[INFO] crate huffman-coding 0.1.2 is already in cache
[INFO] extracting crate huffman-coding 0.1.2 into work/ex/clippy-test-run/sources/stable/reg/huffman-coding/0.1.2
[INFO] extracting crate huffman-coding 0.1.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/huffman-coding/0.1.2
[INFO] validating manifest of huffman-coding-0.1.2 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 huffman-coding-0.1.2 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 huffman-coding-0.1.2
[INFO] finished frobbing huffman-coding-0.1.2
[INFO] frobbed toml for huffman-coding-0.1.2 written to work/ex/clippy-test-run/sources/stable/reg/huffman-coding/0.1.2/Cargo.toml
[INFO] started frobbing huffman-coding-0.1.2
[INFO] finished frobbing huffman-coding-0.1.2
[INFO] frobbed toml for huffman-coding-0.1.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/huffman-coding/0.1.2/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 huffman-coding-0.1.2 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-6/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/reg/huffman-coding/0.1.2:/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] 4b90e1684f34dc61181ef74ff7a955a7e655abdccd8d46d431ee7da9e8759f87
[INFO] running `"docker" "start" "-a" "4b90e1684f34dc61181ef74ff7a955a7e655abdccd8d46d431ee7da9e8759f87"`
[INFO] [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other binary targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a binary target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/src/bin/util.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a binary target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autobins = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]     Checking bitstream-rs v0.1.2
[INFO] [stderr]     Checking huffman-coding v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:299:13
[INFO] [stderr]     |
[INFO] [stderr] 299 |             tree: tree,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `tree`
[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/lib.rs:299:13
[INFO] [stderr]     |
[INFO] [stderr] 299 |             tree: tree,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `tree`
[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: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lib.rs:326:20
[INFO] [stderr]     |
[INFO] [stderr] 326 |               } else {
[INFO] [stderr]     |  ____________________^
[INFO] [stderr] 327 | |                 if &self.tree != state {
[INFO] [stderr] 328 | |                     return Err(IOError::from(IOErrorKind::InvalidData))
[INFO] [stderr] 329 | |                 } else {
[INFO] [stderr] 330 | |                     break;
[INFO] [stderr] 331 | |                 }
[INFO] [stderr] 332 | |             }
[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] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/lib.rs:326:20
[INFO] [stderr]     |
[INFO] [stderr] 326 |               } else {
[INFO] [stderr]     |  ____________________^
[INFO] [stderr] 327 | |                 if &self.tree != state {
[INFO] [stderr] 328 | |                     return Err(IOError::from(IOErrorKind::InvalidData))
[INFO] [stderr] 329 | |                 } else {
[INFO] [stderr] 330 | |                     break;
[INFO] [stderr] 331 | |                 }
[INFO] [stderr] 332 | |             }
[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] 326 |             } else if &self.tree != state {
[INFO] [stderr] 327 |     return Err(IOError::from(IOErrorKind::InvalidData))
[INFO] [stderr] 328 | } else {
[INFO] [stderr] 329 |     break;
[INFO] [stderr] 330 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/lib.rs:334:12
[INFO] [stderr]     |
[INFO] [stderr] 334 |         Ok((pos))
[INFO] [stderr]     |            ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: Consider removing unnecessary double parentheses
[INFO] [stderr]    --> src/lib.rs:334:12
[INFO] [stderr]     |
[INFO] [stderr] 334 |         Ok((pos))
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::double_parens)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#double_parens
[INFO] [stderr] 
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 326 |             } else if &self.tree != state {
[INFO] [stderr] 327 |     return Err(IOError::from(IOErrorKind::InvalidData))
[INFO] [stderr] 328 | } else {
[INFO] [stderr] 329 |     break;
[INFO] [stderr] 330 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/lib.rs:334:12
[INFO] [stderr]     |
[INFO] [stderr] 334 |         Ok((pos))
[INFO] [stderr]     |            ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: Consider removing unnecessary double parentheses
[INFO] [stderr]    --> src/lib.rs:334:12
[INFO] [stderr]     |
[INFO] [stderr] 334 |         Ok((pos))
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::double_parens)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#double_parens
