[INFO] crate iptables 0.2.2 is already in cache
[INFO] extracting crate iptables 0.2.2 into work/ex/clippy-test-run/sources/stable/reg/iptables/0.2.2
[INFO] extracting crate iptables 0.2.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/iptables/0.2.2
[INFO] validating manifest of iptables-0.2.2 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 iptables-0.2.2 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 iptables-0.2.2
[INFO] finished frobbing iptables-0.2.2
[INFO] frobbed toml for iptables-0.2.2 written to work/ex/clippy-test-run/sources/stable/reg/iptables/0.2.2/Cargo.toml
[INFO] started frobbing iptables-0.2.2
[INFO] finished frobbing iptables-0.2.2
[INFO] frobbed toml for iptables-0.2.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/iptables/0.2.2/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 iptables-0.2.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/iptables/0.2.2:/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] 4aefeb35f749b04f40c1ee4fe8f5053a4f71d2dcb7263cb649c6c235a98ebb64
[INFO] running `"docker" "start" "-a" "4aefeb35f749b04f40c1ee4fe8f5053a4f71d2dcb7263cb649c6c235a98ebb64"`
[INFO] [stderr]     Checking iptables v0.2.2 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |         cmd: cmd,
[INFO] [stderr]     |         ^^^^^^^^ help: replace it with: `cmd`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |         cmd: cmd,
[INFO] [stderr]     |         ^^^^^^^^ help: replace it with: `cmd`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:38:31
[INFO] [stderr]    |
[INFO] [stderr] 38 | const BUILTIN_CHAINS_FILTER: &'static [&'static str] = &["INPUT", "FORWARD", "OUTPUT"];
[INFO] [stderr]    |                              -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:38:41
[INFO] [stderr]    |
[INFO] [stderr] 38 | const BUILTIN_CHAINS_FILTER: &'static [&'static str] = &["INPUT", "FORWARD", "OUTPUT"];
[INFO] [stderr]    |                                        -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:39:31
[INFO] [stderr]    |
[INFO] [stderr] 39 | const BUILTIN_CHAINS_MANGLE: &'static [&'static str] =
[INFO] [stderr]    |                              -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:39:41
[INFO] [stderr]    |
[INFO] [stderr] 39 | const BUILTIN_CHAINS_MANGLE: &'static [&'static str] =
[INFO] [stderr]    |                                        -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:41:28
[INFO] [stderr]    |
[INFO] [stderr] 41 | const BUILTIN_CHAINS_NAT: &'static [&'static str] = &["PREROUTING", "POSTROUTING", "OUTPUT"];
[INFO] [stderr]    |                           -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:41:38
[INFO] [stderr]    |
[INFO] [stderr] 41 | const BUILTIN_CHAINS_NAT: &'static [&'static str] = &["PREROUTING", "POSTROUTING", "OUTPUT"];
[INFO] [stderr]    |                                     -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:42:28
[INFO] [stderr]    |
[INFO] [stderr] 42 | const BUILTIN_CHAINS_RAW: &'static [&'static str] = &["PREROUTING", "OUTPUT"];
[INFO] [stderr]    |                           -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:42:38
[INFO] [stderr]    |
[INFO] [stderr] 42 | const BUILTIN_CHAINS_RAW: &'static [&'static str] = &["PREROUTING", "OUTPUT"];
[INFO] [stderr]    |                                     -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:43:33
[INFO] [stderr]    |
[INFO] [stderr] 43 | const BUILTIN_CHAINS_SECURITY: &'static [&'static str] = &["INPUT", "OUTPUT", "FORWARD"];
[INFO] [stderr]    |                                -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:43:43
[INFO] [stderr]    |
[INFO] [stderr] 43 | const BUILTIN_CHAINS_SECURITY: &'static [&'static str] = &["INPUT", "OUTPUT", "FORWARD"];
[INFO] [stderr]    |                                          -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:38:31
[INFO] [stderr]    |
[INFO] [stderr] 38 | const BUILTIN_CHAINS_FILTER: &'static [&'static str] = &["INPUT", "FORWARD", "OUTPUT"];
[INFO] [stderr]    |                              -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:38:41
[INFO] [stderr]    |
[INFO] [stderr] 38 | const BUILTIN_CHAINS_FILTER: &'static [&'static str] = &["INPUT", "FORWARD", "OUTPUT"];
[INFO] [stderr]    |                                        -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:39:31
[INFO] [stderr]    |
[INFO] [stderr] 39 | const BUILTIN_CHAINS_MANGLE: &'static [&'static str] =
[INFO] [stderr]    |                              -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:39:41
[INFO] [stderr]    |
[INFO] [stderr] 39 | const BUILTIN_CHAINS_MANGLE: &'static [&'static str] =
[INFO] [stderr]    |                                        -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:41:28
[INFO] [stderr]    |
[INFO] [stderr] 41 | const BUILTIN_CHAINS_NAT: &'static [&'static str] = &["PREROUTING", "POSTROUTING", "OUTPUT"];
[INFO] [stderr]    |                           -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:41:38
[INFO] [stderr]    |
[INFO] [stderr] 41 | const BUILTIN_CHAINS_NAT: &'static [&'static str] = &["PREROUTING", "POSTROUTING", "OUTPUT"];
[INFO] [stderr]    |                                     -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:42:28
[INFO] [stderr]    |
[INFO] [stderr] 42 | const BUILTIN_CHAINS_RAW: &'static [&'static str] = &["PREROUTING", "OUTPUT"];
[INFO] [stderr]    |                           -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:42:38
[INFO] [stderr]    |
[INFO] [stderr] 42 | const BUILTIN_CHAINS_RAW: &'static [&'static str] = &["PREROUTING", "OUTPUT"];
