[INFO] crate merkle_tree 0.1.0 is already in cache
[INFO] extracting crate merkle_tree 0.1.0 into work/ex/clippy-test-run/sources/stable/reg/merkle_tree/0.1.0
[INFO] extracting crate merkle_tree 0.1.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/merkle_tree/0.1.0
[INFO] validating manifest of merkle_tree-0.1.0 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 merkle_tree-0.1.0 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 merkle_tree-0.1.0
[INFO] finished frobbing merkle_tree-0.1.0
[INFO] frobbed toml for merkle_tree-0.1.0 written to work/ex/clippy-test-run/sources/stable/reg/merkle_tree/0.1.0/Cargo.toml
[INFO] started frobbing merkle_tree-0.1.0
[INFO] finished frobbing merkle_tree-0.1.0
[INFO] frobbed toml for merkle_tree-0.1.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/merkle_tree/0.1.0/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 merkle_tree-0.1.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/merkle_tree/0.1.0:/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] 5c8af341dc80c2b0ad1a4c7a3899041f91769dddcade9c4f51ea811ed1cdf466
[INFO] running `"docker" "start" "-a" "5c8af341dc80c2b0ad1a4c7a3899041f91769dddcade9c4f51ea811ed1cdf466"`
[INFO] [stderr]     Checking rayon v0.7.1
[INFO] [stderr]     Checking merkle_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: redundant field names in struct initialization
[INFO] [stderr]   --> src/merkle_tree.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             layers: layers,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: replace it with: `layers`
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:1:9
[INFO] [stderr]    |
[INFO] [stderr] 1  | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: #[deny(clippy::redundant_field_names)] implied by #[deny(warnings)]
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] error: redundant field names in struct initialization
[INFO] [stderr]    --> src/merkle_tree.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |             layers: layers,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `layers`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] error: redundant field names in struct initialization
[INFO] [stderr]    --> src/merkle_tree.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |             format: format,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `format`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] error: redundant field names in struct initialization
[INFO] [stderr]   --> src/merkle_tree.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             layers: layers,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: replace it with: `layers`
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:1:9
[INFO] [stderr]    |
[INFO] [stderr] 1  | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: #[deny(clippy::redundant_field_names)] implied by #[deny(warnings)]
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] error: redundant field names in struct initialization
[INFO] [stderr]    --> src/merkle_tree.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |             layers: layers,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `layers`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] error: redundant field names in struct initialization
[INFO] [stderr]    --> src/merkle_tree.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |             format: format,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: replace it with: `format`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] error: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/merkle_tree.rs:166:12
[INFO] [stderr]     |
[INFO] [stderr] 166 |         if layers_last_index >= current_layer_index + 1 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:1:9
[INFO] [stderr]     |
[INFO] [stderr] 1   | #![deny(warnings)]
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     = note: #[deny(clippy::int_plus_one)] implied by #[deny(warnings)]
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 166 |         if layers_last_index > current_layer_index {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/merkle_tree.rs:207:20
[INFO] [stderr]     |
[INFO] [stderr] 207 |               } else {
[INFO] [stderr]     |  ____________________^
[INFO] [stderr] 208 | |                 if self.layers[layer_index].len() % 2 == 1 {
[INFO] [stderr] 209 | |                     let last_node_index = self.layers[layer_index].len() - 1;
[INFO] [stderr] 210 | |                     let last_node = self.layers[layer_index][last_node_index];
[INFO] [stderr] ...   |
[INFO] [stderr] 231 | |                 }
[INFO] [stderr] 232 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:1:9
[INFO] [stderr]     |
[INFO] [stderr] 1   | #![deny(warnings)]
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     = note: #[deny(clippy::collapsible_if)] implied by #[deny(warnings)]
[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] 207 |             } else if self.layers[layer_index].len() % 2 == 1 {
