[INFO] updating cached repository phreaknik/rusty-math
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/phreaknik/rusty-math
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/phreaknik/rusty-math" "work/ex/clippy-test-run/sources/stable/gh/phreaknik/rusty-math"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/phreaknik/rusty-math'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/phreaknik/rusty-math" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/phreaknik/rusty-math"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/phreaknik/rusty-math'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a4110dd2dce91a409c16b45c7326077ffdd24365
[INFO] sha for GitHub repo phreaknik/rusty-math: a4110dd2dce91a409c16b45c7326077ffdd24365
[INFO] validating manifest of phreaknik/rusty-math 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 phreaknik/rusty-math 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 phreaknik/rusty-math
[INFO] finished frobbing phreaknik/rusty-math
[INFO] frobbed toml for phreaknik/rusty-math written to work/ex/clippy-test-run/sources/stable/gh/phreaknik/rusty-math/Cargo.toml
[INFO] started frobbing phreaknik/rusty-math
[INFO] finished frobbing phreaknik/rusty-math
[INFO] frobbed toml for phreaknik/rusty-math written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/phreaknik/rusty-math/Cargo.toml
[INFO] crate phreaknik/rusty-math 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 phreaknik/rusty-math 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-5/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/phreaknik/rusty-math:/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] 99be76c124c0cc0acba9d31321d6081382501481ec5597933a2ff51bfa53e95d
[INFO] running `"docker" "start" "-a" "99be76c124c0cc0acba9d31321d6081382501481ec5597933a2ff51bfa53e95d"`
[INFO] [stderr]     Checking clap v2.29.0
[INFO] [stderr]     Checking rusty-math v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/polydiv.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     return c;
[INFO] [stderr]    |     ^^^^^^^^^ help: remove `return` as shown: `c`
[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/polydiv.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     return (q, n);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `(q, n)`
[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/ascii85.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     return (mode, s);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(mode, 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/ascii85.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     return String::from_utf8(bytes).unwrap_or("".to_string());
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `String::from_utf8(bytes).unwrap_or("".to_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: long literal lacking separators
[INFO] [stderr]   --> src/ascii85.rs:90:30
[INFO] [stderr]    |
[INFO] [stderr] 90 |             bytes.push(((n & 0xFF000000) >> 24)  as u8);
[INFO] [stderr]    |                              ^^^^^^^^^^ help: consider: `0xFF00_0000`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/ascii85.rs:145:5
[INFO] [stderr]     |
[INFO] [stderr] 145 |     return String::from_utf8(rad85).unwrap_or("".to_string());
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `String::from_utf8(rad85).unwrap_or("".to_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/polydiv.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     return c;
[INFO] [stderr]    |     ^^^^^^^^^ help: remove `return` as shown: `c`
[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/polydiv.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     return (q, n);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `(q, n)`
[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/ascii85.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     return (mode, s);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(mode, 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/ascii85.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     return String::from_utf8(bytes).unwrap_or("".to_string());
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `String::from_utf8(bytes).unwrap_or("".to_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: long literal lacking separators
[INFO] [stderr]   --> src/ascii85.rs:90:30
[INFO] [stderr]    |
[INFO] [stderr] 90 |             bytes.push(((n & 0xFF000000) >> 24)  as u8);
[INFO] [stderr]    |                              ^^^^^^^^^^ help: consider: `0xFF00_0000`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/ascii85.rs:145:5
[INFO] [stderr]     |
[INFO] [stderr] 145 |     return String::from_utf8(rad85).unwrap_or("".to_string());
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `String::from_utf8(rad85).unwrap_or("".to_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] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]   --> src/polydiv.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     if s.len() <= 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::absurd_extreme_comparisons)] on by default
[INFO] [stderr]    = help: because 0 is the minimum value for this type, the case where the two sides are not equal never occurs, consider using s.len() == 0 instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/polydiv.rs:71:43
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn divide_polynomials(mut n: Vec<f32>, d: &Vec<f32>) -> (Vec<f32>, Vec<f32>) {
[INFO] [stderr]    |                                           ^^^^^^^^^ help: change this to: `&[f32]`
[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 `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/polydiv.rs:106:24
[INFO] [stderr]     |
[INFO] [stderr] 106 | fn print_polynomial(c: &Vec<f32>) {
[INFO] [stderr]     |                        ^^^^^^^^^ help: change this to: `&[f32]`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/ascii85.rs:77:29
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let mut temp: u32 = w[0] as u32;
[INFO] [stderr]    |                             ^^^^^^^^^^^ help: try: `u32::from(w[0])`
[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: the loop variable `i` is only used to index `w`.
