[INFO] cloning repository https://github.com/wspeirs/mem_table
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wspeirs/mem_table" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwspeirs%2Fmem_table", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwspeirs%2Fmem_table'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d0929fbfdbbe9af59dc2d5951a6b01dd456afdd1
[INFO] testing wspeirs/mem_table against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwspeirs%2Fmem_table" "/workspace/builds/worker-118/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-118/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wspeirs/mem_table on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wspeirs/mem_table
[INFO] finished tweaking git repo https://github.com/wspeirs/mem_table
[INFO] tweaked toml for git repo https://github.com/wspeirs/mem_table written to /workspace/builds/worker-118/source/Cargo.toml
[INFO] crate git repo https://github.com/wspeirs/mem_table already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 327f48d2f6ff7919f19d65bef2ba22a82df40267e4bfb2b8b6e370b2be19535a
[INFO] running `Command { std: "docker" "start" "-a" "327f48d2f6ff7919f19d65bef2ba22a82df40267e4bfb2b8b6e370b2be19535a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "327f48d2f6ff7919f19d65bef2ba22a82df40267e4bfb2b8b6e370b2be19535a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "327f48d2f6ff7919f19d65bef2ba22a82df40267e4bfb2b8b6e370b2be19535a", kill_on_drop: false }`
[INFO] [stdout] 327f48d2f6ff7919f19d65bef2ba22a82df40267e4bfb2b8b6e370b2be19535a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76fc8fc280885d0ee0dc650ef22a25b736418c15f16a4b9174a9b60bd8decf90
[INFO] running `Command { std: "docker" "start" "-a" "76fc8fc280885d0ee0dc650ef22a25b736418c15f16a4b9174a9b60bd8decf90", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.5
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling num-rational v0.2.3
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling csv-core v0.1.6
[INFO] [stderr]    Compiling regex-automata v0.1.8
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling crossbeam-deque v0.7.2
[INFO] [stderr]    Compiling ordered-float v1.0.2
[INFO] [stderr]    Compiling chrono v0.4.10
[INFO] [stderr]    Compiling rayon v1.3.0
[INFO] [stderr]    Compiling bstr v0.2.9
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling rust_decimal v0.10.2
[INFO] [stderr]    Compiling csv v1.1.2
[INFO] [stderr]    Compiling dtparse v1.0.3
[INFO] [stderr]    Compiling large_table v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error as IOError`, `Read`
[INFO] [stdout]  --> src/lib.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, Read};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display`, `Error as FmtError`, `Formatter`
[INFO] [stdout]  --> src/lib.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::fmt::{Display, Formatter, Error as FmtError};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Hash`, `Hasher`
[INFO] [stdout]  --> src/lib.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                 ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Ref`
[INFO] [stdout]   --> src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::cell::Ref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::FusedIterator`
[INFO] [stdout]   --> src/lib.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::iter::FusedIterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::ops::Index;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Reader`
[INFO] [stdout]   --> src/lib.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | use csv::{Reader, Writer};
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/row.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/row.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/row.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Table`
[INFO] [stdout]  --> src/row.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::Table;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> src/row_table.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::hash_map::RandomState`
[INFO] [stdout]  --> src/row_table.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::hash_map::RandomState;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::Map`
[INFO] [stdout]  --> src/row_table.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::Map;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ByteRecord`, `ReaderBuilder`, `Trim`
[INFO] [stdout]   --> src/row_table.rs:12:33
[INFO] [stdout]    |
[INFO] [stdout] 12 | use csv::{Reader, StringRecord, ByteRecord, ReaderBuilder, Trim};
[INFO] [stdout]    |                                 ^^^^^^^^^^  ^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Cursor`
[INFO] [stdout]  --> src/mmap_table.rs:5:44
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, ErrorKind, Cursor};
[INFO] [stdout]   |                                            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MmapOptions`
[INFO] [stdout]  --> src/mmap_table.rs:9:23
[INFO] [stdout]   |
[INFO] [stdout] 9 | use memmap::{MmapMut, MmapOptions};
[INFO] [stdout]   |                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]   --> src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use rayon::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]   --> src/row_table.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use rayon::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]    --> src/lib.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let pos = self.column_position(column)?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]   --> src/row.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stdout]    |                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/row.rs:30:37
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stdout]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:269:56
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:284:40
[INFO] [stdout]     |
[INFO] [stdout] 284 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:381:40
[INFO] [stdout]     |
[INFO] [stdout] 381 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]    --> src/row_table.rs:451:13
[INFO] [stdout]     |
[INFO] [stdout] 451 |         let new_val = (new_col.to_string(), self.column_map[pos].1);
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `written`
[INFO] [stdout]   --> src/mmap_table.rs:42:29
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_ends`
[INFO] [stdout]   --> src/mmap_table.rs:42:38
