[INFO] crate rust_swig 0.1.5 is already in cache
[INFO] extracting crate rust_swig 0.1.5 into work/ex/clippy-test-run/sources/stable/reg/rust_swig/0.1.5
[INFO] extracting crate rust_swig 0.1.5 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rust_swig/0.1.5
[INFO] validating manifest of rust_swig-0.1.5 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 rust_swig-0.1.5 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 rust_swig-0.1.5
[INFO] finished frobbing rust_swig-0.1.5
[INFO] frobbed toml for rust_swig-0.1.5 written to work/ex/clippy-test-run/sources/stable/reg/rust_swig/0.1.5/Cargo.toml
[INFO] started frobbing rust_swig-0.1.5
[INFO] finished frobbing rust_swig-0.1.5
[INFO] frobbed toml for rust_swig-0.1.5 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rust_swig/0.1.5/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 rust_swig-0.1.5 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/rust_swig/0.1.5:/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] bd45a9c62048bc5a60ae8cabc657b4529485acd5f2804ce2f5bc7676d23d101d
[INFO] running `"docker" "start" "-a" "bd45a9c62048bc5a60ae8cabc657b4529485acd5f2804ce2f5bc7676d23d101d"`
[INFO] [stderr]     Checking jni-sys v0.3.0
[INFO] [stderr]     Checking syntex_pos v0.58.1
[INFO] [stderr]    Compiling rust_swig v0.1.5 (/opt/crater/workdir)
[INFO] [stderr]     Checking syntex_errors v0.58.1
[INFO] [stderr]     Checking syntex_syntax v0.58.1
[INFO] [stderr]     Checking syntex v0.58.1
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/cpp/cpp_code.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 | /         write!(
[INFO] [stderr] 35 | |             file,
[INFO] [stderr] 36 | |             "{doc_comments}{item_name} = {index}{separator}\n",
[INFO] [stderr] 37 | |             item_name = item.name,
[INFO] [stderr] ...  |
[INFO] [stderr] 44 | |             },
[INFO] [stderr] 45 | |         ).map_err(&map_write_err)?;
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/cpp/cpp_code.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     write!(file, "}};\n").map_err(&map_write_err)?;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/cpp/cpp_code.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 | /         write!(
[INFO] [stderr] 158 | |             &mut cpp_fill_c_interface_struct,
[INFO] [stderr] 159 | |             "        ret.{method_name} = c_{method_name};\n",
[INFO] [stderr] 160 | |             method_name = method.name,
[INFO] [stderr] 161 | |         ).map_err(&map_write_err)?;
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]     --> src/cpp/mod.rs:1195:9
[INFO] [stderr]      |
[INFO] [stderr] 1195 | /         write!(
[INFO] [stderr] 1196 | |             &mut code,
[INFO] [stderr] 1197 | |             "{index} => {item_name},\n",
[INFO] [stderr] 1198 | |             index = i,
[INFO] [stderr] 1199 | |             item_name = item.rust_name
[INFO] [stderr] 1200 | |         ).unwrap();
[INFO] [stderr]      | |_________^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]     --> src/cpp/mod.rs:1224:9
[INFO] [stderr]      |
[INFO] [stderr] 1224 | /         write!(
[INFO] [stderr] 1225 | |             &mut code,
[INFO] [stderr] 1226 | |             "{index} => {item_name},\n",
[INFO] [stderr] 1227 | |             index = i,
[INFO] [stderr] 1228 | |             item_name = item.rust_name
[INFO] [stderr] 1229 | |         ).unwrap();
[INFO] [stderr]      | |_________^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/java_jni/java_code.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 | /         write!(
[INFO] [stderr] 45 | |             file,
[INFO] [stderr] 46 | |             "{doc_comments}{item_name}({index}){separator}\n",
[INFO] [stderr] 47 | |             item_name = item.name,
[INFO] [stderr] ...  |
[INFO] [stderr] 54 | |             },
[INFO] [stderr] 55 | |         ).map_err(&map_write_err)?;
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/java_jni/rust_code.rs:327:9
[INFO] [stderr]     |
[INFO] [stderr] 327 | /         write!(
[INFO] [stderr] 328 | |             &mut code,
[INFO] [stderr] 329 | |             "{index} => {item_name},\n",
[INFO] [stderr] 330 | |             index = i,
[INFO] [stderr] 331 | |             item_name = item.rust_name
