[INFO] fetching crate csv-groupby 0.10.0...
[INFO] checking csv-groupby-0.10.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate csv-groupby 0.10.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate csv-groupby 0.10.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate csv-groupby 0.10.0
[INFO] tweaked toml for crates.io crate csv-groupby 0.10.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate csv-groupby 0.10.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate csv-groupby 0.10.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `0.9.0+zstd.1.5.0` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 832b8f89164de0e87d675db5022bd86e418adc1096e9f0d4269cfbddf3f8af70
[INFO] running `Command { std: "docker" "start" "-a" "832b8f89164de0e87d675db5022bd86e418adc1096e9f0d4269cfbddf3f8af70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "832b8f89164de0e87d675db5022bd86e418adc1096e9f0d4269cfbddf3f8af70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "832b8f89164de0e87d675db5022bd86e418adc1096e9f0d4269cfbddf3f8af70", kill_on_drop: false }`
[INFO] [stdout] 832b8f89164de0e87d675db5022bd86e418adc1096e9f0d4269cfbddf3f8af70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 498e7765d5794820ee71aa1de01439b80741845140b64f582549042bb8eb0d72
[INFO] running `Command { std: "docker" "start" "-a" "498e7765d5794820ee71aa1de01439b80741845140b64f582549042bb8eb0d72", kill_on_drop: false }`
[INFO] [stderr] warning: version requirement `0.9.0+zstd.1.5.0` for dependency `zstd` includes semver metadata which will be ignored, removing the metadata is recommended to avoid confusion
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling jobserver v0.1.22
[INFO] [stderr]    Compiling fs_extra v1.2.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]    Compiling zstd-safe v4.1.1+zstd.1.5.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling csv-groupby v0.10.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling zstd-sys v1.6.1+zstd.1.5.0
[INFO] [stdout] warning: unused import: `std::thread::LocalKey`
[INFO] [stdout]  --> build.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::thread::LocalKey;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling jemalloc-sys v0.3.2
[INFO] [stderr]    Compiling pcre2-sys v0.2.5
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking maybe-uninit v2.0.0
[INFO] [stderr]     Checking ryu v1.0.5
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking gimli v0.24.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking addr2line v0.15.2
[INFO] [stderr]     Checking bitflags v1.2.1
[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking rustc-demangle v0.1.20
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking pcre2 v0.2.3
[INFO] [stderr]     Checking chan v0.1.23
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking cpu-time v1.0.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking assert_cmd v0.10.2
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking grep-cli v0.1.6
[INFO] [stderr]     Checking zstd v0.9.0+zstd.1.5.0
[INFO] [stderr]     Checking jemallocator v0.3.2
[INFO] [stderr]     Checking jemalloc-ctl v0.3.3
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cli.rs:315:22
[INFO] [stdout]     |
[INFO] [stdout] 315 |     pub head: Option<(u64)>,
[INFO] [stdout]     |                      ^   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 315 -     pub head: Option<(u64)>,
[INFO] [stdout] 315 +     pub head: Option<u64 >,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cli.rs:319:22
[INFO] [stdout]     |
[INFO] [stdout] 319 |     pub tail: Option<(u64)>,
[INFO] [stdout]     |                      ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 319 -     pub tail: Option<(u64)>,
[INFO] [stdout] 319 +     pub tail: Option<u64 >,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cli.rs:331:26
[INFO] [stdout]     |
[INFO] [stdout] 331 |     pub count_le: Option<(u64)>,
[INFO] [stdout]     |                          ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 331 -     pub count_le: Option<(u64)>,
[INFO] [stdout] 331 +     pub count_le: Option<u64 >,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cli.rs:335:26
[INFO] [stdout]     |
[INFO] [stdout] 335 |     pub count_ge: Option<(u64)>,
[INFO] [stdout]     |                          ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 335 -     pub count_ge: Option<(u64)>,
[INFO] [stdout] 335 +     pub count_ge: Option<u64 >,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/keysum.rs:104:16
[INFO] [stdout]     |
[INFO] [stdout] 104 |             if ( v.is_none()) {
