[INFO] crate envrc 0.3.0 is already in cache
[INFO] extracting crate envrc 0.3.0 into work/ex/clippy-test-run/sources/stable/reg/envrc/0.3.0
[INFO] extracting crate envrc 0.3.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/envrc/0.3.0
[INFO] validating manifest of envrc-0.3.0 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of envrc-0.3.0 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing envrc-0.3.0
[INFO] finished frobbing envrc-0.3.0
[INFO] frobbed toml for envrc-0.3.0 written to work/ex/clippy-test-run/sources/stable/reg/envrc/0.3.0/Cargo.toml
[INFO] started frobbing envrc-0.3.0
[INFO] finished frobbing envrc-0.3.0
[INFO] frobbed toml for envrc-0.3.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/envrc/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting envrc-0.3.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/envrc/0.3.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 38bf88d092443e229c2df812d589ae062fda42db6a2ab7ae183d1c6572dd1e98
[INFO] running `"docker" "start" "-a" "38bf88d092443e229c2df812d589ae062fda42db6a2ab7ae183d1c6572dd1e98"`
[INFO] [stderr]     Checking envrc v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:226:5
[INFO] [stderr]     |
[INFO] [stderr] 226 |     return true
[INFO] [stderr]     |     ^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:399:5
[INFO] [stderr]     |
[INFO] [stderr] 399 |     return Some(AllowError::AllowDenied)
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(AllowError::AllowDenied)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:431:5
[INFO] [stderr]     |
[INFO] [stderr] 431 |     return ret
[INFO] [stderr]     |     ^^^^^^^^^^ help: remove `return` as shown: `ret`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:226:5
[INFO] [stderr]     |
[INFO] [stderr] 226 |     return true
[INFO] [stderr]     |     ^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:399:5
[INFO] [stderr]     |
[INFO] [stderr] 399 |     return Some(AllowError::AllowDenied)
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(AllowError::AllowDenied)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:431:5
[INFO] [stderr]     |
[INFO] [stderr] 431 |     return ret
[INFO] [stderr]     |     ^^^^^^^^^^ help: remove `return` as shown: `ret`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/main.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |       if let Some(_) = matches.subcommand_matches("bash") {
[INFO] [stderr]    |  _____-      ^^^^^^^
[INFO] [stderr] 38 | |         do_bash();
[INFO] [stderr] 39 | |     }
[INFO] [stderr] 40 | |     else if let Some(_) = matches.subcommand_matches("allow") {
[INFO] [stderr] ...  |
[INFO] [stderr] 63 | |         prune_allow();
[INFO] [stderr] 64 | |     }
[INFO] [stderr]    | |_____- help: try this: `if matches.subcommand_matches("bash").is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/main.rs:40:17
[INFO] [stderr]    |
[INFO] [stderr] 40 |       else if let Some(_) = matches.subcommand_matches("allow") {
[INFO] [stderr]    |  __________-      ^^^^^^^
[INFO] [stderr] 41 | |         let cur_dir = current_dir().unwrap();
[INFO] [stderr] 42 | |         let rc_found = find_envrc(cur_dir).unwrap();
[INFO] [stderr] 43 | |         add_allow(&rc_found);
[INFO] [stderr] ...  |
[INFO] [stderr] 63 | |         prune_allow();
[INFO] [stderr] 64 | |     }
[INFO] [stderr]    | |_____- help: try this: `if matches.subcommand_matches("allow").is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/main.rs:49:27
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let dir = PathBuf::from(path.clone());
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `PathBuf::from()`: `path.clone()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/main.rs:62:17
[INFO] [stderr]    |
[INFO] [stderr] 62 |       else if let Some(_) = matches.subcommand_matches("prune") {
[INFO] [stderr]    |  __________-      ^^^^^^^
[INFO] [stderr] 63 | |         prune_allow();
[INFO] [stderr] 64 | |     }
