer.write(b"\n"));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:152:13
[INFO] [stdout]     |
[INFO] [stdout] 152 |             try!(writer.flush());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/writer.rs:126:140
[INFO] [stdout]     |
[INFO] [stdout] 126 | ...nDefinition<T>>, items: Vec<T>) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/reader.rs:83:19
[INFO] [stdout]    |
[INFO] [stdout] 83 |             match try!(self.get_next_item()) {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reader.rs:80:71
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pub fn get_next_row(&mut self) -> Result<Option<RedshiftRow>, Box<Error>> {
[INFO] [stdout]    |                                                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/reader.rs:116:30
[INFO] [stdout]     |
[INFO] [stdout] 116 |             if let Some(c) = try!(self.get_next_char(true)) {
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/reader.rs:129:45
[INFO] [stdout]     |
[INFO] [stdout] 129 | ...                   let next_next = try!(self.get_next_char(false));
[INFO] [stdout]     |                                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reader.rs:102:63
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn get_next_item(&mut self) -> Result<NextItemResult, Box<Error>> {
[INFO] [stdout]     |                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/reader.rs:189:27
[INFO] [stdout]     |
[INFO] [stdout] 189 |             self.length = try!(self.reader.read(&mut self.buffer));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/reader.rs:187:72
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn get_next_char(&mut self, eat: bool) -> Result<Option<char>, Box<Error>> {
[INFO] [stdout]     |                                                                        ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/writer.rs:40:29
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub extract_column: Box<(Fn (&T) -> String)>,
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/writer.rs:40:30
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub extract_column: Box<(Fn (&T) -> String)>,
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (&T) -> String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |                 try!(writer.write(escaped.as_bytes()));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:134:21
[INFO] [stdout]     |
[INFO] [stdout] 134 |                     try!(writer.write(b"|"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:137:13
[INFO] [stdout]     |
[INFO] [stdout] 137 |             try!(writer.write(b"\n"));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 try!(writer.write(escaped.as_bytes()));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |                     try!(writer.write(b"|"));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |             try!(writer.write(b"\n"));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/writer.rs:152:13
[INFO] [stdout]     |
[INFO] [stdout] 152 |             try!(writer.flush());
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/writer.rs:126:140
[INFO] [stdout]     |
[INFO] [stdout] 126 | ...nDefinition<T>>, items: Vec<T>) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/reader.rs:55:45
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Err(e) => panic!(String::from(e.description())),
[INFO] [stdout]    |                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/reader.rs:55:45
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Err(e) => panic!(String::from(e.description())),
[INFO] [stdout]    |                                             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/reader.rs:55:30
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Err(e) => panic!(String::from(e.description())),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Err(e) => panic!("{}", String::from(e.description())),
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Err(e) => std::panic::panic_any(String::from(e.description())),
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/reader.rs:55:30
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Err(e) => panic!(String::from(e.description())),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Err(e) => panic!("{}", String::from(e.description())),
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 55 |             Err(e) => std::panic::panic_any(String::from(e.description())),
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/reader.rs:131:33
[INFO] [stdout]     |
[INFO] [stdout] 131 | ...                   self.get_next_char(true);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/reader.rs:131:33
[INFO] [stdout]     |
[INFO] [stdout] 131 | ...                   self.get_next_char(true);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/writer_tests.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let mut writer = redshift::writer::Writer::new();
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `A` should have a snake case name
[INFO] [stdout]  --> tests/writer_tests.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         pub A: &'a str,
[INFO] [stdout]   |             ^ help: convert the identifier to snake case: `a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `B` should have a snake case name
[INFO] [stdout]   --> tests/writer_tests.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         pub B: &'a str,
[INFO] [stdout]    |             ^ help: convert the identifier to snake case: `b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `C` should have a snake case name
[INFO] [stdout]   --> tests/writer_tests.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         pub C: &'a str,
[INFO] [stdout]    |             ^ help: convert the identifier to snake case (notice the capitalization): `c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "c8843125905b25a9c3a780504a7d69e240432d9431b0b2f9db2b365a5e21a15c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8843125905b25a9c3a780504a7d69e240432d9431b0b2f9db2b365a5e21a15c", kill_on_drop: false }`
[INFO] [stdout] c8843125905b25a9c3a780504a7d69e240432d9431b0b2f9db2b365a5e21a15c