[INFO] [stdout]     |                ^^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 104 -             if ( v.is_none()) {
[INFO] [stdout] 104 +             if v.is_none()  {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cli.rs:315:22
[INFO] [stdout]     |
[INFO] [stdout] 315 |     pub head: Option<(u64)>,
[INFO] [stdout]     |                      ^   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 315 -     pub head: Option<(u64)>,
[INFO] [stdout] 315 +     pub head: Option<u64 >,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cli.rs:319:22
[INFO] [stdout]     |
[INFO] [stdout] 319 |     pub tail: Option<(u64)>,
[INFO] [stdout]     |                      ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 319 -     pub tail: Option<(u64)>,
[INFO] [stdout] 319 +     pub tail: Option<u64 >,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cli.rs:331:26
[INFO] [stdout]     |
[INFO] [stdout] 331 |     pub count_le: Option<(u64)>,
[INFO] [stdout]     |                          ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 331 -     pub count_le: Option<(u64)>,
[INFO] [stdout] 331 +     pub count_le: Option<u64 >,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/cli.rs:335:26
[INFO] [stdout]     |
[INFO] [stdout] 335 |     pub count_ge: Option<(u64)>,
[INFO] [stdout]     |                          ^   ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 335 -     pub count_ge: Option<(u64)>,
[INFO] [stdout] 335 +     pub count_ge: Option<u64 >,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/keysum.rs:104:16
[INFO] [stdout]     |
[INFO] [stdout] 104 |             if ( v.is_none()) {
[INFO] [stdout]     |                ^^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 104 -             if ( v.is_none()) {
[INFO] [stdout] 104 +             if v.is_none()  {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gettid` is never used
[INFO] [stdout]   --> src/gen.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn gettid() -> usize {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greek` is never used
[INFO] [stdout]    --> src/gen.rs:163:8
[INFO] [stdout]     |
[INFO] [stdout] 163 | pub fn greek(v: f64) -> String {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `user_pause` is never used
[INFO] [stdout]    --> src/gen.rs:207:8
[INFO] [stdout]     |
[INFO] [stdout] 207 | pub fn user_pause() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IoSlicerStatus` is never constructed
[INFO] [stdout]    --> src/gen.rs:216:12
[INFO] [stdout]     |
[INFO] [stdout] 216 | pub struct IoSlicerStatus {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/gen.rs:223:12
[INFO] [stdout]     |
[INFO] [stdout] 222 | impl IoSlicerStatus {
[INFO] [stdout]     | ------------------- associated function in this implementation
[INFO] [stdout] 223 |     pub fn new() -> IoSlicerStatus {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileSlice` is never constructed
[INFO] [stdout]    --> src/gen.rs:233:12
[INFO] [stdout]     |
[INFO] [stdout] 233 | pub struct FileSlice {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fill_buff` is never used
[INFO] [stdout]    --> src/gen.rs:241:4
[INFO] [stdout]     |
[INFO] [stdout] 241 | fn fill_buff(handle: &mut dyn Read, buff: &mut [u8]) -> Result<usize, std::io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `io_thread_slicer` is never used
[INFO] [stdout]    --> src/gen.rs:263:8
[INFO] [stdout]     |
[INFO] [stdout] 263 | pub fn io_thread_slicer(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `caps_to_vec_strings` is never used
[INFO] [stdout]    --> src/gen.rs:379:8
[INFO] [stdout]     |
[INFO] [stdout] 379 | pub fn caps_to_vec_strings(caps: &Captures_pcre2) -> Vec<String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `subs_from_path_buff` is never used
[INFO] [stdout]    --> src/gen.rs:389:8
[INFO] [stdout]     |
[INFO] [stdout] 389 | pub fn subs_from_path_buff(path: &PathBuf, regex: &Option<Regex_pre2>) -> (bool, Vec<String>) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `per_file_thread` is never used
[INFO] [stdout]    --> src/gen.rs:402:8
[INFO] [stdout]     |
[INFO] [stdout] 402 | pub fn per_file_thread(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/append.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     #[structopt(short = "p", long = "prefix_str", name = "prefixstr", default_value = "")]
[INFO] [stdout] 21 | |     /// string to prefix to stdout
[INFO] [stdout] 22 | |     pub prefix_str: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/append.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     #[structopt(short = "a", long = "append_str", name = "appendstr", default_value = "")]
[INFO] [stdout] 24 | |     /// string to append to stdout
