[INFO] updating cached repository https://github.com/volution/volution-md5-tools
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2065e7b38f57135af7fc5358fae0dbd22de4376c
[INFO] checking volution/volution-md5-tools against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvolution%2Fvolution-md5-tools" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/volution/volution-md5-tools on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/volution/volution-md5-tools
[INFO] finished tweaking git repo https://github.com/volution/volution-md5-tools
[INFO] tweaked toml for git repo https://github.com/volution/volution-md5-tools written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/volution/volution-md5-tools already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] af9ba189b0ce68c38e3bfe4138eaf8e2662a1a97317aef352ad0131d457d5123
[INFO] running `"docker" "start" "-a" "af9ba189b0ce68c38e3bfe4138eaf8e2662a1a97317aef352ad0131d457d5123"`
[INFO] [stderr]     Checking cpio v0.2.0
[INFO] [stderr]     Checking typenum v1.11.2
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking indicatif v0.12.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking crossbeam v0.7.2
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]     Checking md-5 v0.8.0
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]     Checking md5-tools v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/digests.rs:16:107
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn digest <Input : io::Read> (_hash : &HashAlgorithm, _input : &mut Input, _output : &mut Vec<u8>) -> (io::Result<()>) {
[INFO] [stderr]    |                                                                                                           ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/digests.rs:42:120
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub fn digest_0 <Hash : digest::Digest + io::Write, Input : io::Read> (_input : &mut Input, _output : &mut Vec<u8>) -> (io::Result<()>) {
[INFO] [stderr]    |                                                                                                                        ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:10:75
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn handle (&mut self, _path : & PathValueRef, _hash : & HashBytesRef) -> (Result<(), io::Error>);
[INFO] [stderr]    |                                                                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:11:26
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn flush (&mut self) -> (Result<(), io::Error>);
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:28:49
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn new (_stream : Stream, _zero : bool) -> (Self) {
[INFO] [stderr]    |                                                    ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:40:24
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn done (self) -> (Result<Stream, io::Error>) {
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:49:75
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn handle (&mut self, _path : & PathValueRef, _hash : & HashBytesRef) -> (Result<(), io::Error>) {
[INFO] [stderr]    |                                                                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:63:26
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn flush (&mut self) -> (Result<(), io::Error>) {
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/main_create.rs:20:19
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn main () -> (Result<(), io::Error>) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_create.rs:783:119
[INFO] [stderr]     |
[INFO] [stderr] 783 | fn entry_order (_entry : & walkdir::DirEntry, _metadata : & fs::Metadata, _index : u64, _kind : DirEntryOrderKind) -> (DirEntryOrder) {
[INFO] [stderr]     |                                                                                                                       ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_create.rs:799:101
[INFO] [stderr]     |
[INFO] [stderr] 799 | fn entry_order_by_inode (_entry : & walkdir::DirEntry, _metadata : & fs::Metadata, _index : u64) -> (DirEntryOrder) {
[INFO] [stderr]     |                                                                                                     ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_create.rs:819:100
[INFO] [stderr]     |
[INFO] [stderr] 819 | fn entry_order_by_hash (_entry : & walkdir::DirEntry, _metadata : & fs::Metadata, _index : u64) -> (DirEntryOrder) {
[INFO] [stderr]     |                                                                                                    ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_create.rs:833:102
[INFO] [stderr]     |
[INFO] [stderr] 833 | fn entry_order_by_extent (_entry : & walkdir::DirEntry, _metadata : & fs::Metadata, _index : u64) -> (DirEntryOrder) {