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stdout]    |                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `update`
[INFO] [stdout]   --> src/mmap_table.rs:84:59
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn update_by<F: FnMut(&mut Self::RowType)>(&mut self, update: F) {
[INFO] [stdout]    |                                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_update`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/mmap_table.rs:88:33
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn append_row<R>(&mut self, row: R) -> Result<(), TableError> where R: Row {
[INFO] [stdout]    |                                 ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_name`
[INFO] [stdout]   --> src/mmap_table.rs:92:56
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/mmap_table.rs:92:75
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stdout]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_col`
[INFO] [stdout]   --> src/mmap_table.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stdout]    |                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_col`
[INFO] [stdout]   --> src/mmap_table.rs:96:48
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stdout]    |                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]    --> src/mmap_table.rs:131:24
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stdout]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mid`
[INFO] [stdout]    --> src/mmap_table.rs:151:29
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:182:56
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read`
[INFO] [stdout]    --> src/mmap_table.rs:200:19
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `written`
[INFO] [stdout]    --> src/mmap_table.rs:200:25
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_ends`
[INFO] [stdout]    --> src/mmap_table.rs:200:34
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:217:40
[INFO] [stdout]     |
[INFO] [stdout] 217 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:255:40
[INFO] [stdout]     |
[INFO] [stdout] 255 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]    --> src/mmap_table.rs:258:24
[INFO] [stdout]     |
[INFO] [stdout] 258 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stdout]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mid`
[INFO] [stdout]    --> src/mmap_table.rs:281:29
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `compare`
[INFO] [stdout]    --> src/mmap_table.rs:287:75
[INFO] [stdout]     |
[INFO] [stdout] 287 |     fn sort_by<F: FnMut(Self::RowType, Self::RowType) -> Ordering>(&self, compare: F) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                                                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_compare`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_col`
[INFO] [stdout]    --> src/mmap_table.rs:291:29
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_col`
[INFO] [stdout]    --> src/mmap_table.rs:291:44
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mmap_table.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut mmap = unsafe { MmapMut::map_mut(&file)? };
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             self.append_row(row);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |         csv.write_record(self.columns());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 | /             csv.write_record(self.columns().iter().map(|c| {
[INFO] [stdout] 173 | |                 row.get(c).as_string()
[INFO] [stdout] 174 | |             }));
[INFO] [stdout]     | |________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/row_table.rs:344:13
[INFO] [stdout]     |
[INFO] [stdout] 344 |             writeln!(f, "{:?}", self.table.lock().unwrap().rows[*row]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 53 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.94s
[INFO] running `Command { std: "docker" "inspect" "76fc8fc280885d0ee0dc650ef22a25b736418c15f16a4b9174a9b60bd8decf90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76fc8fc280885d0ee0dc650ef22a25b736418c15f16a4b9174a9b60bd8decf90", kill_on_drop: false }`
[INFO] [stdout] 76fc8fc280885d0ee0dc650ef22a25b736418c15f16a4b9174a9b60bd8decf90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1c2eae2cb2367bea1035610d633065e4a3ed5b8787ddee8c8cf9f1e1d5e20b8
[INFO] running `Command { std: "docker" "start" "-a" "d1c2eae2cb2367bea1035610d633065e4a3ed5b8787ddee8c8cf9f1e1d5e20b8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling regex-syntax v0.6.14
[INFO] [stderr]    Compiling oorandom v11.1.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling serde_json v1.0.45
[INFO] [stderr]    Compiling plotters v0.2.12
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling simple_logger v0.5.0
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error as IOError`, `Read`
[INFO] [stdout]  --> src/lib.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, Read};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display`, `Error as FmtError`, `Formatter`
[INFO] [stdout]  --> src/lib.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::fmt::{Display, Formatter, Error as FmtError};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Hash`, `Hasher`
[INFO] [stdout]  --> src/lib.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                 ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Ref`
[INFO] [stdout]   --> src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::cell::Ref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::FusedIterator`
[INFO] [stdout]   --> src/lib.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::iter::FusedIterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::ops::Index;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Reader`
[INFO] [stdout]   --> src/lib.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | use csv::{Reader, Writer};
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/row.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/row.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/row.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Table`
[INFO] [stdout]  --> src/row.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::Table;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> src/row_table.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::hash_map::RandomState`
[INFO] [stdout]  --> src/row_table.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::hash_map::RandomState;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::Map`