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `table`
[INFO] [stderr]    --> src/lib.rs:161:18
[INFO] [stderr]     |
[INFO] [stderr] 161 |         for i in 0..256 {
[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] 161 |         for (i, <item>) in table.iter_mut().enumerate() {
[INFO] [stderr]     |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:173:9
[INFO] [stderr]     |
[INFO] [stderr] 173 | /         match self {
[INFO] [stderr] 174 | |             &HuffmanTree::Leaf(item, prob) if item == byte => Some(prob),
[INFO] [stderr] 175 | |             &HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr] 176 | |                 zero.get_byte_prob(byte).or(one.get_byte_prob(byte))
[INFO] [stderr] 177 | |             },
[INFO] [stderr] 178 | |             _ => None
[INFO] [stderr] 179 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 173 |         match *self {
[INFO] [stderr] 174 |             HuffmanTree::Leaf(item, prob) if item == byte => Some(prob),
[INFO] [stderr] 175 |             HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or` followed by a function call
[INFO] [stderr]    --> src/lib.rs:176:42
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 zero.get_byte_prob(byte).or(one.get_byte_prob(byte))
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_else(|| one.get_byte_prob(byte))`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:194:9
[INFO] [stderr]     |
[INFO] [stderr] 194 | /         match self {
[INFO] [stderr] 195 | |             &HuffmanTree::Leaf(_, prob) => prob as u16,
[INFO] [stderr] 196 | |             &HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr] 197 | |                 zero.get_probability() + one.get_probability()
[INFO] [stderr] 198 | |             }
[INFO] [stderr] 199 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 194 |         match *self {
[INFO] [stderr] 195 |             HuffmanTree::Leaf(_, prob) => prob as u16,
[INFO] [stderr] 196 |             HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:195:44
[INFO] [stderr]     |
[INFO] [stderr] 195 |             &HuffmanTree::Leaf(_, prob) => prob as u16,
[INFO] [stderr]     |                                            ^^^^^^^^^^^ help: try: `u16::from(prob)`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:209:9
[INFO] [stderr]     |
[INFO] [stderr] 209 | /         match self {
[INFO] [stderr] 210 | |             &HuffmanTree::Leaf(ref elem, _) => {
[INFO] [stderr] 211 | |                 data.insert(*elem, prev);
[INFO] [stderr] 212 | |             },
[INFO] [stderr] ...   |
[INFO] [stderr] 220 | |             }
[INFO] [stderr] 221 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 209 |         match *self {
[INFO] [stderr] 210 |             HuffmanTree::Leaf(ref elem, _) => {
[INFO] [stderr] 211 |                 data.insert(*elem, prev);
[INFO] [stderr] 212 |             },
[INFO] [stderr] 213 |             HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/lib.rs:260:45
[INFO] [stderr]     |
[INFO] [stderr] 260 |             let bits = self.table.get(item).ok_or(IOError::from(IOErrorKind::InvalidData))?;
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| IOError::from(IOErrorKind::InvalidData))`
[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] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:311:17
[INFO] [stderr]     |
[INFO] [stderr] 311 | /                 match state {
[INFO] [stderr] 312 | |                     &HuffmanTree::Leaf(x, _) => {
[INFO] [stderr] 313 | |                         buf[pos] = x;
[INFO] [stderr] 314 | |                         pos += 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 324 | |                     }
[INFO] [stderr] 325 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 311 |                 match *state {
[INFO] [stderr] 312 |                     HuffmanTree::Leaf(x, _) => {
[INFO] [stderr] 313 |                         buf[pos] = x;
[INFO] [stderr] 314 |                         pos += 1;
[INFO] [stderr] 315 |                         state = &self.tree;
[INFO] [stderr] 316 |                     },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:319:25
[INFO] [stderr]     |
[INFO] [stderr] 319 | /                         if let &HuffmanTree::Leaf(x, _) = state {
[INFO] [stderr] 320 | |                             buf[pos] = x;
[INFO] [stderr] 321 | |                             pos += 1;
[INFO] [stderr] 322 | |                             state = &self.tree;
[INFO] [stderr] 323 | |                         }
[INFO] [stderr]     | |_________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 319 |                         if let HuffmanTree::Leaf(x, _) = *state {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `table`
[INFO] [stderr]    --> src/lib.rs:161:18
[INFO] [stderr]     |
[INFO] [stderr] 161 |         for i in 0..256 {
[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] 161 |         for (i, <item>) in table.iter_mut().enumerate() {