[INFO] [stderr]     |                                                                                                      ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/main_diff.rs:92:19
[INFO] [stderr]    |
[INFO] [stderr] 92 | pub fn main () -> (Result<(), io::Error>) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:302:144
[INFO] [stderr]     |
[INFO] [stderr] 302 | fn load (_path : & path::Path, _tokens : &mut Tokens, _pattern : & regex::bytes::Regex, _zero : bool, _decompressor : CompressionAlgorithm) -> (Result<Source, io::Error>) {
[INFO] [stderr]     |                                                                                                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:378:161
[INFO] [stderr]     |
[INFO] [stderr] 378 | fn load_from_stream <Stream : io::Read> (_stream : &mut Stream, _path : & path::Path, _tokens : &mut Tokens, _pattern : & regex::bytes::Regex, _zero : bool) -> (Result<Source, io::Error>) {
[INFO] [stderr]     |                                                                                                                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:531:143
[INFO] [stderr]     |
[INFO] [stderr] 531 | fn diff (_source_left : & Source, _index_left : & SourceIndex, _source_right : & Source, _index_right : & SourceIndex, _tokens : & Tokens) -> (Diff) {
[INFO] [stderr]     |                                                                                                                                               ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:664:83
[INFO] [stderr]     |
[INFO] [stderr] 664 |     fn new (_hash_for_empty : & HashValueRef, _hash_for_invalid : & HashValueRef) -> (Self) {
[INFO] [stderr]     |                                                                                      ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:681:57
[INFO] [stderr]     |
[INFO] [stderr] 681 |     fn include_hash (&mut self, _token : &HashValueRef) -> (HashKey) {
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:694:57
[INFO] [stderr]     |
[INFO] [stderr] 694 |     fn include_path (&mut self, _token : &PathValueRef) -> (HashKey) {
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:707:45
[INFO] [stderr]     |
[INFO] [stderr] 707 |     fn select_hash (& self, _key : HashKey) -> (&HashValueRef) {
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:711:45
[INFO] [stderr]     |
[INFO] [stderr] 711 |     fn select_path (& self, _key : PathKey) -> (&PathValueRef) {
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:715:47
[INFO] [stderr]     |
[INFO] [stderr] 715 |     fn order_of_hash (& self, _key : HashKey) -> (TokenOrder) {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:719:47
[INFO] [stderr]     |
[INFO] [stderr] 719 |     fn order_of_path (& self, _key : PathKey) -> (TokenOrder) {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/main_cpio.rs:16:19
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn main () -> (Result<(), io::Error>) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/digests.rs:16:107
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn digest <Input : io::Read> (_hash : &HashAlgorithm, _input : &mut Input, _output : &mut Vec<u8>) -> (io::Result<()>) {
[INFO] [stderr]    |                                                                                                           ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/digests.rs:42:120
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub fn digest_0 <Hash : digest::Digest + io::Write, Input : io::Read> (_input : &mut Input, _output : &mut Vec<u8>) -> (io::Result<()>) {
[INFO] [stderr]    |                                                                                                                        ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:10:75
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn handle (&mut self, _path : & PathValueRef, _hash : & HashBytesRef) -> (Result<(), io::Error>);
[INFO] [stderr]    |                                                                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:11:26
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn flush (&mut self) -> (Result<(), io::Error>);
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:28:49
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn new (_stream : Stream, _zero : bool) -> (Self) {
[INFO] [stderr]    |                                                    ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:40:24
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn done (self) -> (Result<Stream, io::Error>) {
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:49:75
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn handle (&mut self, _path : & PathValueRef, _hash : & HashBytesRef) -> (Result<(), io::Error>) {
[INFO] [stderr]    |                                                                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/sinks.rs:63:26
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn flush (&mut self) -> (Result<(), io::Error>) {