[INFO] [stdout]  --> src/row_table.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::Map;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ByteRecord`, `ReaderBuilder`, `Trim`
[INFO] [stdout]   --> src/row_table.rs:12:33
[INFO] [stdout]    |
[INFO] [stdout] 12 | use csv::{Reader, StringRecord, ByteRecord, ReaderBuilder, Trim};
[INFO] [stdout]    |                                 ^^^^^^^^^^  ^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Cursor`
[INFO] [stdout]  --> src/mmap_table.rs:5:44
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, ErrorKind, Cursor};
[INFO] [stdout]   |                                            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MmapOptions`
[INFO] [stdout]  --> src/mmap_table.rs:9:23
[INFO] [stdout]   |
[INFO] [stdout] 9 | use memmap::{MmapMut, MmapOptions};
[INFO] [stdout]   |                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]   --> src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use rayon::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]   --> src/row_table.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use rayon::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]    --> src/lib.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let pos = self.column_position(column)?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]   --> src/row.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stdout]    |                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/row.rs:30:37
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stdout]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:269:56
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:284:40
[INFO] [stdout]     |
[INFO] [stdout] 284 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:381:40
[INFO] [stdout]     |
[INFO] [stdout] 381 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]    --> src/row_table.rs:451:13
[INFO] [stdout]     |
[INFO] [stdout] 451 |         let new_val = (new_col.to_string(), self.column_map[pos].1);
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `written`
[INFO] [stdout]   --> src/mmap_table.rs:42:29
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_ends`
[INFO] [stdout]   --> src/mmap_table.rs:42:38
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stdout]    |                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `update`
[INFO] [stdout]   --> src/mmap_table.rs:84:59
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn update_by<F: FnMut(&mut Self::RowType)>(&mut self, update: F) {
[INFO] [stdout]    |                                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_update`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/mmap_table.rs:88:33
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn append_row<R>(&mut self, row: R) -> Result<(), TableError> where R: Row {
[INFO] [stdout]    |                                 ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_name`
[INFO] [stdout]   --> src/mmap_table.rs:92:56
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/mmap_table.rs:92:75
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stdout]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_col`
[INFO] [stdout]   --> src/mmap_table.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stdout]    |                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_col`
[INFO] [stdout]   --> src/mmap_table.rs:96:48
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stdout]    |                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]    --> src/mmap_table.rs:131:24
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stdout]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mid`
[INFO] [stdout]    --> src/mmap_table.rs:151:29
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:182:56
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read`
[INFO] [stdout]    --> src/mmap_table.rs:200:19
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `written`
[INFO] [stdout]    --> src/mmap_table.rs:200:25
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_ends`
[INFO] [stdout]    --> src/mmap_table.rs:200:34
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:217:40
[INFO] [stdout]     |
[INFO] [stdout] 217 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:255:40
[INFO] [stdout]     |
[INFO] [stdout] 255 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]    --> src/mmap_table.rs:258:24
[INFO] [stdout]     |
[INFO] [stdout] 258 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stdout]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mid`
[INFO] [stdout]    --> src/mmap_table.rs:281:29
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `compare`
[INFO] [stdout]    --> src/mmap_table.rs:287:75
[INFO] [stdout]     |
[INFO] [stdout] 287 |     fn sort_by<F: FnMut(Self::RowType, Self::RowType) -> Ordering>(&self, compare: F) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                                                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_compare`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_col`
[INFO] [stdout]    --> src/mmap_table.rs:291:29
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_col`
[INFO] [stdout]    --> src/mmap_table.rs:291:44
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mmap_table.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut mmap = unsafe { MmapMut::map_mut(&file)? };
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             self.append_row(row);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |         csv.write_record(self.columns());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 | /             csv.write_record(self.columns().iter().map(|c| {
[INFO] [stdout] 173 | |                 row.get(c).as_string()
[INFO] [stdout] 174 | |             }));
[INFO] [stdout]     | |________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/row_table.rs:344:13
[INFO] [stdout]     |
[INFO] [stdout] 344 |             writeln!(f, "{:?}", self.table.lock().unwrap().rows[*row]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 53 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling criterion-plot v0.4.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tinytemplate v1.0.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling regex v1.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling criterion v0.3.1
[INFO] [stderr]    Compiling large_table v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Error as IOError`, `Read`