[INFO] [stderr] 332 | |         ).unwrap();
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/cpp/cpp_code.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 | /         write!(
[INFO] [stderr] 35 | |             file,
[INFO] [stderr] 36 | |             "{doc_comments}{item_name} = {index}{separator}\n",
[INFO] [stderr] 37 | |             item_name = item.name,
[INFO] [stderr] ...  |
[INFO] [stderr] 44 | |             },
[INFO] [stderr] 45 | |         ).map_err(&map_write_err)?;
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/cpp/cpp_code.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     write!(file, "}};\n").map_err(&map_write_err)?;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/my_ast.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             ty: ty,
[INFO] [stderr]    |             ^^^^^^ help: replace it with: `ty`
[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: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/cpp/cpp_code.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 | /         write!(
[INFO] [stderr] 158 | |             &mut cpp_fill_c_interface_struct,
[INFO] [stderr] 159 | |             "        ret.{method_name} = c_{method_name};\n",
[INFO] [stderr] 160 | |             method_name = method.name,
[INFO] [stderr] 161 | |         ).map_err(&map_write_err)?;
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/my_ast.rs:576:17
[INFO] [stderr]     |
[INFO] [stderr] 576 |                 mutbl: mutbl,
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: replace it with: `mutbl`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parsing.rs:442:13
[INFO] [stderr]     |
[INFO] [stderr] 442 |             may_return_error: may_return_error,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `may_return_error`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parsing.rs:513:13
[INFO] [stderr]     |
[INFO] [stderr] 513 |             span: span,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `span`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/types_conv_map/utils.rs:111:29
[INFO] [stderr]     |
[INFO] [stderr] 111 |                             mutbl: mutbl,
[INFO] [stderr]     |                             ^^^^^^^^^^^^ help: replace it with: `mutbl`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/types_conv_map/utils.rs:122:29
[INFO] [stderr]     |
[INFO] [stderr] 122 |                             mutbl: mutbl,
[INFO] [stderr]     |                             ^^^^^^^^^^^^ help: replace it with: `mutbl`
[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] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/types_conv_map/mod.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |             write!(f, "\n")?;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]     --> src/cpp/mod.rs:1195:9
[INFO] [stderr]      |
[INFO] [stderr] 1195 | /         write!(
[INFO] [stderr] 1196 | |             &mut code,
[INFO] [stderr] 1197 | |             "{index} => {item_name},\n",
[INFO] [stderr] 1198 | |             index = i,
[INFO] [stderr] 1199 | |             item_name = item.rust_name
[INFO] [stderr] 1200 | |         ).unwrap();
[INFO] [stderr]      | |_________^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]     --> src/cpp/mod.rs:1224:9
[INFO] [stderr]      |
[INFO] [stderr] 1224 | /         write!(
[INFO] [stderr] 1225 | |             &mut code,
[INFO] [stderr] 1226 | |             "{index} => {item_name},\n",
[INFO] [stderr] 1227 | |             index = i,
[INFO] [stderr] 1228 | |             item_name = item.rust_name
[INFO] [stderr] 1229 | |         ).unwrap();
[INFO] [stderr]      | |_________^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/java_jni/java_code.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 | /         write!(
[INFO] [stderr] 45 | |             file,
[INFO] [stderr] 46 | |             "{doc_comments}{item_name}({index}){separator}\n",
[INFO] [stderr] 47 | |             item_name = item.name,
[INFO] [stderr] ...  |
[INFO] [stderr] 54 | |             },
[INFO] [stderr] 55 | |         ).map_err(&map_write_err)?;
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/java_jni/rust_code.rs:327:9
[INFO] [stderr]     |
[INFO] [stderr] 327 | /         write!(