[INFO] [stderr] 208 |     let last_node_index = self.layers[layer_index].len() - 1;
[INFO] [stderr] 209 |     let last_node = self.layers[layer_index][last_node_index];
[INFO] [stderr] 210 |     let new_node = hash_leaf(&last_node);
[INFO] [stderr] 211 |     self.layers[layer_index + 1].push(new_node);
[INFO] [stderr] 212 |     self.recursive_repair_branch(layer_index + 1);
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] error: unneeded return statement
[INFO] [stderr]    --> src/merkle_tree.rs:268:17
[INFO] [stderr]     |
[INFO] [stderr] 268 |                 return Ok(vec![root_hash]);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(vec![root_hash])`
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:1:9
[INFO] [stderr]     |
[INFO] [stderr] 1   | #![deny(warnings)]
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     = note: #[deny(clippy::needless_return)] implied by #[deny(warnings)]
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] error: unneeded return statement
[INFO] [stderr]    --> src/merkle_tree.rs:270:17
[INFO] [stderr]     |
[INFO] [stderr] 270 |                 return Err("Tree invalidate.");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err("Tree invalidate.")`
[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: unneeded return statement
[INFO] [stderr]    --> src/merkle_tree.rs:317:17
[INFO] [stderr]     |
[INFO] [stderr] 317 |                 return Err("Tree invalidate.");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err("Tree invalidate.")`
[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: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `merkle_tree`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/merkle_tree.rs:166:12
[INFO] [stderr]     |
[INFO] [stderr] 166 |         if layers_last_index >= current_layer_index + 1 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:1:9
[INFO] [stderr]     |
[INFO] [stderr] 1   | #![deny(warnings)]
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     = note: #[deny(clippy::int_plus_one)] implied by #[deny(warnings)]
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 166 |         if layers_last_index > current_layer_index {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/merkle_tree.rs:207:20
[INFO] [stderr]     |
[INFO] [stderr] 207 |               } else {
[INFO] [stderr]     |  ____________________^
[INFO] [stderr] 208 | |                 if self.layers[layer_index].len() % 2 == 1 {
[INFO] [stderr] 209 | |                     let last_node_index = self.layers[layer_index].len() - 1;
[INFO] [stderr] 210 | |                     let last_node = self.layers[layer_index][last_node_index];
[INFO] [stderr] ...   |
[INFO] [stderr] 231 | |                 }
[INFO] [stderr] 232 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:1:9
[INFO] [stderr]     |
[INFO] [stderr] 1   | #![deny(warnings)]
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     = note: #[deny(clippy::collapsible_if)] implied by #[deny(warnings)]
[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] 207 |             } else if self.layers[layer_index].len() % 2 == 1 {
[INFO] [stderr] 208 |     let last_node_index = self.layers[layer_index].len() - 1;
[INFO] [stderr] 209 |     let last_node = self.layers[layer_index][last_node_index];
[INFO] [stderr] 210 |     let new_node = hash_leaf(&last_node);
[INFO] [stderr] 211 |     self.layers[layer_index + 1].push(new_node);
[INFO] [stderr] 212 |     self.recursive_repair_branch(layer_index + 1);
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] error: unneeded return statement
[INFO] [stderr]    --> src/merkle_tree.rs:268:17
[INFO] [stderr]     |
[INFO] [stderr] 268 |                 return Ok(vec![root_hash]);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(vec![root_hash])`
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:1:9
[INFO] [stderr]     |
[INFO] [stderr] 1   | #![deny(warnings)]
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     = note: #[deny(clippy::needless_return)] implied by #[deny(warnings)]
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] error: unneeded return statement
[INFO] [stderr]    --> src/merkle_tree.rs:270:17
[INFO] [stderr]     |
[INFO] [stderr] 270 |                 return Err("Tree invalidate.");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err("Tree invalidate.")`
[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: unneeded return statement
[INFO] [stderr]    --> src/merkle_tree.rs:317:17
[INFO] [stderr]     |
[INFO] [stderr] 317 |                 return Err("Tree invalidate.");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err("Tree invalidate.")`
[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: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `merkle_tree`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5c8af341dc80c2b0ad1a4c7a3899041f91769dddcade9c4f51ea811ed1cdf466"`
[INFO] running `"docker" "rm" "-f" "5c8af341dc80c2b0ad1a4c7a3899041f91769dddcade9c4f51ea811ed1cdf466"`
[INFO] [stdout] 5c8af341dc80c2b0ad1a4c7a3899041f91769dddcade9c4f51ea811ed1cdf466