[INFO] [stderr]    | |_____- help: try this: `if matches.subcommand_matches("prune").is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/main.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |       if let Some(_) = matches.subcommand_matches("bash") {
[INFO] [stderr]    |  _____-      ^^^^^^^
[INFO] [stderr] 38 | |         do_bash();
[INFO] [stderr] 39 | |     }
[INFO] [stderr] 40 | |     else if let Some(_) = matches.subcommand_matches("allow") {
[INFO] [stderr] ...  |
[INFO] [stderr] 63 | |         prune_allow();
[INFO] [stderr] 64 | |     }
[INFO] [stderr]    | |_____- help: try this: `if matches.subcommand_matches("bash").is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/main.rs:40:17
[INFO] [stderr]    |
[INFO] [stderr] 40 |       else if let Some(_) = matches.subcommand_matches("allow") {
[INFO] [stderr]    |  __________-      ^^^^^^^
[INFO] [stderr] 41 | |         let cur_dir = current_dir().unwrap();
[INFO] [stderr] 42 | |         let rc_found = find_envrc(cur_dir).unwrap();
[INFO] [stderr] 43 | |         add_allow(&rc_found);
[INFO] [stderr] ...  |
[INFO] [stderr] 63 | |         prune_allow();
[INFO] [stderr] 64 | |     }
[INFO] [stderr]    | |_____- help: try this: `if matches.subcommand_matches("allow").is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/main.rs:49:27
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let dir = PathBuf::from(path.clone());
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `PathBuf::from()`: `path.clone()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/main.rs:62:17
[INFO] [stderr]    |
[INFO] [stderr] 62 |       else if let Some(_) = matches.subcommand_matches("prune") {
[INFO] [stderr]    |  __________-      ^^^^^^^
[INFO] [stderr] 63 | |         prune_allow();
[INFO] [stderr] 64 | |     }
[INFO] [stderr]    | |_____- help: try this: `if matches.subcommand_matches("prune").is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/main.rs:93:15
[INFO] [stderr]    |
[INFO] [stderr] 93 |       let end = format!(r#"
[INFO] [stderr]    |  _______________^
[INFO] [stderr] 94 | | break
[INFO] [stderr] 95 | | done
[INFO] [stderr] 96 | | }}"#);
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let end = r#"
[INFO] [stderr] 94 | break
[INFO] [stderr] 95 | done
[INFO] [stderr] 96 | }}"#.to_string();
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/main.rs:93:15
[INFO] [stderr]    |
[INFO] [stderr] 93 |       let end = format!(r#"
[INFO] [stderr]    |  _______________^
[INFO] [stderr] 94 | | break
[INFO] [stderr] 95 | | done
[INFO] [stderr] 96 | | }}"#);
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let end = r#"
[INFO] [stderr] 94 | break
[INFO] [stderr] 95 | done
[INFO] [stderr] 96 | }}"#.to_string();
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/main.rs:129:17
[INFO] [stderr]     |
[INFO] [stderr] 129 |           let p = format!(r#"
[INFO] [stderr]     |  _________________^
[INFO] [stderr] 130 | | if [ -n "$ENVRC_LOAD" -a -z "$envrc_loaded" ]
[INFO] [stderr] 131 | | then
[INFO] [stderr] 132 | |     envrc_loaded=1
[INFO] [stderr] ...   |
[INFO] [stderr] 141 | | envrc_not_allowed=
[INFO] [stderr] 142 | |             "#);
[INFO] [stderr]     | |_______________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]     |
[INFO] [stderr] 129 |         let p = r#"
[INFO] [stderr] 130 | if [ -n "$ENVRC_LOAD" -a -z "$envrc_loaded" ]
[INFO] [stderr] 131 | then
[INFO] [stderr] 132 |     envrc_loaded=1
[INFO] [stderr] 133 |     echo "envrc: loading [$ENVRC_LOAD]"
[INFO] [stderr] 134 |     if [ -f "$ENVRC_LOAD" ]
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/main.rs:129:17
[INFO] [stderr]     |
[INFO] [stderr] 129 |           let p = format!(r#"
[INFO] [stderr]     |  _________________^
[INFO] [stderr] 130 | | if [ -n "$ENVRC_LOAD" -a -z "$envrc_loaded" ]
[INFO] [stderr] 131 | | then
[INFO] [stderr] 132 | |     envrc_loaded=1
[INFO] [stderr] ...   |
[INFO] [stderr] 141 | | envrc_not_allowed=
[INFO] [stderr] 142 | |             "#);