[INFO] [stderr] 328 | |             &mut code,
[INFO] [stderr] 329 | |             "{index} => {item_name},\n",
[INFO] [stderr] 330 | |             index = i,
[INFO] [stderr] 331 | |             item_name = item.rust_name
[INFO] [stderr] 332 | |         ).unwrap();
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/my_ast.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             ty: ty,
[INFO] [stderr]    |             ^^^^^^ help: replace it with: `ty`
[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/my_ast.rs:576:17
[INFO] [stderr]     |
[INFO] [stderr] 576 |                 mutbl: mutbl,
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: replace it with: `mutbl`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parsing.rs:442:13
[INFO] [stderr]     |
[INFO] [stderr] 442 |             may_return_error: may_return_error,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `may_return_error`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parsing.rs:513:13
[INFO] [stderr]     |
[INFO] [stderr] 513 |             span: span,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `span`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/types_conv_map/utils.rs:111:29
[INFO] [stderr]     |
[INFO] [stderr] 111 |                             mutbl: mutbl,
[INFO] [stderr]     |                             ^^^^^^^^^^^^ help: replace it with: `mutbl`
[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] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/types_conv_map/utils.rs:122:29
[INFO] [stderr]     |
[INFO] [stderr] 122 |                             mutbl: mutbl,
[INFO] [stderr]     |                             ^^^^^^^^^^^^ help: replace it with: `mutbl`
[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] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/types_conv_map/mod.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |             write!(f, "\n")?;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/cpp/map_type.rs:369:30
[INFO] [stderr]     |
[INFO] [stderr] 369 |             input_converter: format!("{}", FROM_VAR_TEMPLATE),
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `FROM_VAR_TEMPLATE.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[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: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/cpp/map_type.rs:884:5
[INFO] [stderr]     |
[INFO] [stderr] 884 | /     let mut conv: &'static str = "";
[INFO] [stderr] 885 | |     if conv_map.is_this_exported_enum(opt_ty).is_some() {
[INFO] [stderr] 886 | |         conv = "static_cast<uint32_t>";
[INFO] [stderr] 887 | |     }
[INFO] [stderr]     | |_____^ help: it is more idiomatic to write: `let <mut> conv = if conv_map.is_this_exported_enum(opt_ty).is_some() { "static_cast<uint32_t>" } else { "" };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]     = note: you might not need `mut` at all
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/cpp/map_type.rs:964:31
[INFO] [stderr]     |
[INFO] [stderr] 964 |           if let Some(fclass) = conv_map
[INFO] [stderr]     |  _______________________________^
[INFO] [stderr] 965 | |             .find_foreigner_class_with_such_self_type(under_ref_ty, false)
[INFO] [stderr] 966 | |             .map(|v| v.clone())
[INFO] [stderr]     | |_______________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] help: Consider calling the dedicated `cloned` method
[INFO] [stderr]     |
[INFO] [stderr] 964 |         if let Some(fclass) = conv_map
[INFO] [stderr] 965 |             .find_foreigner_class_with_such_self_type(under_ref_ty, false).cloned()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/java_jni/rust_code.rs:849:19
[INFO] [stderr]     |
[INFO] [stderr] 849 |           let sig = JAVA_TYPE_NAMES_FOR_JNI_SIGNATURE
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 850 | |             .get(&*arg.as_ref().name.as_str())
[INFO] [stderr] 851 | |             .map(|v| *v)
[INFO] [stderr]     | |________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] help: Consider calling the dedicated `cloned` method
[INFO] [stderr]     |
[INFO] [stderr] 849 |         let sig = JAVA_TYPE_NAMES_FOR_JNI_SIGNATURE