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/main_create.rs:20:19
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn main () -> (Result<(), io::Error>) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_create.rs:783:119
[INFO] [stderr]     |
[INFO] [stderr] 783 | fn entry_order (_entry : & walkdir::DirEntry, _metadata : & fs::Metadata, _index : u64, _kind : DirEntryOrderKind) -> (DirEntryOrder) {
[INFO] [stderr]     |                                                                                                                       ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_create.rs:799:101
[INFO] [stderr]     |
[INFO] [stderr] 799 | fn entry_order_by_inode (_entry : & walkdir::DirEntry, _metadata : & fs::Metadata, _index : u64) -> (DirEntryOrder) {
[INFO] [stderr]     |                                                                                                     ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_create.rs:819:100
[INFO] [stderr]     |
[INFO] [stderr] 819 | fn entry_order_by_hash (_entry : & walkdir::DirEntry, _metadata : & fs::Metadata, _index : u64) -> (DirEntryOrder) {
[INFO] [stderr]     |                                                                                                    ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_create.rs:833:102
[INFO] [stderr]     |
[INFO] [stderr] 833 | fn entry_order_by_extent (_entry : & walkdir::DirEntry, _metadata : & fs::Metadata, _index : u64) -> (DirEntryOrder) {
[INFO] [stderr]     |                                                                                                      ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/main_diff.rs:92:19
[INFO] [stderr]    |
[INFO] [stderr] 92 | pub fn main () -> (Result<(), io::Error>) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:302:144
[INFO] [stderr]     |
[INFO] [stderr] 302 | fn load (_path : & path::Path, _tokens : &mut Tokens, _pattern : & regex::bytes::Regex, _zero : bool, _decompressor : CompressionAlgorithm) -> (Result<Source, io::Error>) {
[INFO] [stderr]     |                                                                                                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:378:161
[INFO] [stderr]     |
[INFO] [stderr] 378 | fn load_from_stream <Stream : io::Read> (_stream : &mut Stream, _path : & path::Path, _tokens : &mut Tokens, _pattern : & regex::bytes::Regex, _zero : bool) -> (Result<Source, io::Error>) {
[INFO] [stderr]     |                                                                                                                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:531:143
[INFO] [stderr]     |
[INFO] [stderr] 531 | fn diff (_source_left : & Source, _index_left : & SourceIndex, _source_right : & Source, _index_right : & SourceIndex, _tokens : & Tokens) -> (Diff) {
[INFO] [stderr]     |                                                                                                                                               ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:664:83
[INFO] [stderr]     |
[INFO] [stderr] 664 |     fn new (_hash_for_empty : & HashValueRef, _hash_for_invalid : & HashValueRef) -> (Self) {
[INFO] [stderr]     |                                                                                      ^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:681:57
[INFO] [stderr]     |
[INFO] [stderr] 681 |     fn include_hash (&mut self, _token : &HashValueRef) -> (HashKey) {
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:694:57
[INFO] [stderr]     |
[INFO] [stderr] 694 |     fn include_path (&mut self, _token : &PathValueRef) -> (HashKey) {
[INFO] [stderr]     |                                                            ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:707:45
[INFO] [stderr]     |
[INFO] [stderr] 707 |     fn select_hash (& self, _key : HashKey) -> (&HashValueRef) {
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:711:45
[INFO] [stderr]     |
[INFO] [stderr] 711 |     fn select_path (& self, _key : PathKey) -> (&PathValueRef) {
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:715:47
[INFO] [stderr]     |
[INFO] [stderr] 715 |     fn order_of_hash (& self, _key : HashKey) -> (TokenOrder) {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> sources/lib/main_diff.rs:719:47
[INFO] [stderr]     |
[INFO] [stderr] 719 |     fn order_of_path (& self, _key : PathKey) -> (TokenOrder) {
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> sources/lib/main_cpio.rs:16:19
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn main () -> (Result<(), io::Error>) {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.58s
[INFO] running `"docker" "inspect" "af9ba189b0ce68c38e3bfe4138eaf8e2662a1a97317aef352ad0131d457d5123"`
[INFO] running `"docker" "rm" "-f" "af9ba189b0ce68c38e3bfe4138eaf8e2662a1a97317aef352ad0131d457d5123"`
[INFO] [stdout] af9ba189b0ce68c38e3bfe4138eaf8e2662a1a97317aef352ad0131d457d5123