[INFO] [stderr]    |                                     -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:43:33
[INFO] [stderr]    |
[INFO] [stderr] 43 | const BUILTIN_CHAINS_SECURITY: &'static [&'static str] = &["INPUT", "OUTPUT", "FORWARD"];
[INFO] [stderr]    |                                -^^^^^^^--------------- help: consider removing `'static`: `&[&'static str]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/lib.rs:43:43
[INFO] [stderr]    |
[INFO] [stderr] 43 | const BUILTIN_CHAINS_SECURITY: &'static [&'static str] = &["INPUT", "OUTPUT", "FORWARD"];
[INFO] [stderr]    |                                          -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:131:41
[INFO] [stderr]     |
[INFO] [stderr] 131 |         for item in output.trim().split("\n") {
[INFO] [stderr]     |                                         ^^^^ help: try using a char instead: `'\n'`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:132:37
[INFO] [stderr]     |
[INFO] [stderr] 132 |             let fields = item.split(" ").collect::<Vec<&str>>();
[INFO] [stderr]     |                                     ^^^ help: try using a char instead: `' '`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:131:41
[INFO] [stderr]     |
[INFO] [stderr] 131 |         for item in output.trim().split("\n") {
[INFO] [stderr]     |                                         ^^^^ help: try using a char instead: `'\n'`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:132:37
[INFO] [stderr]     |
[INFO] [stderr] 132 |             let fields = item.split(" ").collect::<Vec<&str>>();
[INFO] [stderr]     |                                     ^^^ help: try using a char instead: `' '`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:272:41
[INFO] [stderr]     |
[INFO] [stderr] 272 |         for item in output.trim().split("\n") {
[INFO] [stderr]     |                                         ^^^^ help: try using a char instead: `'\n'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:273:37
[INFO] [stderr]     |
[INFO] [stderr] 273 |             let fields = item.split(" ").collect::<Vec<&str>>();
[INFO] [stderr]     |                                     ^^^ help: try using a char instead: `' '`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:336:41
[INFO] [stderr]     |
[INFO] [stderr] 336 |         for item in output.trim().split("\n") {
[INFO] [stderr]     |                                         ^^^^ help: try using a char instead: `'\n'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/lib.rs:346:9
[INFO] [stderr]     |
[INFO] [stderr] 346 | /         let output;
[INFO] [stderr] 347 | |
[INFO] [stderr] 348 | |         if self.has_wait {
[INFO] [stderr] 349 | |             output = output_cmd.args(args).arg("--wait").output()?;
[INFO] [stderr] ...   |
[INFO] [stderr] 365 | |             output = output_cmd.args(args).output()?;
[INFO] [stderr] 366 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let output = if self.has_wait { output_cmd.args(args).arg("--wait").output()? } else { ..; output_cmd.args(args).output()? };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lib.rs:369:13
[INFO] [stderr]     |
[INFO] [stderr] 369 | /             match file_lock {
[INFO] [stderr] 370 | |                 Some(f) => drop(f),
[INFO] [stderr] 371 | |                 None => (),
[INFO] [stderr] 372 | |             };
[INFO] [stderr]     | |_____________^ help: try this: `if let Some(f) = file_lock { drop(f) }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:272:41
[INFO] [stderr]     |
[INFO] [stderr] 272 |         for item in output.trim().split("\n") {
[INFO] [stderr]     |                                         ^^^^ help: try using a char instead: `'\n'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:273:37
[INFO] [stderr]     |
[INFO] [stderr] 273 |             let fields = item.split(" ").collect::<Vec<&str>>();
[INFO] [stderr]     |                                     ^^^ help: try using a char instead: `' '`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/lib.rs:336:41
[INFO] [stderr]     |
[INFO] [stderr] 336 |         for item in output.trim().split("\n") {
[INFO] [stderr]     |                                         ^^^^ help: try using a char instead: `'\n'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/lib.rs:346:9
[INFO] [stderr]     |
[INFO] [stderr] 346 | /         let output;
[INFO] [stderr] 347 | |
[INFO] [stderr] 348 | |         if self.has_wait {
[INFO] [stderr] 349 | |             output = output_cmd.args(args).arg("--wait").output()?;
[INFO] [stderr] ...   |
[INFO] [stderr] 365 | |             output = output_cmd.args(args).output()?;
[INFO] [stderr] 366 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let output = if self.has_wait { output_cmd.args(args).arg("--wait").output()? } else { ..; output_cmd.args(args).output()? };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lib.rs:369:13
[INFO] [stderr]     |
[INFO] [stderr] 369 | /             match file_lock {
[INFO] [stderr] 370 | |                 Some(f) => drop(f),
[INFO] [stderr] 371 | |                 None => (),
[INFO] [stderr] 372 | |             };
[INFO] [stderr]     | |_____________^ help: try this: `if let Some(f) = file_lock { drop(f) }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.05s
[INFO] running `"docker" "inspect" "4aefeb35f749b04f40c1ee4fe8f5053a4f71d2dcb7263cb649c6c235a98ebb64"`
[INFO] running `"docker" "rm" "-f" "4aefeb35f749b04f40c1ee4fe8f5053a4f71d2dcb7263cb649c6c235a98ebb64"`
[INFO] [stdout] 4aefeb35f749b04f40c1ee4fe8f5053a4f71d2dcb7263cb649c6c235a98ebb64