[INFO] [stderr] 850 |             .get(&*arg.as_ref().name.as_str()).cloned()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: in an 'if' condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a 'let'
[INFO] [stderr]    --> src/my_ast.rs:115:67
[INFO] [stderr]     |
[INFO] [stderr] 115 |                   if trait_bounds.get(key).map_or(false, |requires| {
[INFO] [stderr]     |  ___________________________________________________________________^
[INFO] [stderr] 116 | |                     let val_name = Symbol::intern(&normalized_ty_string(val));
[INFO] [stderr] 117 | |                     others(val_name).map_or(true, |rt| !requires.is_subset(&rt.implements))
[INFO] [stderr] 118 | |                 }) {
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::block_in_if_condition_stmt)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#block_in_if_condition_stmt
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 32
[INFO] [stderr]    --> src/parsing.rs:176:1
[INFO] [stderr]     |
[INFO] [stderr] 176 | / pub(crate) fn parse_foreigner_class(
[INFO] [stderr] 177 | |     cx: &ExtCtxt,
[INFO] [stderr] 178 | |     config: &LanguageConfig,
[INFO] [stderr] 179 | |     tokens: &[TokenTree],
[INFO] [stderr] ...   |
[INFO] [stderr] 460 | |     })
[INFO] [stderr] 461 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/parsing.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 | /         let mut access = MethodAccess::Public;
[INFO] [stderr] 235 | |         if parser.eat_contextual_keyword(private_keyword) {
[INFO] [stderr] 236 | |             access = MethodAccess::Private;
[INFO] [stderr] 237 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let <mut> access = if parser.eat_contextual_keyword(private_keyword) { MethodAccess::Private } else { MethodAccess::Public };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: you might not need `mut` at all
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 26
[INFO] [stderr]    --> src/types_conv_map/parsing.rs:24:1
[INFO] [stderr]     |
[INFO] [stderr] 24  | / pub(in types_conv_map) fn parse_types_conv_map<'a>(
[INFO] [stderr] 25  | |     sess: &'a ParseSess,
[INFO] [stderr] 26  | |     name: &str,
[INFO] [stderr] 27  | |     code: &str,
[INFO] [stderr] ...   |
[INFO] [stderr] 375 | |     })
[INFO] [stderr] 376 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/types_conv_map/utils.rs:118:27
[INFO] [stderr]     |
[INFO] [stderr] 118 |                     span: self_type.span.clone(),
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self_type.span`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 26
[INFO] [stderr]    --> src/types_conv_map/mod.rs:233:5
[INFO] [stderr]     |
[INFO] [stderr] 233 | /     pub(crate) fn map_through_conversation_to_foreign(
[INFO] [stderr] 234 | |         &mut self,
[INFO] [stderr] 235 | |         rust_ty: &ast::Ty,
[INFO] [stderr] 236 | |         direction: petgraph::Direction,
[INFO] [stderr] ...   |
[INFO] [stderr] 378 | |         ret
[INFO] [stderr] 379 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:164:21
[INFO] [stderr]     |
[INFO] [stderr] 164 |     fn is_read_only(&self) -> bool {
[INFO] [stderr]     |                     ^^^^^ help: consider passing by value instead: `self`
[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: use of `unwrap_or` followed by a function call
[INFO] [stderr]    --> src/lib.rs:238:14
[INFO] [stderr]     |
[INFO] [stderr] 238 |             .unwrap_or(Symbol::intern(""))
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| Symbol::intern(""))`
[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: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]    --> src/lib.rs:584:13
[INFO] [stderr]     |
[INFO] [stderr] 584 |             Err(_) => {
[INFO] [stderr]     |             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]     = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/cpp/map_type.rs:369:30
[INFO] [stderr]     |
[INFO] [stderr] 369 |             input_converter: format!("{}", FROM_VAR_TEMPLATE),
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `FROM_VAR_TEMPLATE.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[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: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/cpp/map_type.rs:884:5
[INFO] [stderr]     |