[INFO] [stdout] 25 | |     pub append_str: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `csv-groupby` (bin "append" test) due to 2 previous errors; 11 warnings emitted
[INFO] [stdout] warning: function `gettid` is never used
[INFO] [stdout]   --> src/gen.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn gettid() -> usize {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: function `mem_metric` is never used
[INFO] [stdout]   --> src/gen.rs:98:4
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn mem_metric<'a>(v: usize) -> (f64, &'a str) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sig_dig` is never used
[INFO] [stdout]    --> src/gen.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn sig_dig(v: f64, digits: usize) -> String {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mem_metric_digit` is never used
[INFO] [stdout]    --> src/gen.rs:136:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | pub fn mem_metric_digit(v: usize, sig: usize) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greek` is never used
[INFO] [stdout]    --> src/gen.rs:163:8
[INFO] [stdout]     |
[INFO] [stdout] 163 | pub fn greek(v: f64) -> String {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `user_pause` is never used
[INFO] [stdout]    --> src/gen.rs:207:8
[INFO] [stdout]     |
[INFO] [stdout] 207 | pub fn user_pause() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IoSlicerStatus` is never constructed
[INFO] [stdout]    --> src/gen.rs:216:12
[INFO] [stdout]     |
[INFO] [stdout] 216 | pub struct IoSlicerStatus {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/gen.rs:223:12
[INFO] [stdout]     |
[INFO] [stdout] 222 | impl IoSlicerStatus {
[INFO] [stdout]     | ------------------- associated function in this implementation
[INFO] [stdout] 223 |     pub fn new() -> IoSlicerStatus {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileSlice` is never constructed
[INFO] [stdout]    --> src/gen.rs:233:12
[INFO] [stdout]     |
[INFO] [stdout] 233 | pub struct FileSlice {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fill_buff` is never used
[INFO] [stdout]    --> src/gen.rs:241:4
[INFO] [stdout]     |
[INFO] [stdout] 241 | fn fill_buff(handle: &mut dyn Read, buff: &mut [u8]) -> Result<usize, std::io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `io_thread_slicer` is never used
[INFO] [stdout]    --> src/gen.rs:263:8
[INFO] [stdout]     |
[INFO] [stdout] 263 | pub fn io_thread_slicer(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `caps_to_vec_strings` is never used
[INFO] [stdout]    --> src/gen.rs:379:8
[INFO] [stdout]     |
[INFO] [stdout] 379 | pub fn caps_to_vec_strings(caps: &Captures_pcre2) -> Vec<String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `subs_from_path_buff` is never used
[INFO] [stdout]    --> src/gen.rs:389:8
[INFO] [stdout]     |
[INFO] [stdout] 389 | pub fn subs_from_path_buff(path: &PathBuf, regex: &Option<Regex_pre2>) -> (bool, Vec<String>) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `per_file_thread` is never used
[INFO] [stdout]    --> src/gen.rs:402:8
[INFO] [stdout]     |
[INFO] [stdout] 402 | pub fn per_file_thread(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/append.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     #[structopt(short = "p", long = "prefix_str", name = "prefixstr", default_value = "")]
[INFO] [stdout] 21 | |     /// string to prefix to stdout
[INFO] [stdout] 22 | |     pub prefix_str: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/append.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     #[structopt(short = "a", long = "append_str", name = "appendstr", default_value = "")]
[INFO] [stdout] 24 | |     /// string to append to stdout
[INFO] [stdout] 25 | |     pub append_str: String,
[INFO] [stdout]    | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `csv-groupby` (bin "append") due to 2 previous errors; 14 warnings emitted
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/keysum.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |             let mut v = self.matrix.get_mut(i);
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `null_str`
[INFO] [stdout]    --> src/keysum.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let null_str = String::from("NULL");
[INFO] [stdout]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_null_str`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ss`
[INFO] [stdout]    --> src/keysum.rs:167:53
[INFO] [stdout]     |
[INFO] [stdout] 167 | pub fn schema_rec<T>(matrix: &mut Vec<Vec<String>>, ss: &mut String, line: &str, record: &T, rec_len: usize, map: &mut MyMap, cfg: &CliCf...