[INFO] [stdout]  --> src/lib.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, Read};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display`, `Error as FmtError`, `Formatter`
[INFO] [stdout]  --> src/lib.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::fmt::{Display, Formatter, Error as FmtError};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Hash`, `Hasher`
[INFO] [stdout]  --> src/lib.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                 ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Ref`
[INFO] [stdout]   --> src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::cell::Ref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::FusedIterator`
[INFO] [stdout]   --> src/lib.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::iter::FusedIterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::ops::Index;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Reader`
[INFO] [stdout]   --> src/lib.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | use csv::{Reader, Writer};
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/row.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/row.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/row.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Table`
[INFO] [stdout]  --> src/row.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::Table;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> src/row_table.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::hash_map::RandomState`
[INFO] [stdout]  --> src/row_table.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::hash_map::RandomState;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::Map`
[INFO] [stdout]  --> src/row_table.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::Map;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ByteRecord`, `ReaderBuilder`, `Trim`
[INFO] [stdout]   --> src/row_table.rs:12:33
[INFO] [stdout]    |
[INFO] [stdout] 12 | use csv::{Reader, StringRecord, ByteRecord, ReaderBuilder, Trim};
[INFO] [stdout]    |                                 ^^^^^^^^^^  ^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Cursor`
[INFO] [stdout]  --> src/mmap_table.rs:5:44
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{Error as IOError, ErrorKind, Cursor};
[INFO] [stdout]   |                                            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MmapOptions`
[INFO] [stdout]  --> src/mmap_table.rs:9:23
[INFO] [stdout]   |
[INFO] [stdout] 9 | use memmap::{MmapMut, MmapOptions};
[INFO] [stdout]   |                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `chrono::Duration`
[INFO] [stdout]    --> src/mmap_table.rs:321:9
[INFO] [stdout]     |
[INFO] [stdout] 321 |     use chrono::Duration;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]   --> src/lib.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use rayon::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rayon::prelude`
[INFO] [stdout]   --> src/row_table.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use rayon::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]    --> src/lib.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let pos = self.column_position(column)?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]   --> src/row.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stdout]    |                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/row.rs:30:37
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stdout]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:269:56
[INFO] [stdout]     |
[INFO] [stdout] 269 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:284:40
[INFO] [stdout]     |
[INFO] [stdout] 284 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/row_table.rs:381:40
[INFO] [stdout]     |
[INFO] [stdout] 381 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_val`
[INFO] [stdout]    --> src/row_table.rs:451:13
[INFO] [stdout]     |
[INFO] [stdout] 451 |         let new_val = (new_col.to_string(), self.column_map[pos].1);
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `written`
[INFO] [stdout]   --> src/mmap_table.rs:42:29
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stdout]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_ends`
[INFO] [stdout]   --> src/mmap_table.rs:42:38
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stdout]    |                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `update`
[INFO] [stdout]   --> src/mmap_table.rs:84:59
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn update_by<F: FnMut(&mut Self::RowType)>(&mut self, update: F) {
[INFO] [stdout]    |                                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_update`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/mmap_table.rs:88:33
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn append_row<R>(&mut self, row: R) -> Result<(), TableError> where R: Row {
[INFO] [stdout]    |                                 ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column_name`
[INFO] [stdout]   --> src/mmap_table.rs:92:56
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/mmap_table.rs:92:75
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stdout]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_col`
[INFO] [stdout]   --> src/mmap_table.rs:96:33
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stdout]    |                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_col`
[INFO] [stdout]   --> src/mmap_table.rs:96:48
[INFO] [stdout]    |
[INFO] [stdout] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stdout]    |                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]    --> src/mmap_table.rs:131:24
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stdout]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mid`
[INFO] [stdout]    --> src/mmap_table.rs:151:29
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:182:56
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stdout]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read`
[INFO] [stdout]    --> src/mmap_table.rs:200:19
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `written`
[INFO] [stdout]    --> src/mmap_table.rs:200:25
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_ends`
[INFO] [stdout]    --> src/mmap_table.rs:200:34
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stdout]     |                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:217:40