[INFO] [stderr]     | |_______________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]     |
[INFO] [stderr] 129 |         let p = r#"
[INFO] [stderr] 130 | if [ -n "$ENVRC_LOAD" -a -z "$envrc_loaded" ]
[INFO] [stderr] 131 | then
[INFO] [stderr] 132 |     envrc_loaded=1
[INFO] [stderr] 133 |     echo "envrc: loading [$ENVRC_LOAD]"
[INFO] [stderr] 134 |     if [ -f "$ENVRC_LOAD" ]
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/main.rs:212:24
[INFO] [stderr]     |
[INFO] [stderr] 212 | fn is_out_of_scope(rc: &String) -> bool {
[INFO] [stderr]     |                        ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/main.rs:229:18
[INFO] [stderr]     |
[INFO] [stderr] 229 | fn add_allow(rc: &String) {
[INFO] [stderr]     |                  ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/main.rs:212:24
[INFO] [stderr]     |
[INFO] [stderr] 212 | fn is_out_of_scope(rc: &String) -> bool {
[INFO] [stderr]     |                        ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/main.rs:229:18
[INFO] [stderr]     |
[INFO] [stderr] 229 | fn add_allow(rc: &String) {
[INFO] [stderr]     |                  ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/main.rs:258:21
[INFO] [stderr]     |
[INFO] [stderr] 258 | fn remove_allow(rc: &String) {
[INFO] [stderr]     |                     ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/main.rs:258:21
[INFO] [stderr]     |
[INFO] [stderr] 258 | fn remove_allow(rc: &String) {
[INFO] [stderr]     |                     ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/main.rs:307:12
[INFO] [stderr]     |
[INFO] [stderr] 307 |         if path.is_file() == false {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!path.is_file()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/main.rs:320:26
[INFO] [stderr]     |
[INFO] [stderr] 320 | fn update_if_allowed(rc: &String) {
[INFO] [stderr]     |                          ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/main.rs:307:12
[INFO] [stderr]     |
[INFO] [stderr] 307 |         if path.is_file() == false {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!path.is_file()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: this block may be rewritten with the `?` operator
[INFO] [stderr]    --> src/main.rs:378:5
[INFO] [stderr]     |
[INFO] [stderr] 378 | /     if rc.is_none() {
[INFO] [stderr] 379 | |         return None
[INFO] [stderr] 380 | |     }
[INFO] [stderr]     | |_____^ help: replace_it_with: `rc?;`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::question_mark)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/main.rs:320:26
[INFO] [stderr]     |
[INFO] [stderr] 320 | fn update_if_allowed(rc: &String) {
[INFO] [stderr]     |                          ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/main.rs:420:33
[INFO] [stderr]     |
[INFO] [stderr] 420 |         let fields = line.split(" ");
[INFO] [stderr]     |                                 ^^^ help: try using a char instead: `' '`
[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: this block may be rewritten with the `?` operator
[INFO] [stderr]    --> src/main.rs:378:5
[INFO] [stderr]     |
[INFO] [stderr] 378 | /     if rc.is_none() {
[INFO] [stderr] 379 | |         return None
[INFO] [stderr] 380 | |     }
[INFO] [stderr]     | |_____^ help: replace_it_with: `rc?;`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::question_mark)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/main.rs:420:33
[INFO] [stderr]     |
[INFO] [stderr] 420 |         let fields = line.split(" ");
[INFO] [stderr]     |                                 ^^^ help: try using a char instead: `' '`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.48s
[INFO] running `"docker" "inspect" "38bf88d092443e229c2df812d589ae062fda42db6a2ab7ae183d1c6572dd1e98"`
[INFO] running `"docker" "rm" "-f" "38bf88d092443e229c2df812d589ae062fda42db6a2ab7ae183d1c6572dd1e98"`
[INFO] [stdout] 38bf88d092443e229c2df812d589ae062fda42db6a2ab7ae183d1c6572dd1e98