[INFO] [stdout]     |                                                     ^^ help: if this is intentional, prefix it with an underscore: `_ss`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/keysum.rs:167:70
[INFO] [stdout]     |
[INFO] [stdout] 167 | ...Vec<String>>, ss: &mut String, line: &str, record: &T, rec_len: usize, map: &mut MyMap, cfg: &CliCfg, rowcount: &mut usize) -> (usize,...
[INFO] [stdout]     |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `map`
[INFO] [stdout]    --> src/keysum.rs:167:110
[INFO] [stdout]     |
[INFO] [stdout] 167 | ...tr, record: &T, rec_len: usize, map: &mut MyMap, cfg: &CliCfg, rowcount: &mut usize) -> (usize,usize)
[INFO] [stdout]     |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cfg`
[INFO] [stdout]    --> src/keysum.rs:167:127
[INFO] [stdout]     |
[INFO] [stdout] 167 | ...ec_len: usize, map: &mut MyMap, cfg: &CliCfg, rowcount: &mut usize) -> (usize,usize)
[INFO] [stdout]     |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_cfg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rowcount`
[INFO] [stdout]    --> src/keysum.rs:167:141
[INFO] [stdout]     |
[INFO] [stdout] 167 | ... &mut MyMap, cfg: &CliCfg, rowcount: &mut usize) -> (usize,usize)
[INFO] [stdout]     |                               ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rowcount`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/keysum.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     let mut lines_filtered = 0usize;
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/keysum.rs:251:9
[INFO] [stdout]     |
[INFO] [stdout] 251 |     let mut brec: &mut KeySum = {
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:496:17
[INFO] [stdout]     |
[INFO] [stdout] 496 |             let mut print_skipped = false; // for the stuff after head and before tail
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `print_skipped`
[INFO] [stdout]    --> src/main.rs:496:17
[INFO] [stdout]     |
[INFO] [stdout] 496 |             let mut print_skipped = false; // for the stuff after head and before tail
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_print_skipped`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inner_count`
[INFO] [stdout]    --> src/main.rs:843:30
[INFO] [stdout]     |
[INFO] [stdout] 843 |             'LINE_LOOP: for (inner_count, line) in slice.split(|c| *c == b'\n').enumerate() {
[INFO] [stdout]     |                              ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_inner_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:922:9
[INFO] [stdout]     |
[INFO] [stdout] 922 |     let mut csv_builder = create_csv_builder(&cfg);
[INFO] [stdout]     |         ----^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/main.rs:987:56
[INFO] [stdout]     |
[INFO] [stdout] 987 | ...                   csv::ErrorKind::Utf8 { ref err, pos } => {
[INFO] [stdout]     |                                              ^^^^^^^ help: try ignoring the field: `err: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `cnt_rec` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:999:21
[INFO] [stdout]     |
[INFO] [stdout] 999 |                 let mut cnt_rec = 0usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_cnt_rec` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]     --> src/main.rs:1021:56
[INFO] [stdout]      |
[INFO] [stdout] 1021 | ...                   csv::ErrorKind::Utf8 { ref err, pos } => {
[INFO] [stdout]      |                                              ^^^^^^^ help: try ignoring the field: `err: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cnt_rec` is never read
[INFO] [stdout]     --> src/main.rs:1015:37
[INFO] [stdout]      |
[INFO] [stdout] 1015 | ...                   cnt_rec += 1;
[INFO] [stdout]      |                       ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/main.rs:1148:28