[INFO] [stderr]   --> src/ascii85.rs:78:18
[INFO] [stderr]    |
[INFO] [stderr] 78 |         for i in 1..w.len() {
[INFO] [stderr]    |                  ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 78 |         for <item> in w.iter().skip(1) {
[INFO] [stderr]    |             ^^^^^^    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/ascii85.rs:80:21
[INFO] [stderr]    |
[INFO] [stderr] 80 |             temp += w[i] as u32;
[INFO] [stderr]    |                     ^^^^^^^^^^^ help: try: `u32::from(w[i])`
[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: manual implementation of an assign operation
[INFO] [stderr]   --> src/ascii85.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |             n = n << 8;
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `n <<= 8`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/ascii85.rs:99:37
[INFO] [stderr]    |
[INFO] [stderr] 99 |     return String::from_utf8(bytes).unwrap_or("".to_string());
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| "".to_string())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/ascii85.rs:111:50
[INFO] [stderr]     |
[INFO] [stderr] 111 |             .fold(0, |acc: u32, &x| (acc << 8) + (x as u32));
[INFO] [stderr]     |                                                  ^^^^^^^^^^ help: try: `u32::from(x)`
[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: use of `unwrap_or` followed by a function call
[INFO] [stderr]    --> src/ascii85.rs:145:37
[INFO] [stderr]     |
[INFO] [stderr] 145 |     return String::from_utf8(rad85).unwrap_or("".to_string());
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| "".to_string())`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rusty-math`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]   --> src/polydiv.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     if s.len() <= 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::absurd_extreme_comparisons)] on by default
[INFO] [stderr]    = help: because 0 is the minimum value for this type, the case where the two sides are not equal never occurs, consider using s.len() == 0 instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/polydiv.rs:71:43
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn divide_polynomials(mut n: Vec<f32>, d: &Vec<f32>) -> (Vec<f32>, Vec<f32>) {
[INFO] [stderr]    |                                           ^^^^^^^^^ help: change this to: `&[f32]`
[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 `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/polydiv.rs:106:24
[INFO] [stderr]     |
[INFO] [stderr] 106 | fn print_polynomial(c: &Vec<f32>) {
[INFO] [stderr]     |                        ^^^^^^^^^ help: change this to: `&[f32]`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/ascii85.rs:77:29
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let mut temp: u32 = w[0] as u32;
[INFO] [stderr]    |                             ^^^^^^^^^^^ help: try: `u32::from(w[0])`
[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: the loop variable `i` is only used to index `w`.
[INFO] [stderr]   --> src/ascii85.rs:78:18
[INFO] [stderr]    |
[INFO] [stderr] 78 |         for i in 1..w.len() {
[INFO] [stderr]    |                  ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 78 |         for <item> in w.iter().skip(1) {
[INFO] [stderr]    |             ^^^^^^    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/ascii85.rs:80:21
[INFO] [stderr]    |
[INFO] [stderr] 80 |             temp += w[i] as u32;
[INFO] [stderr]    |                     ^^^^^^^^^^^ help: try: `u32::from(w[i])`
[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: manual implementation of an assign operation
[INFO] [stderr]   --> src/ascii85.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |             n = n << 8;
[INFO] [stderr]    |             ^^^^^^^^^^ help: replace it with: `n <<= 8`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/ascii85.rs:99:37
[INFO] [stderr]    |
[INFO] [stderr] 99 |     return String::from_utf8(bytes).unwrap_or("".to_string());
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| "".to_string())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/ascii85.rs:111:50
[INFO] [stderr]     |
[INFO] [stderr] 111 |             .fold(0, |acc: u32, &x| (acc << 8) + (x as u32));
[INFO] [stderr]     |                                                  ^^^^^^^^^^ help: try: `u32::from(x)`
[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: use of `unwrap_or` followed by a function call
[INFO] [stderr]    --> src/ascii85.rs:145:37
[INFO] [stderr]     |
[INFO] [stderr] 145 |     return String::from_utf8(rad85).unwrap_or("".to_string());
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|_| "".to_string())`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rusty-math`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "99be76c124c0cc0acba9d31321d6081382501481ec5597933a2ff51bfa53e95d"`
[INFO] running `"docker" "rm" "-f" "99be76c124c0cc0acba9d31321d6081382501481ec5597933a2ff51bfa53e95d"`
[INFO] [stdout] 99be76c124c0cc0acba9d31321d6081382501481ec5597933a2ff51bfa53e95d