[INFO] [stdout]     |
[INFO] [stdout] 217 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/mmap_table.rs:255:40
[INFO] [stdout]     |
[INFO] [stdout] 255 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stdout]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `column`
[INFO] [stdout]    --> src/mmap_table.rs:258:24
[INFO] [stdout]     |
[INFO] [stdout] 258 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stdout]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mid`
[INFO] [stdout]    --> src/mmap_table.rs:281:29
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `compare`
[INFO] [stdout]    --> src/mmap_table.rs:287:75
[INFO] [stdout]     |
[INFO] [stdout] 287 |     fn sort_by<F: FnMut(Self::RowType, Self::RowType) -> Ordering>(&self, compare: F) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                                                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_compare`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `old_col`
[INFO] [stdout]    --> src/mmap_table.rs:291:29
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_col`
[INFO] [stdout]    --> src/mmap_table.rs:291:44
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stdout]     |                                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mmap_table.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut mmap = unsafe { MmapMut::map_mut(&file)? };
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             self.append_row(row);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |         csv.write_record(self.columns());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 | /             csv.write_record(self.columns().iter().map(|c| {
[INFO] [stdout] 173 | |                 row.get(c).as_string()
[INFO] [stdout] 174 | |             }));
[INFO] [stdout]     | |________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/row_table.rs:344:13
[INFO] [stdout]     |
[INFO] [stdout] 344 |             writeln!(f, "{:?}", self.table.lock().unwrap().rows[*row]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/row_table.rs:504:9
[INFO] [stdout]     |
[INFO] [stdout] 504 |         table.filter_by(|r| { r.get("B"); true });
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/row_table.rs:506:31
[INFO] [stdout]     |
[INFO] [stdout] 506 |         table.update_by(|r| { r.set("B", Value::Integer(7));} );
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 56 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 29.21s
[INFO] running `Command { std: "docker" "inspect" "d1c2eae2cb2367bea1035610d633065e4a3ed5b8787ddee8c8cf9f1e1d5e20b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1c2eae2cb2367bea1035610d633065e4a3ed5b8787ddee8c8cf9f1e1d5e20b8", kill_on_drop: false }`
[INFO] [stdout] d1c2eae2cb2367bea1035610d633065e4a3ed5b8787ddee8c8cf9f1e1d5e20b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 52de232ad8016978ea876278ab96021781ed65bd4a6e7babab6dff4a64e1bd3f
[INFO] running `Command { std: "docker" "start" "-a" "52de232ad8016978ea876278ab96021781ed65bd4a6e7babab6dff4a64e1bd3f", kill_on_drop: false }`
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Error as IOError`, `Read`
[INFO] [stderr]  --> src/lib.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{Error as IOError, Read};
[INFO] [stderr]   |               ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Display`, `Error as FmtError`, `Formatter`
[INFO] [stderr]  --> src/lib.rs:8:16
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fmt::{Display, Formatter, Error as FmtError};
[INFO] [stderr]   |                ^^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Hash`, `Hasher`
[INFO] [stderr]  --> src/lib.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::hash::{Hash, Hasher};
[INFO] [stderr]   |                 ^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::Ref`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::cell::Ref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::FusedIterator`
[INFO] [stderr]   --> src/lib.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::iter::FusedIterator;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Index`
[INFO] [stderr]   --> src/lib.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::ops::Index;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Reader`
[INFO] [stderr]   --> src/lib.rs:16:11
[INFO] [stderr]    |
[INFO] [stderr] 16 | use csv::{Reader, Writer};
[INFO] [stderr]    |           ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/row.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]  --> src/row.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::RefCell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/row.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::Table`
[INFO] [stderr]  --> src/row.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use crate::Table;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Index`
[INFO] [stderr]  --> src/row_table.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::Index;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::hash_map::RandomState`
[INFO] [stderr]  --> src/row_table.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::hash_map::RandomState;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Map`
[INFO] [stderr]  --> src/row_table.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::iter::Map;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ByteRecord`, `ReaderBuilder`, `Trim`
[INFO] [stderr]   --> src/row_table.rs:12:33
[INFO] [stderr]    |
[INFO] [stderr] 12 | use csv::{Reader, StringRecord, ByteRecord, ReaderBuilder, Trim};
[INFO] [stderr]    |                                 ^^^^^^^^^^  ^^^^^^^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Cursor`
[INFO] [stderr]  --> src/mmap_table.rs:5:44
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{Error as IOError, ErrorKind, Cursor};
[INFO] [stderr]   |                                            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `MmapOptions`
[INFO] [stderr]  --> src/mmap_table.rs:9:23
[INFO] [stderr]   |
[INFO] [stderr] 9 | use memmap::{MmapMut, MmapOptions};
[INFO] [stderr]   |                       ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rayon::prelude`
[INFO] [stderr]   --> src/lib.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use rayon::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rayon::prelude`
[INFO] [stderr]   --> src/row_table.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use rayon::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pos`