[INFO] [stdout]      |
[INFO] [stdout] 1148 |                 if let Err(e) = line {
[INFO] [stdout]      |                            ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:1215:13
[INFO] [stdout]      |
[INFO] [stdout] 1215 |         let mut b = slice[pos];
[INFO] [stdout]      |             ----^
[INFO] [stdout]      |             |
[INFO] [stdout]      |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:761:20
[INFO] [stdout]     |
[INFO] [stdout] 761 |             panic!(err_msg);
[INFO] [stdout]     |                    ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 761 |             panic!("{}", err_msg);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:908:20
[INFO] [stdout]     |
[INFO] [stdout] 908 |             panic!(err_msg);
[INFO] [stdout]     |                    ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 908 |             panic!("{}", err_msg);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]     --> src/main.rs:1049:20
[INFO] [stdout]      |
[INFO] [stdout] 1049 |             panic!(err_msg);
[INFO] [stdout]      |                    ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]      |
[INFO] [stdout] 1049 |             panic!("{}", err_msg);
[INFO] [stdout]      |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `ISO_8859` should have a snake case name
[INFO] [stdout]    --> src/cli.rs:296:9
[INFO] [stdout]     |
[INFO] [stdout] 296 |     pub ISO_8859: bool,
[INFO] [stdout]     |         ^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `iso_8859`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]   --> src/cli.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | /     #[structopt(short = "R", long = "test_re", name = "testre", conflicts_with_all = & ["keyfield", "uniquefield", "sumfield", "avgfield"])]
[INFO] [stdout] 51 | |     /// One-off test of a regex
[INFO] [stdout] 52 | |     ///
[INFO] [stdout] 53 | |     /// Used with -L for lines on command line OR type of pipe strings to test using stdin.
[INFO] [stdout] 54 | |     pub testre: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]   --> src/cli.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 | /     #[structopt(short = "L", long = "test_line", name = "testline", requires = "testre", conflicts_with_all = & ["keyfield", "uniquefield...
[INFO] [stdout] 57 | |     /// Line(s) of text to test with -R option instead of stdin
[INFO] [stdout] 58 | |     pub testlines: Vec<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:117:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | /     #[structopt(short = "r", long = "regex", conflicts_with = "delimiter")]
[INFO] [stdout] 118 | |     /// Regex mode regular expression to parse fields
[INFO] [stdout] 119 | |     ///
[INFO] [stdout] 120 | |     /// Several -r <RE> used?  Experimental.  Notes:
[INFO] [stdout] ...   |
[INFO] [stdout] 128 | |     /// is well formatted across multiple lines.
[INFO] [stdout] 129 | |     pub re_str: Vec<String>,
[INFO] [stdout]     | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 | /     #[structopt(short = "p", long = "path_re")]
[INFO] [stdout] 132 | |     /// Match path on files and get fields from sub groups
[INFO] [stdout] 133 | |     ///
[INFO] [stdout] 134 | |     /// If the matches have sub groups, then use those strings as parts to summarized.
[INFO] [stdout] 135 | |     /// This works in CSV mode as well as Regex mode, but not while parsing STDIO
[INFO] [stdout] 136 | |     pub re_path: Option<String>,
[INFO] [stdout]     | |_______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 | /     #[structopt(long = "re_line_contains")]
[INFO] [stdout] 139 | |     /// Grep lines that must contain a string
[INFO] [stdout] 140 | |     ///
[INFO] [stdout] 141 | |     /// Gives a hint to regex mode to presearch a line before testing regex.
