[INFO] crate dd-lib 0.2.1 is already in cache
[INFO] extracting crate dd-lib 0.2.1 into work/ex/clippy-test-run/sources/stable/reg/dd-lib/0.2.1
[INFO] extracting crate dd-lib 0.2.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/dd-lib/0.2.1
[INFO] validating manifest of dd-lib-0.2.1 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 dd-lib-0.2.1 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 dd-lib-0.2.1
[INFO] finished frobbing dd-lib-0.2.1
[INFO] frobbed toml for dd-lib-0.2.1 written to work/ex/clippy-test-run/sources/stable/reg/dd-lib/0.2.1/Cargo.toml
[INFO] started frobbing dd-lib-0.2.1
[INFO] finished frobbing dd-lib-0.2.1
[INFO] frobbed toml for dd-lib-0.2.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/dd-lib/0.2.1/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 dd-lib-0.2.1 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/dd-lib/0.2.1:/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] bd5abc2b339d834ddf1a79da6a45920d503c05550a90e0e76b90ea9749a92b5a
[INFO] running `"docker" "start" "-a" "bd5abc2b339d834ddf1a79da6a45920d503c05550a90e0e76b90ea9749a92b5a"`
[INFO] [stderr]     Checking encoding8 v0.3.2
[INFO] [stderr]     Checking dd-lib v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/io/copy.rs:50:17
[INFO] [stderr]    |
[INFO] [stderr] 50 |                 n => c.convert_copy(&buf[..n]),
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 |     let e = ErrHandler::new(err, o);
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:156:27
[INFO] [stderr]     |
[INFO] [stderr] 156 |         opts::Mode::Block(n) => io::copy::block(r, &mut w, c, e, n),
[INFO] [stderr]     |                           ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:157:29
[INFO] [stderr]     |
[INFO] [stderr] 157 |         opts::Mode::Unblock(n) => io::copy::unblock(r, &mut w, c, e, n),
[INFO] [stderr]     |                             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/io/copy.rs:50:17
[INFO] [stderr]    |
[INFO] [stderr] 50 |                 n => c.convert_copy(&buf[..n]),
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 |     let e = ErrHandler::new(err, o);
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:156:27
[INFO] [stderr]     |
[INFO] [stderr] 156 |         opts::Mode::Block(n) => io::copy::block(r, &mut w, c, e, n),
[INFO] [stderr]     |                           ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:157:29
[INFO] [stderr]     |
[INFO] [stderr] 157 |         opts::Mode::Unblock(n) => io::copy::unblock(r, &mut w, c, e, n),
[INFO] [stderr]     |                             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/io/read.rs:95:17
[INFO] [stderr]    |
[INFO] [stderr] 95 | /                 return Err(Error::from(ConflictingOption(
[INFO] [stderr] 96 | |                     "iflag 'append' is only usable with an input file",
[INFO] [stderr] 97 | |                 )))
[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] 95 |                 Err(Error::from(ConflictingOption(
[INFO] [stderr] 96 |                     "iflag 'append' is only usable with an input file",
[INFO] [stderr] 97 |                 )))
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/io/read.rs:100:17
[INFO] [stderr]     |
[INFO] [stderr] 100 | /                 return Err(Error::from(ConflictingOption(
[INFO] [stderr] 101 | |                     "options 'input_seek' and 'seek_bytes' are only usable with an input file",
[INFO] [stderr] 102 | |                 )))
[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] 100 |                 Err(Error::from(ConflictingOption(
[INFO] [stderr] 101 |                     "options 'input_seek' and 'seek_bytes' are only usable with an input file",
[INFO] [stderr] 102 |                 )))
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/io/copy.rs:25:30
[INFO] [stderr]    |
[INFO] [stderr] 25 |             Some(ref buf) if buf.len() == 0 => return Ok(Success::Bytes { bytes, start }),
[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] warning: length comparison to zero
[INFO] [stderr]   --> src/io/copy.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         buf.len() != 0
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!buf.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/io/copy.rs:131:9
[INFO] [stderr]     |
[INFO] [stderr] 131 |         buf.len() != 0
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!buf.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: The function/method `write_all` doesn't need a mutable reference
[INFO] [stderr]    --> src/io/copy.rs:136:30
[INFO] [stderr]     |
[INFO] [stderr] 136 |         e.handle(w.write_all(&mut buf))?;
[INFO] [stderr]     |                              ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unnecessary_mut_passed)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_mut_passed
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/io/conv.rs:124:19
[INFO] [stderr]     |
[INFO] [stderr] 124 |     pub fn new(c: &CFlag) -> Result<Self> {
[INFO] [stderr]     |                   ^^^^^^ help: consider passing by value instead: `CFlag`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/io/conv.rs:151:15
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn new(c: &CFlag) -> Result<Self> {
[INFO] [stderr]     |               ^^^^^^ help: consider passing by value instead: `CFlag`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 writeln!(self.e, "io error: <{}>; continuing", err);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 | /             writeln!(
[INFO] [stderr] 73 | |                 self,
[INFO] [stderr] 74 | |                 "dd in progress: unblock: elapsed: {}, wrote {} lines",
[INFO] [stderr] 75 | |                 elapsed(&start),
[INFO] [stderr] 76 | |                 lines
[INFO] [stderr] 77 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:83:13
[INFO] [stderr]    |
[INFO] [stderr] 83 | /             writeln!(
[INFO] [stderr] 84 | |                 self,
