[INFO] updating cached repository andybalaam/pepper
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/andybalaam/pepper
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/andybalaam/pepper" "work/ex/clippy-test-run/sources/stable/gh/andybalaam/pepper"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/andybalaam/pepper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/andybalaam/pepper" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/andybalaam/pepper"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/andybalaam/pepper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a6d738309bb05dfdc9a949d546ba43cbe5f694c8
[INFO] sha for GitHub repo andybalaam/pepper: a6d738309bb05dfdc9a949d546ba43cbe5f694c8
[INFO] validating manifest of andybalaam/pepper 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 andybalaam/pepper 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 andybalaam/pepper
[INFO] finished frobbing andybalaam/pepper
[INFO] frobbed toml for andybalaam/pepper written to work/ex/clippy-test-run/sources/stable/gh/andybalaam/pepper/Cargo.toml
[INFO] started frobbing andybalaam/pepper
[INFO] finished frobbing andybalaam/pepper
[INFO] frobbed toml for andybalaam/pepper written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/andybalaam/pepper/Cargo.toml
[INFO] crate andybalaam/pepper 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 andybalaam/pepper 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-7/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/andybalaam/pepper:/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] 76b0215a05486d07761ed10f7a1a8f775221a347bed0ed8eb5c70aff8805148b
[INFO] running `"docker" "start" "-a" "76b0215a05486d07761ed10f7a1a8f775221a347bed0ed8eb5c70aff8805148b"`
[INFO] [stderr]     Checking pepper3 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lexing/mod.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             chars: chars,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `chars`
[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/lexing/mod.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             chars: chars,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `chars`
[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: unneeded return statement
[INFO] [stderr]   --> src/lexing/char_iter.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     return UTF8_CHAR_WIDTH[b as usize] as usize;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `UTF8_CHAR_WIDTH[b as usize] as usize`
[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: this `else { if .. }` block can be collapsed
[INFO] [stderr]   --> src/lexing/lex_int.rs:62:16
[INFO] [stderr]    |
[INFO] [stderr] 62 |           } else {
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 63 | |             if !is_digit(ch) {
[INFO] [stderr] 64 | |                 return Err(fix_underscores(&s))
[INFO] [stderr] 65 | |             }
[INFO] [stderr] 66 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 62 |         } else if !is_digit(ch) {
[INFO] [stderr] 63 |     return Err(fix_underscores(&s))
[INFO] [stderr] 64 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexing/char_iter.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     return UTF8_CHAR_WIDTH[b as usize] as usize;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `UTF8_CHAR_WIDTH[b as usize] as usize`
[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: this `else { if .. }` block can be collapsed
[INFO] [stderr]   --> src/lexing/lex_int.rs:62:16
[INFO] [stderr]    |
[INFO] [stderr] 62 |           } else {
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 63 | |             if !is_digit(ch) {
[INFO] [stderr] 64 | |                 return Err(fix_underscores(&s))
[INFO] [stderr] 65 | |             }
[INFO] [stderr] 66 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 62 |         } else if !is_digit(ch) {
[INFO] [stderr] 63 |     return Err(fix_underscores(&s))
[INFO] [stderr] 64 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 | /             world.stderr.write(e.description().as_bytes())
[INFO] [stderr] 14 | |                 .expect("Failed to write an error to error stream.");
[INFO] [stderr]    | |____________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::unused_io_amount)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     stdout.write(b"tokens = import(language.lexing.tokens);\n[\n")?;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:28:17
[INFO] [stderr]    |
[INFO] [stderr] 28 |                 stdout.write(b"    tokens.int(\"")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |                 stdout.write(i.as_bytes())?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:30:17
[INFO] [stderr]    |
[INFO] [stderr] 30 |                 stdout.write(b"\"),\n")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:33:17
[INFO] [stderr]    |
[INFO] [stderr] 33 |                 stdout.write(b"    tokens.symbol(\"")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |                 stdout.write(s.as_bytes())?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:35:17
[INFO] [stderr]    |
[INFO] [stderr] 35 |                 stdout.write(b"\"),\n")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:38:17
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 stdout.write(b"    tokens.operator(\"")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:39:17
[INFO] [stderr]    |
[INFO] [stderr] 39 |                 stdout.write(o.as_bytes())?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:40:17
[INFO] [stderr]    |
[INFO] [stderr] 40 |                 stdout.write(b"\"),\n")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     stdout.write(b"];\n")?;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[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/cmdline/command.rs:13:27
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn identify(all_args: &Vec<String>) -> (Command, Vec<String>) {
[INFO] [stderr]    |                           ^^^^^^^^^^^^ help: change this to: `&[String]`
[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/cmdline/command.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn skip_2(all_args: &Vec<String>) -> Vec<String> {
[INFO] [stderr]    |                     ^^^^^^^^^^^^ help: change this to: `&[String]`
[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] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/mod.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     world.stdout.write(b"3\n").expect("Failed to write 3.");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/mod.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | /     world.stderr.write(b"Shell mode not implemented yet.\n")
[INFO] [stderr] 35 | |         .expect("\
[INFO] [stderr] 36 | |             Failed writing to stderr when complaining \
[INFO] [stderr] 37 | |             that shell mode is not implemented yet.\
[INFO] [stderr] 38 | |         ");
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/lexing/lex_int.rs:54:28
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn validate_underscores(s: &String) -> Result<usize, 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: the variable `n` is used as a loop counter. Consider using `for (n, item) in s.chars().rev().enumerate()` or similar iterators
[INFO] [stderr]   --> src/lexing/lex_int.rs:56:15
[INFO] [stderr]    |