[INFO] [stdout] 142 | |     /// This may speed up regex mode significantly as it is a simple contains check
[INFO] [stdout] 143 | |     /// if the lines you match on are a minority to the whole.
[INFO] [stdout] 144 | |     pub re_line_contains: Option<String>,
[INFO] [stdout]     | |________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 | /     #[structopt(short = "o", long = "output_delimiter", name = "outputdelimiter", default_value = ",")]
[INFO] [stdout] 177 | |     /// Output delimiter for written summaries
[INFO] [stdout] 178 | |     pub od: String,
[INFO] [stdout]     | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 | /     #[structopt(long = "empty_string", default_value = "")]
[INFO] [stdout] 201 | |     /// Empty string substitution
[INFO] [stdout] 202 | |     ///
[INFO] [stdout] 203 | |     /// This is different from NULLs where nothing is known - not even an empty string
[INFO] [stdout] 204 | |     pub empty: String,
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 257 | /     #[structopt(short = "w", long = "walk", name = "walk", conflicts_with_all = & ["file", "file_list", "stdin_file_list"])]
[INFO] [stdout] 258 | |     /// recursively walk a tree of files to parse
[INFO] [stdout] 259 | |     ///
[INFO] [stdout] 260 | |     /// This can be used with option path_re to limit what files a parsed
[INFO] [stdout] 261 | |     pub walk: Option<String>,
[INFO] [stdout]     | |____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:287:5
[INFO] [stdout]     |
[INFO] [stdout] 287 | /     #[structopt(long = "null_write", name = "nullstring", default_value = "NULL")]
[INFO] [stdout] 288 | |     /// String to use for NULL fields
[INFO] [stdout] 289 | |     pub null: String,
[INFO] [stdout]     | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `csv-groupby` (bin "gb") due to 9 previous errors; 28 warnings emitted
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/keysum.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |             let mut v = self.matrix.get_mut(i);
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `null_str`
[INFO] [stdout]    --> src/keysum.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let null_str = String::from("NULL");
[INFO] [stdout]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_null_str`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ss`
[INFO] [stdout]    --> src/keysum.rs:167:53
[INFO] [stdout]     |
[INFO] [stdout] 167 | pub fn schema_rec<T>(matrix: &mut Vec<Vec<String>>, ss: &mut String, line: &str, record: &T, rec_len: usize, map: &mut MyMap, cfg: &CliCf...
[INFO] [stdout]     |                                                     ^^ help: if this is intentional, prefix it with an underscore: `_ss`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/keysum.rs:167:70
[INFO] [stdout]     |
[INFO] [stdout] 167 | ...Vec<String>>, ss: &mut String, line: &str, record: &T, rec_len: usize, map: &mut MyMap, cfg: &CliCfg, rowcount: &mut usize) -> (usize,...