[INFO] [stderr] 884 | /     let mut conv: &'static str = "";
[INFO] [stderr] 885 | |     if conv_map.is_this_exported_enum(opt_ty).is_some() {
[INFO] [stderr] 886 | |         conv = "static_cast<uint32_t>";
[INFO] [stderr] 887 | |     }
[INFO] [stderr]     | |_____^ help: it is more idiomatic to write: `let <mut> conv = if conv_map.is_this_exported_enum(opt_ty).is_some() { "static_cast<uint32_t>" } else { "" };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]     = note: you might not need `mut` at all
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/cpp/map_type.rs:964:31
[INFO] [stderr]     |
[INFO] [stderr] 964 |           if let Some(fclass) = conv_map
[INFO] [stderr]     |  _______________________________^
[INFO] [stderr] 965 | |             .find_foreigner_class_with_such_self_type(under_ref_ty, false)
[INFO] [stderr] 966 | |             .map(|v| v.clone())
[INFO] [stderr]     | |_______________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] help: Consider calling the dedicated `cloned` method
[INFO] [stderr]     |
[INFO] [stderr] 964 |         if let Some(fclass) = conv_map
[INFO] [stderr] 965 |             .find_foreigner_class_with_such_self_type(under_ref_ty, false).cloned()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/java_jni/rust_code.rs:849:19
[INFO] [stderr]     |
[INFO] [stderr] 849 |           let sig = JAVA_TYPE_NAMES_FOR_JNI_SIGNATURE
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 850 | |             .get(&*arg.as_ref().name.as_str())
[INFO] [stderr] 851 | |             .map(|v| *v)
[INFO] [stderr]     | |________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] help: Consider calling the dedicated `cloned` method
[INFO] [stderr]     |
[INFO] [stderr] 849 |         let sig = JAVA_TYPE_NAMES_FOR_JNI_SIGNATURE
[INFO] [stderr] 850 |             .get(&*arg.as_ref().name.as_str()).cloned()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: in an 'if' condition, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a 'let'
[INFO] [stderr]    --> src/my_ast.rs:115:67
[INFO] [stderr]     |
[INFO] [stderr] 115 |                   if trait_bounds.get(key).map_or(false, |requires| {
[INFO] [stderr]     |  ___________________________________________________________________^
[INFO] [stderr] 116 | |                     let val_name = Symbol::intern(&normalized_ty_string(val));
[INFO] [stderr] 117 | |                     others(val_name).map_or(true, |rt| !requires.is_subset(&rt.implements))
[INFO] [stderr] 118 | |                 }) {
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::block_in_if_condition_stmt)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#block_in_if_condition_stmt
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> /opt/crater/target/debug/build/rust_swig-e260bab197240c80/out/jni-include.rs:437:54
[INFO] [stderr]     |
[INFO] [stderr] 437 |                  ((since_unix_epoch.subsec_nanos() / 1000000) as u64)) as
[INFO] [stderr]     |                                                      ^^^^^^^ help: consider: `1_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 32
[INFO] [stderr]    --> src/parsing.rs:176:1
[INFO] [stderr]     |
[INFO] [stderr] 176 | / pub(crate) fn parse_foreigner_class(
[INFO] [stderr] 177 | |     cx: &ExtCtxt,
[INFO] [stderr] 178 | |     config: &LanguageConfig,
[INFO] [stderr] 179 | |     tokens: &[TokenTree],
[INFO] [stderr] ...   |
[INFO] [stderr] 460 | |     })
[INFO] [stderr] 461 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/parsing.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 | /         let mut access = MethodAccess::Public;
[INFO] [stderr] 235 | |         if parser.eat_contextual_keyword(private_keyword) {
[INFO] [stderr] 236 | |             access = MethodAccess::Private;
[INFO] [stderr] 237 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let <mut> access = if parser.eat_contextual_keyword(private_keyword) { MethodAccess::Private } else { MethodAccess::Public };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: you might not need `mut` at all
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to i16 may become silently lossy if types change
[INFO] [stderr]    --> /opt/crater/target/debug/build/rust_swig-e260bab197240c80/out/jni-include.rs:338:31