[INFO] [stderr]     |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:173:9
[INFO] [stderr]     |
[INFO] [stderr] 173 | /         match self {
[INFO] [stderr] 174 | |             &HuffmanTree::Leaf(item, prob) if item == byte => Some(prob),
[INFO] [stderr] 175 | |             &HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr] 176 | |                 zero.get_byte_prob(byte).or(one.get_byte_prob(byte))
[INFO] [stderr] 177 | |             },
[INFO] [stderr] 178 | |             _ => None
[INFO] [stderr] 179 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 173 |         match *self {
[INFO] [stderr] 174 |             HuffmanTree::Leaf(item, prob) if item == byte => Some(prob),
[INFO] [stderr] 175 |             HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or` followed by a function call
[INFO] [stderr]    --> src/lib.rs:176:42
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 zero.get_byte_prob(byte).or(one.get_byte_prob(byte))
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_else(|| one.get_byte_prob(byte))`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:194:9
[INFO] [stderr]     |
[INFO] [stderr] 194 | /         match self {
[INFO] [stderr] 195 | |             &HuffmanTree::Leaf(_, prob) => prob as u16,
[INFO] [stderr] 196 | |             &HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr] 197 | |                 zero.get_probability() + one.get_probability()
[INFO] [stderr] 198 | |             }
[INFO] [stderr] 199 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 194 |         match *self {
[INFO] [stderr] 195 |             HuffmanTree::Leaf(_, prob) => prob as u16,
[INFO] [stderr] 196 |             HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u16 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:195:44
[INFO] [stderr]     |
[INFO] [stderr] 195 |             &HuffmanTree::Leaf(_, prob) => prob as u16,
[INFO] [stderr]     |                                            ^^^^^^^^^^^ help: try: `u16::from(prob)`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:209:9
[INFO] [stderr]     |
[INFO] [stderr] 209 | /         match self {
[INFO] [stderr] 210 | |             &HuffmanTree::Leaf(ref elem, _) => {
[INFO] [stderr] 211 | |                 data.insert(*elem, prev);
[INFO] [stderr] 212 | |             },
[INFO] [stderr] ...   |
[INFO] [stderr] 220 | |             }
[INFO] [stderr] 221 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 209 |         match *self {
[INFO] [stderr] 210 |             HuffmanTree::Leaf(ref elem, _) => {
[INFO] [stderr] 211 |                 data.insert(*elem, prev);
[INFO] [stderr] 212 |             },
[INFO] [stderr] 213 |             HuffmanTree::Node(ref zero, ref one) => {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/lib.rs:260:45
[INFO] [stderr]     |
[INFO] [stderr] 260 |             let bits = self.table.get(item).ok_or(IOError::from(IOErrorKind::InvalidData))?;
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| IOError::from(IOErrorKind::InvalidData))`
[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] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:311:17
[INFO] [stderr]     |
[INFO] [stderr] 311 | /                 match state {
[INFO] [stderr] 312 | |                     &HuffmanTree::Leaf(x, _) => {
[INFO] [stderr] 313 | |                         buf[pos] = x;
[INFO] [stderr] 314 | |                         pos += 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 324 | |                     }
[INFO] [stderr] 325 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 311 |                 match *state {
[INFO] [stderr] 312 |                     HuffmanTree::Leaf(x, _) => {
[INFO] [stderr] 313 |                         buf[pos] = x;
[INFO] [stderr] 314 |                         pos += 1;
[INFO] [stderr] 315 |                         state = &self.tree;
[INFO] [stderr] 316 |                     },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:319:25
[INFO] [stderr]     |
[INFO] [stderr] 319 | /                         if let &HuffmanTree::Leaf(x, _) = state {
[INFO] [stderr] 320 | |                             buf[pos] = x;
[INFO] [stderr] 321 | |                             pos += 1;
[INFO] [stderr] 322 | |                             state = &self.tree;
[INFO] [stderr] 323 | |                         }
[INFO] [stderr]     | |_________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 319 |                         if let HuffmanTree::Leaf(x, _) = *state {
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^^   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.47s
[INFO] running `"docker" "inspect" "4b90e1684f34dc61181ef74ff7a955a7e655abdccd8d46d431ee7da9e8759f87"`
[INFO] running `"docker" "rm" "-f" "4b90e1684f34dc61181ef74ff7a955a7e655abdccd8d46d431ee7da9e8759f87"`
[INFO] [stdout] 4b90e1684f34dc61181ef74ff7a955a7e655abdccd8d46d431ee7da9e8759f87