[INFO] [stdout]     |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `map`
[INFO] [stdout]    --> src/keysum.rs:167:110
[INFO] [stdout]     |
[INFO] [stdout] 167 | ...tr, record: &T, rec_len: usize, map: &mut MyMap, cfg: &CliCfg, rowcount: &mut usize) -> (usize,usize)
[INFO] [stdout]     |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cfg`
[INFO] [stdout]    --> src/keysum.rs:167:127
[INFO] [stdout]     |
[INFO] [stdout] 167 | ...ec_len: usize, map: &mut MyMap, cfg: &CliCfg, rowcount: &mut usize) -> (usize,usize)
[INFO] [stdout]     |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_cfg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rowcount`
[INFO] [stdout]    --> src/keysum.rs:167:141
[INFO] [stdout]     |
[INFO] [stdout] 167 | ... &mut MyMap, cfg: &CliCfg, rowcount: &mut usize) -> (usize,usize)
[INFO] [stdout]     |                               ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rowcount`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/keysum.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     let mut lines_filtered = 0usize;
[INFO] [stdout]     |         ----^^^^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/keysum.rs:251:9
[INFO] [stdout]     |
[INFO] [stdout] 251 |     let mut brec: &mut KeySum = {
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:496:17
[INFO] [stdout]     |
[INFO] [stdout] 496 |             let mut print_skipped = false; // for the stuff after head and before tail
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `print_skipped`
[INFO] [stdout]    --> src/main.rs:496:17
[INFO] [stdout]     |
[INFO] [stdout] 496 |             let mut print_skipped = false; // for the stuff after head and before tail
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_print_skipped`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inner_count`
[INFO] [stdout]    --> src/main.rs:843:30
[INFO] [stdout]     |
[INFO] [stdout] 843 |             'LINE_LOOP: for (inner_count, line) in slice.split(|c| *c == b'\n').enumerate() {
[INFO] [stdout]     |                              ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_inner_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:922:9
[INFO] [stdout]     |
[INFO] [stdout] 922 |     let mut csv_builder = create_csv_builder(&cfg);
[INFO] [stdout]     |         ----^^^^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/main.rs:987:56
[INFO] [stdout]     |
[INFO] [stdout] 987 | ...                   csv::ErrorKind::Utf8 { ref err, pos } => {
[INFO] [stdout]     |                                              ^^^^^^^ help: try ignoring the field: `err: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `cnt_rec` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:999:21
[INFO] [stdout]     |
[INFO] [stdout] 999 |                 let mut cnt_rec = 0usize;
[INFO] [stdout]     |                     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_cnt_rec` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]     --> src/main.rs:1021:56
[INFO] [stdout]      |
[INFO] [stdout] 1021 | ...                   csv::ErrorKind::Utf8 { ref err, pos } => {
[INFO] [stdout]      |                                              ^^^^^^^ help: try ignoring the field: `err: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cnt_rec` is never read
[INFO] [stdout]     --> src/main.rs:1015:37
[INFO] [stdout]      |
[INFO] [stdout] 1015 | ...                   cnt_rec += 1;
[INFO] [stdout]      |                       ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]     --> src/main.rs:1148:28
[INFO] [stdout]      |
[INFO] [stdout] 1148 |                 if let Err(e) = line {
[INFO] [stdout]      |                            ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/main.rs:1215:13
[INFO] [stdout]      |
[INFO] [stdout] 1215 |         let mut b = slice[pos];
[INFO] [stdout]      |             ----^
[INFO] [stdout]      |             |
[INFO] [stdout]      |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:761:20
[INFO] [stdout]     |
[INFO] [stdout] 761 |             panic!(err_msg);
[INFO] [stdout]     |                    ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 761 |             panic!("{}", err_msg);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:908:20
[INFO] [stdout]     |
[INFO] [stdout] 908 |             panic!(err_msg);
[INFO] [stdout]     |                    ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 908 |             panic!("{}", err_msg);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]     --> src/main.rs:1049:20
[INFO] [stdout]      |
[INFO] [stdout] 1049 |             panic!(err_msg);
[INFO] [stdout]      |                    ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]      |
[INFO] [stdout] 1049 |             panic!("{}", err_msg);
[INFO] [stdout]      |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `ISO_8859` should have a snake case name
[INFO] [stdout]    --> src/cli.rs:296:9
[INFO] [stdout]     |
[INFO] [stdout] 296 |     pub ISO_8859: bool,
[INFO] [stdout]     |         ^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `iso_8859`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]   --> src/cli.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | /     #[structopt(short = "R", long = "test_re", name = "testre", conflicts_with_all = & ["keyfield", "uniquefield", "sumfield", "avgfield"])]
[INFO] [stdout] 51 | |     /// One-off test of a regex
[INFO] [stdout] 52 | |     ///
[INFO] [stdout] 53 | |     /// Used with -L for lines on command line OR type of pipe strings to test using stdin.