[INFO] [stderr] 56 |     for ch in s.chars().rev() {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/lexing/lex_int.rs:71:23
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn fix_underscores(s: &String) -> 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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/lexing/lex_int.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 | /         match ch {
[INFO] [stderr] 76 | |             '0' ... '9' => {
[INFO] [stderr] 77 | |                 n += 1;
[INFO] [stderr] 78 | |                 if n % 4 == 0 {
[INFO] [stderr] ...  |
[INFO] [stderr] 84 | |             _ => {},
[INFO] [stderr] 85 | |         }
[INFO] [stderr]    | |_________^
[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] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 75 |         if let '0' ... '9' = ch {
[INFO] [stderr] 76 |     n += 1;
[INFO] [stderr] 77 |     if n % 4 == 0 {
[INFO] [stderr] 78 |         ret.push('_');
[INFO] [stderr] 79 |         n += 1;
[INFO] [stderr] 80 |     }
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/lexing/lex_operator.rs:17:21
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn known_name(name: &String) -> bool {
[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] error: aborting due to 14 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `pepper3`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/cmdline/fakereadfile.rs:23:16
[INFO] [stderr]    |
[INFO] [stderr] 23 |             if buf.len() == 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `buf.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 | /             world.stderr.write(e.description().as_bytes())
[INFO] [stderr] 14 | |                 .expect("Failed to write an error to error stream.");
[INFO] [stderr]    | |____________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::unused_io_amount)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     stdout.write(b"tokens = import(language.lexing.tokens);\n[\n")?;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:28:17
[INFO] [stderr]    |
[INFO] [stderr] 28 |                 stdout.write(b"    tokens.int(\"")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |                 stdout.write(i.as_bytes())?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:30:17
[INFO] [stderr]    |
[INFO] [stderr] 30 |                 stdout.write(b"\"),\n")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:33:17
[INFO] [stderr]    |
[INFO] [stderr] 33 |                 stdout.write(b"    tokens.symbol(\"")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |                 stdout.write(s.as_bytes())?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:35:17
[INFO] [stderr]    |
[INFO] [stderr] 35 |                 stdout.write(b"\"),\n")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:38:17
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 stdout.write(b"    tokens.operator(\"")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:39:17
[INFO] [stderr]    |
[INFO] [stderr] 39 |                 stdout.write(o.as_bytes())?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:40:17
[INFO] [stderr]    |
[INFO] [stderr] 40 |                 stdout.write(b"\"),\n")?;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/cmdlex.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     stdout.write(b"];\n")?;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[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/cmdline/cmdlex.rs:87:28
[INFO] [stderr]    |
[INFO] [stderr] 87 |     fn assert_vec_eq(left: &Vec<u8>, right: &[u8]) {
[INFO] [stderr]    |                            ^^^^^^^^
[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] help: change this to
[INFO] [stderr]    |
[INFO] [stderr] 87 |     fn assert_vec_eq(left: &[u8], right: &[u8]) {
[INFO] [stderr]    |                            ^^^^^
[INFO] [stderr] help: change `left.clone()` to
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let sleft = String::from_utf8(left.to_owned());
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^
[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/cmdline/command.rs:13:27
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn identify(all_args: &Vec<String>) -> (Command, Vec<String>) {
[INFO] [stderr]    |                           ^^^^^^^^^^^^ help: change this to: `&[String]`
[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 `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/cmdline/command.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn skip_2(all_args: &Vec<String>) -> Vec<String> {
[INFO] [stderr]    |                     ^^^^^^^^^^^^ help: change this to: `&[String]`
[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] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/mod.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     world.stdout.write(b"3\n").expect("Failed to write 3.");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/cmdline/mod.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | /     world.stderr.write(b"Shell mode not implemented yet.\n")
[INFO] [stderr] 35 | |         .expect("\
[INFO] [stderr] 36 | |             Failed writing to stderr when complaining \
[INFO] [stderr] 37 | |             that shell mode is not implemented yet.\
[INFO] [stderr] 38 | |         ");
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/lexing/lex_int.rs:54:28
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn validate_underscores(s: &String) -> Result<usize, 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: the variable `n` is used as a loop counter. Consider using `for (n, item) in s.chars().rev().enumerate()` or similar iterators
[INFO] [stderr]   --> src/lexing/lex_int.rs:56:15
[INFO] [stderr]    |
[INFO] [stderr] 56 |     for ch in s.chars().rev() {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/lexing/lex_int.rs:71:23
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn fix_underscores(s: &String) -> 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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/lexing/lex_int.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 | /         match ch {
[INFO] [stderr] 76 | |             '0' ... '9' => {
[INFO] [stderr] 77 | |                 n += 1;
[INFO] [stderr] 78 | |                 if n % 4 == 0 {
[INFO] [stderr] ...  |
[INFO] [stderr] 84 | |             _ => {},
[INFO] [stderr] 85 | |         }
[INFO] [stderr]    | |_________^
[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] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 75 |         if let '0' ... '9' = ch {
[INFO] [stderr] 76 |     n += 1;
[INFO] [stderr] 77 |     if n % 4 == 0 {
[INFO] [stderr] 78 |         ret.push('_');
[INFO] [stderr] 79 |         n += 1;
[INFO] [stderr] 80 |     }
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/lexing/lex_operator.rs:17:21
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn known_name(name: &String) -> bool {
[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] error: aborting due to 14 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `pepper3`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "76b0215a05486d07761ed10f7a1a8f775221a347bed0ed8eb5c70aff8805148b"`
[INFO] running `"docker" "rm" "-f" "76b0215a05486d07761ed10f7a1a8f775221a347bed0ed8eb5c70aff8805148b"`
[INFO] [stdout] 76b0215a05486d07761ed10f7a1a8f775221a347bed0ed8eb5c70aff8805148b