[INFO] [stderr]     |
[INFO] [stderr] 338 |         if self < 0 || self > (::std::u8::MAX as jshort) {
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `i16::from(::std::u8::MAX)`
[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: casting u16 to i32 may become silently lossy if types change
[INFO] [stderr]    --> /opt/crater/target/debug/build/rust_swig-e260bab197240c80/out/jni-include.rs:356:31
[INFO] [stderr]     |
[INFO] [stderr] 356 |         if self < 0 || self > (::std::u16::MAX as jint) {
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `i32::from(::std::u16::MAX)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to i64 may become silently lossy if types change
[INFO] [stderr]    --> /opt/crater/target/debug/build/rust_swig-e260bab197240c80/out/jni-include.rs:374:31
[INFO] [stderr]     |
[INFO] [stderr] 374 |         if self < 0 || self > (::std::u32::MAX as jlong) {
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `i64::from(::std::u32::MAX)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]    --> /opt/crater/target/debug/build/rust_swig-e260bab197240c80/out/jni-include.rs:437:18
[INFO] [stderr]     |
[INFO] [stderr] 437 |                  ((since_unix_epoch.subsec_nanos() / 1000000) as u64)) as
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(since_unix_epoch.subsec_nanos() / 1000000)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: Calling `subsec_millis()` is more concise than this calculation
[INFO] [stderr]    --> /opt/crater/target/debug/build/rust_swig-e260bab197240c80/out/jni-include.rs:437:19
[INFO] [stderr]     |
[INFO] [stderr] 437 |                  ((since_unix_epoch.subsec_nanos() / 1000000) as u64)) as
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `since_unix_epoch.subsec_millis()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::duration_subsec)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#duration_subsec
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 26
[INFO] [stderr]    --> src/types_conv_map/parsing.rs:24:1
[INFO] [stderr]     |
[INFO] [stderr] 24  | / pub(in types_conv_map) fn parse_types_conv_map<'a>(
[INFO] [stderr] 25  | |     sess: &'a ParseSess,
[INFO] [stderr] 26  | |     name: &str,
[INFO] [stderr] 27  | |     code: &str,
[INFO] [stderr] ...   |
[INFO] [stderr] 375 | |     })
[INFO] [stderr] 376 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/types_conv_map/utils.rs:118:27
[INFO] [stderr]     |
[INFO] [stderr] 118 |                     span: self_type.span.clone(),
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self_type.span`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 26
[INFO] [stderr]    --> src/types_conv_map/mod.rs:233:5
[INFO] [stderr]     |
[INFO] [stderr] 233 | /     pub(crate) fn map_through_conversation_to_foreign(
[INFO] [stderr] 234 | |         &mut self,
[INFO] [stderr] 235 | |         rust_ty: &ast::Ty,
[INFO] [stderr] 236 | |         direction: petgraph::Direction,
[INFO] [stderr] ...   |
[INFO] [stderr] 378 | |         ret
[INFO] [stderr] 379 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:164:21
[INFO] [stderr]     |
[INFO] [stderr] 164 |     fn is_read_only(&self) -> bool {
[INFO] [stderr]     |                     ^^^^^ help: consider passing by value instead: `self`
[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: use of `unwrap_or` followed by a function call
[INFO] [stderr]    --> src/lib.rs:238:14
[INFO] [stderr]     |
[INFO] [stderr] 238 |             .unwrap_or(Symbol::intern(""))
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| Symbol::intern(""))`
[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: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]    --> src/lib.rs:584:13
[INFO] [stderr]     |
[INFO] [stderr] 584 |             Err(_) => {
[INFO] [stderr]     |             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]     = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.45s
[INFO] running `"docker" "inspect" "bd45a9c62048bc5a60ae8cabc657b4529485acd5f2804ce2f5bc7676d23d101d"`
[INFO] running `"docker" "rm" "-f" "bd45a9c62048bc5a60ae8cabc657b4529485acd5f2804ce2f5bc7676d23d101d"`
[INFO] [stdout] bd45a9c62048bc5a60ae8cabc657b4529485acd5f2804ce2f5bc7676d23d101d