[INFO] updating cached repository williamg/abacus
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/williamg/abacus
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/williamg/abacus" "work/ex/clippy-test-run/sources/stable/gh/williamg/abacus"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/williamg/abacus'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/williamg/abacus" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/williamg/abacus"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/williamg/abacus'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b5f5993a657102b42de728f8992c017b299c8c3
[INFO] sha for GitHub repo williamg/abacus: 3b5f5993a657102b42de728f8992c017b299c8c3
[INFO] validating manifest of williamg/abacus 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 williamg/abacus 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 williamg/abacus
[INFO] finished frobbing williamg/abacus
[INFO] frobbed toml for williamg/abacus written to work/ex/clippy-test-run/sources/stable/gh/williamg/abacus/Cargo.toml
[INFO] started frobbing williamg/abacus
[INFO] finished frobbing williamg/abacus
[INFO] frobbed toml for williamg/abacus written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/williamg/abacus/Cargo.toml
[INFO] crate williamg/abacus has a lockfile. skipping
[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 williamg/abacus against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/williamg/abacus:/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 -Dclippy::into_iter_on_array" "-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] 0e55aaad906e847dfb39f132247dfac434f6d7347f664d57e9edda59f8ff12b4
[INFO] running `"docker" "start" "-a" "0e55aaad906e847dfb39f132247dfac434f6d7347f664d57e9edda59f8ff12b4"`
[INFO] [stderr]     Checking abacus v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 | /     return match d {
[INFO] [stderr] 53 | |         48...58 => Some(d - 48),
[INFO] [stderr] 54 | |          _ => None
[INFO] [stderr] 55 | |     }
[INFO] [stderr]    | |_____^
[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] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 52 |     match d {
[INFO] [stderr] 53 |         48...58 => Some(d - 48),
[INFO] [stderr] 54 |          _ => None
[INFO] [stderr] 55 |     }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 | /     return match to_digit(c) {
[INFO] [stderr] 61 | |         Some(_) => true,
[INFO] [stderr] 62 | |         None => false
[INFO] [stderr] 63 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 60 |     match to_digit(c) {
[INFO] [stderr] 61 |         Some(_) => true,
[INFO] [stderr] 62 |         None => false
[INFO] [stderr] 63 |     }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     return match d {
[INFO] [stderr] 70 | |         65...90 | 97...122 => true,
[INFO] [stderr] 71 | |         _ => false
[INFO] [stderr] 72 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 69 |     match d {
[INFO] [stderr] 70 |         65...90 | 97...122 => true,
[INFO] [stderr] 71 |         _ => false
[INFO] [stderr] 72 |     }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | /     return match c {
[INFO] [stderr] 78 | |         ')' | '(' | '[' | ']' => true,
[INFO] [stderr] 79 | |         _ => false
[INFO] [stderr] 80 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 77 |     match c {
[INFO] [stderr] 78 |         ')' | '(' | '[' | ']' => true,
[INFO] [stderr] 79 |         _ => false
[INFO] [stderr] 80 |     }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:130:9
[INFO] [stderr]     |
[INFO] [stderr] 130 |         return Some(Num::Decimal(whole_num, decimal, exponent));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(Num::Decimal(whole_num, decimal, exponent))`
[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/lexer.rs:132:9
[INFO] [stderr]     |
[INFO] [stderr] 132 |         return Some(Num::Integer(whole_num));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(Num::Integer(whole_num))`
[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/lexer.rs:153:9
[INFO] [stderr]     |
[INFO] [stderr] 153 |         return None;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/lexer.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 155 |         return Some(s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(s)`
[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/lexer.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |         return None;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/lexer.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |         return Some(s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(s)`
[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/lexer.rs:221:5
[INFO] [stderr]     |
[INFO] [stderr] 221 |     return v;
[INFO] [stderr]     |     ^^^^^^^^^ help: remove `return` as shown: `v`
[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/lexer.rs:233:5
[INFO] [stderr]     |
[INFO] [stderr] 233 |     return _lex(&mut chars);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `_lex(&mut chars)`
[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/lexer.rs:246:9
[INFO] [stderr]     |
[INFO] [stderr] 246 |         return string;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `string`
[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/lexer.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 | /     return match d {
[INFO] [stderr] 53 | |         48...58 => Some(d - 48),
[INFO] [stderr] 54 | |          _ => None
[INFO] [stderr] 55 | |     }
[INFO] [stderr]    | |_____^
[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] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 52 |     match d {
[INFO] [stderr] 53 |         48...58 => Some(d - 48),
[INFO] [stderr] 54 |          _ => None
[INFO] [stderr] 55 |     }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 | /     return match to_digit(c) {
[INFO] [stderr] 61 | |         Some(_) => true,
[INFO] [stderr] 62 | |         None => false
[INFO] [stderr] 63 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 60 |     match to_digit(c) {