[INFO] [stderr] 85 | |                 "dd in progress: unblock: elapsed: {}, wrote {} fixed-length blocks",
[INFO] [stderr] 86 | |                 elapsed(&start),
[INFO] [stderr] 87 | |                 blocks
[INFO] [stderr] 88 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/opts/flags/cflag.rs:96:60
[INFO] [stderr]    |
[INFO] [stderr] 96 |         for flag in s.split(',').map(str::trim).filter(|s| s.len() > 0) {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!s.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/opts/flags/iflag.rs:69:60
[INFO] [stderr]    |
[INFO] [stderr] 69 |         for flag in s.split(',').map(str::trim).filter(|s| s.len() > 0) {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!s.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/opts/flags/oflag.rs:60:60
[INFO] [stderr]    |
[INFO] [stderr] 60 |         for flag in s.split(',').map(str::trim).filter(|s| s.len() > 0) {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!s.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/opts/mod.rs:335:29
[INFO] [stderr]     |
[INFO] [stderr] 335 |     let mut split = s.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: unneeded return statement
[INFO] [stderr]   --> src/io/read.rs:95:17
[INFO] [stderr]    |
[INFO] [stderr] 95 | /                 return Err(Error::from(ConflictingOption(
[INFO] [stderr] 96 | |                     "iflag 'append' is only usable with an input file",
[INFO] [stderr] 97 | |                 )))
[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] 95 |                 Err(Error::from(ConflictingOption(
[INFO] [stderr] 96 |                     "iflag 'append' is only usable with an input file",
[INFO] [stderr] 97 |                 )))
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/io/read.rs:100:17
[INFO] [stderr]     |
[INFO] [stderr] 100 | /                 return Err(Error::from(ConflictingOption(
[INFO] [stderr] 101 | |                     "options 'input_seek' and 'seek_bytes' are only usable with an input file",
[INFO] [stderr] 102 | |                 )))
[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] 100 |                 Err(Error::from(ConflictingOption(
[INFO] [stderr] 101 |                     "options 'input_seek' and 'seek_bytes' are only usable with an input file",
[INFO] [stderr] 102 |                 )))
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/io/copy.rs:25:30
[INFO] [stderr]    |
[INFO] [stderr] 25 |             Some(ref buf) if buf.len() == 0 => return Ok(Success::Bytes { bytes, start }),
[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] warning: length comparison to zero
[INFO] [stderr]   --> src/io/copy.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         buf.len() != 0
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!buf.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/io/copy.rs:131:9
[INFO] [stderr]     |
[INFO] [stderr] 131 |         buf.len() != 0
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!buf.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: The function/method `write_all` doesn't need a mutable reference
[INFO] [stderr]    --> src/io/copy.rs:136:30
[INFO] [stderr]     |
[INFO] [stderr] 136 |         e.handle(w.write_all(&mut buf))?;
[INFO] [stderr]     |                              ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unnecessary_mut_passed)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_mut_passed
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/io/conv.rs:124:19
[INFO] [stderr]     |
[INFO] [stderr] 124 |     pub fn new(c: &CFlag) -> Result<Self> {
[INFO] [stderr]     |                   ^^^^^^ help: consider passing by value instead: `CFlag`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/io/conv.rs:151:15
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn new(c: &CFlag) -> Result<Self> {
[INFO] [stderr]     |               ^^^^^^ help: consider passing by value instead: `CFlag`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 writeln!(self.e, "io error: <{}>; continuing", err);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 | /             writeln!(
[INFO] [stderr] 73 | |                 self,
[INFO] [stderr] 74 | |                 "dd in progress: unblock: elapsed: {}, wrote {} lines",
[INFO] [stderr] 75 | |                 elapsed(&start),
[INFO] [stderr] 76 | |                 lines
[INFO] [stderr] 77 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/io/errhandler.rs:83:13
[INFO] [stderr]    |
[INFO] [stderr] 83 | /             writeln!(
[INFO] [stderr] 84 | |                 self,
[INFO] [stderr] 85 | |                 "dd in progress: unblock: elapsed: {}, wrote {} fixed-length blocks",
[INFO] [stderr] 86 | |                 elapsed(&start),
[INFO] [stderr] 87 | |                 blocks
[INFO] [stderr] 88 | |             );
[INFO] [stderr]    | |______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/opts/flags/cflag.rs:96:60
[INFO] [stderr]    |
[INFO] [stderr] 96 |         for flag in s.split(',').map(str::trim).filter(|s| s.len() > 0) {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!s.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/opts/flags/iflag.rs:69:60
[INFO] [stderr]    |
[INFO] [stderr] 69 |         for flag in s.split(',').map(str::trim).filter(|s| s.len() > 0) {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!s.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/opts/flags/oflag.rs:60:60
[INFO] [stderr]    |
[INFO] [stderr] 60 |         for flag in s.split(',').map(str::trim).filter(|s| s.len() > 0) {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!s.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/opts/mod.rs:335:29
[INFO] [stderr]     |
[INFO] [stderr] 335 |     let mut split = s.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 4.18s
[INFO] running `"docker" "inspect" "bd5abc2b339d834ddf1a79da6a45920d503c05550a90e0e76b90ea9749a92b5a"`
[INFO] running `"docker" "rm" "-f" "bd5abc2b339d834ddf1a79da6a45920d503c05550a90e0e76b90ea9749a92b5a"`
[INFO] [stdout] bd5abc2b339d834ddf1a79da6a45920d503c05550a90e0e76b90ea9749a92b5a