[INFO] [stdout] 54 | |     pub testre: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]   --> src/cli.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 | /     #[structopt(short = "L", long = "test_line", name = "testline", requires = "testre", conflicts_with_all = & ["keyfield", "uniquefield...
[INFO] [stdout] 57 | |     /// Line(s) of text to test with -R option instead of stdin
[INFO] [stdout] 58 | |     pub testlines: Vec<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:117:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | /     #[structopt(short = "r", long = "regex", conflicts_with = "delimiter")]
[INFO] [stdout] 118 | |     /// Regex mode regular expression to parse fields
[INFO] [stdout] 119 | |     ///
[INFO] [stdout] 120 | |     /// Several -r <RE> used?  Experimental.  Notes:
[INFO] [stdout] ...   |
[INFO] [stdout] 128 | |     /// is well formatted across multiple lines.
[INFO] [stdout] 129 | |     pub re_str: Vec<String>,
[INFO] [stdout]     | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 | /     #[structopt(short = "p", long = "path_re")]
[INFO] [stdout] 132 | |     /// Match path on files and get fields from sub groups
[INFO] [stdout] 133 | |     ///
[INFO] [stdout] 134 | |     /// If the matches have sub groups, then use those strings as parts to summarized.
[INFO] [stdout] 135 | |     /// This works in CSV mode as well as Regex mode, but not while parsing STDIO
[INFO] [stdout] 136 | |     pub re_path: Option<String>,
[INFO] [stdout]     | |_______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 | /     #[structopt(long = "re_line_contains")]
[INFO] [stdout] 139 | |     /// Grep lines that must contain a string
[INFO] [stdout] 140 | |     ///
[INFO] [stdout] 141 | |     /// Gives a hint to regex mode to presearch a line before testing regex.
[INFO] [stdout] 142 | |     /// This may speed up regex mode significantly as it is a simple contains check
[INFO] [stdout] 143 | |     /// if the lines you match on are a minority to the whole.
[INFO] [stdout] 144 | |     pub re_line_contains: Option<String>,
[INFO] [stdout]     | |________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 176 | /     #[structopt(short = "o", long = "output_delimiter", name = "outputdelimiter", default_value = ",")]
[INFO] [stdout] 177 | |     /// Output delimiter for written summaries
[INFO] [stdout] 178 | |     pub od: String,
[INFO] [stdout]     | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 | /     #[structopt(long = "empty_string", default_value = "")]
[INFO] [stdout] 201 | |     /// Empty string substitution
[INFO] [stdout] 202 | |     ///
[INFO] [stdout] 203 | |     /// This is different from NULLs where nothing is known - not even an empty string
[INFO] [stdout] 204 | |     pub empty: String,
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 257 | /     #[structopt(short = "w", long = "walk", name = "walk", conflicts_with_all = & ["file", "file_list", "stdin_file_list"])]
[INFO] [stdout] 258 | |     /// recursively walk a tree of files to parse
[INFO] [stdout] 259 | |     ///
[INFO] [stdout] 260 | |     /// This can be used with option path_re to limit what files a parsed
[INFO] [stdout] 261 | |     pub walk: Option<String>,
[INFO] [stdout]     | |____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<String, Infallible>
[INFO] [stdout]    --> src/cli.rs:287:5
[INFO] [stdout]     |
[INFO] [stdout] 287 | /     #[structopt(long = "null_write", name = "nullstring", default_value = "NULL")]
[INFO] [stdout] 288 | |     /// String to use for NULL fields
[INFO] [stdout] 289 | |     pub null: String,
[INFO] [stdout]     | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `csv-groupby` (bin "gb" test) due to 9 previous errors; 28 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "498e7765d5794820ee71aa1de01439b80741845140b64f582549042bb8eb0d72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "498e7765d5794820ee71aa1de01439b80741845140b64f582549042bb8eb0d72", kill_on_drop: false }`
[INFO] [stdout] 498e7765d5794820ee71aa1de01439b80741845140b64f582549042bb8eb0d72