[INFO] [stderr] 61 |         Some(_) => true,
[INFO] [stderr] 62 |         None => false
[INFO] [stderr] 63 |     }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     return match d {
[INFO] [stderr] 70 | |         65...90 | 97...122 => true,
[INFO] [stderr] 71 | |         _ => false
[INFO] [stderr] 72 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 69 |     match d {
[INFO] [stderr] 70 |         65...90 | 97...122 => true,
[INFO] [stderr] 71 |         _ => false
[INFO] [stderr] 72 |     }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | /     return match c {
[INFO] [stderr] 78 | |         ')' | '(' | '[' | ']' => true,
[INFO] [stderr] 79 | |         _ => false
[INFO] [stderr] 80 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 77 |     match c {
[INFO] [stderr] 78 |         ')' | '(' | '[' | ']' => true,
[INFO] [stderr] 79 |         _ => false
[INFO] [stderr] 80 |     }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:130:9
[INFO] [stderr]     |
[INFO] [stderr] 130 |         return Some(Num::Decimal(whole_num, decimal, exponent));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(Num::Decimal(whole_num, decimal, exponent))`
[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/lexer.rs:132:9
[INFO] [stderr]     |
[INFO] [stderr] 132 |         return Some(Num::Integer(whole_num));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(Num::Integer(whole_num))`
[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/lexer.rs:153:9
[INFO] [stderr]     |
[INFO] [stderr] 153 |         return None;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/lexer.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 155 |         return Some(s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(s)`
[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/lexer.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |         return None;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/lexer.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |         return Some(s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(s)`
[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/lexer.rs:221:5
[INFO] [stderr]     |
[INFO] [stderr] 221 |     return v;
[INFO] [stderr]     |     ^^^^^^^^^ help: remove `return` as shown: `v`
[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/lexer.rs:233:5
[INFO] [stderr]     |
[INFO] [stderr] 233 |     return _lex(&mut chars);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `_lex(&mut chars)`
[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/lexer.rs:60:12
[INFO] [stderr]    |
[INFO] [stderr] 60 |       return match to_digit(c) {
[INFO] [stderr]    |  ____________^
[INFO] [stderr] 61 | |         Some(_) => true,
[INFO] [stderr] 62 | |         None => false
[INFO] [stderr] 63 | |     }
[INFO] [stderr]    | |_____^ help: try this: `to_digit(c).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: equality checks against false can be replaced by a negation
[INFO] [stderr]   --> src/lexer.rs:98:16
[INFO] [stderr]    |
[INFO] [stderr] 98 |             if is_num(c) == false && c != '.' {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!is_num(c)`
[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: casting u8 to i64 may become silently lossy if types change
[INFO] [stderr]    --> src/lexer.rs:108:30
[INFO] [stderr]     |
[INFO] [stderr] 108 |                 whole_num += d as i64;
[INFO] [stderr]     |                              ^^^^^^^^ help: try: `i64::from(d)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u64 may become silently lossy if types change
[INFO] [stderr]    --> src/lexer.rs:114:28
[INFO] [stderr]     |
[INFO] [stderr] 114 |                 decimal += d as u64;
[INFO] [stderr]     |                            ^^^^^^^^ help: try: `u64::from(d)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u64 may become silently lossy if types change
[INFO] [stderr]    --> src/lexer.rs:118:28
[INFO] [stderr]     |
[INFO] [stderr] 118 |                 decimal += d as u64;
[INFO] [stderr]     |                            ^^^^^^^^ help: try: `u64::from(d)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/lexer.rs:60:12
[INFO] [stderr]    |
[INFO] [stderr] 60 |       return match to_digit(c) {
[INFO] [stderr]    |  ____________^
[INFO] [stderr] 61 | |         Some(_) => true,
[INFO] [stderr] 62 | |         None => false
[INFO] [stderr] 63 | |     }
[INFO] [stderr]    | |_____^ help: try this: `to_digit(c).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: equality checks against false can be replaced by a negation
[INFO] [stderr]   --> src/lexer.rs:98:16
[INFO] [stderr]    |
[INFO] [stderr] 98 |             if is_num(c) == false && c != '.' {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!is_num(c)`
[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: casting u8 to i64 may become silently lossy if types change
[INFO] [stderr]    --> src/lexer.rs:108:30
[INFO] [stderr]     |
[INFO] [stderr] 108 |                 whole_num += d as i64;
[INFO] [stderr]     |                              ^^^^^^^^ help: try: `i64::from(d)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u64 may become silently lossy if types change
[INFO] [stderr]    --> src/lexer.rs:114:28
[INFO] [stderr]     |
[INFO] [stderr] 114 |                 decimal += d as u64;
[INFO] [stderr]     |                            ^^^^^^^^ help: try: `u64::from(d)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u64 may become silently lossy if types change
[INFO] [stderr]    --> src/lexer.rs:118:28
[INFO] [stderr]     |
[INFO] [stderr] 118 |                 decimal += d as u64;
[INFO] [stderr]     |                            ^^^^^^^^ help: try: `u64::from(d)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "0e55aaad906e847dfb39f132247dfac434f6d7347f664d57e9edda59f8ff12b4"`
[INFO] running `"docker" "rm" "-f" "0e55aaad906e847dfb39f132247dfac434f6d7347f664d57e9edda59f8ff12b4"`
[INFO] [stdout] 0e55aaad906e847dfb39f132247dfac434f6d7347f664d57e9edda59f8ff12b4