[INFO] [stderr]    --> src/lib.rs:204:13
[INFO] [stderr]     |
[INFO] [stderr] 204 |         let pos = self.column_position(column)?;
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]   --> src/row.rs:30:23
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stderr]    |                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/row.rs:30:37
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stderr]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/row_table.rs:269:56
[INFO] [stderr]     |
[INFO] [stderr] 269 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stderr]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/row_table.rs:284:40
[INFO] [stderr]     |
[INFO] [stderr] 284 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/row_table.rs:381:40
[INFO] [stderr]     |
[INFO] [stderr] 381 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_val`
[INFO] [stderr]    --> src/row_table.rs:451:13
[INFO] [stderr]     |
[INFO] [stderr] 451 |         let new_val = (new_col.to_string(), self.column_map[pos].1);
[INFO] [stderr]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `written`
[INFO] [stderr]   --> src/mmap_table.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stderr]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num_ends`
[INFO] [stderr]   --> src/mmap_table.rs:42:38
[INFO] [stderr]    |
[INFO] [stderr] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stderr]    |                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `update`
[INFO] [stderr]   --> src/mmap_table.rs:84:59
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn update_by<F: FnMut(&mut Self::RowType)>(&mut self, update: F) {
[INFO] [stderr]    |                                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_update`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]   --> src/mmap_table.rs:88:33
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn append_row<R>(&mut self, row: R) -> Result<(), TableError> where R: Row {
[INFO] [stderr]    |                                 ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column_name`
[INFO] [stderr]   --> src/mmap_table.rs:92:56
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stderr]    |                                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/mmap_table.rs:92:75
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stderr]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_col`
[INFO] [stderr]   --> src/mmap_table.rs:96:33
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stderr]    |                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_col`
[INFO] [stderr]   --> src/mmap_table.rs:96:48
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stderr]    |                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]    --> src/mmap_table.rs:131:24
[INFO] [stderr]     |
[INFO] [stderr] 131 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stderr]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mid`
[INFO] [stderr]    --> src/mmap_table.rs:151:29
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stderr]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/mmap_table.rs:182:56
[INFO] [stderr]     |
[INFO] [stderr] 182 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stderr]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read`
[INFO] [stderr]    --> src/mmap_table.rs:200:19
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stderr]     |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_read`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `written`
[INFO] [stderr]    --> src/mmap_table.rs:200:25
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stderr]     |                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num_ends`
[INFO] [stderr]    --> src/mmap_table.rs:200:34
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stderr]     |                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/mmap_table.rs:217:40
[INFO] [stderr]     |
[INFO] [stderr] 217 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/mmap_table.rs:255:40
[INFO] [stderr]     |
[INFO] [stderr] 255 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]    --> src/mmap_table.rs:258:24
[INFO] [stderr]     |
[INFO] [stderr] 258 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stderr]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mid`
[INFO] [stderr]    --> src/mmap_table.rs:281:29
[INFO] [stderr]     |
[INFO] [stderr] 281 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stderr]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `compare`
[INFO] [stderr]    --> src/mmap_table.rs:287:75
[INFO] [stderr]     |
[INFO] [stderr] 287 |     fn sort_by<F: FnMut(Self::RowType, Self::RowType) -> Ordering>(&self, compare: F) -> Result<Self::TableSliceType, TableError> {
[INFO] [stderr]     |                                                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_compare`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_col`
[INFO] [stderr]    --> src/mmap_table.rs:291:29
[INFO] [stderr]     |
[INFO] [stderr] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stderr]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_col`
[INFO] [stderr]    --> src/mmap_table.rs:291:44
[INFO] [stderr]     |
[INFO] [stderr] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stderr]     |                                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/mmap_table.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let mut mmap = unsafe { MmapMut::map_mut(&file)? };
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/lib.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |             self.append_row(row);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:168:9
[INFO] [stderr]     |
[INFO] [stderr] 168 |         csv.write_record(self.columns());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:172:13
[INFO] [stderr]     |
[INFO] [stderr] 172 | /             csv.write_record(self.columns().iter().map(|c| {
[INFO] [stderr] 173 | |                 row.get(c).as_string()
[INFO] [stderr] 174 | |             }));
[INFO] [stderr]     | |________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/row_table.rs:344:13
[INFO] [stderr]     |
[INFO] [stderr] 344 |             writeln!(f, "{:?}", self.table.lock().unwrap().rows[*row]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 53 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Error as IOError`, `Read`
[INFO] [stderr]  --> src/lib.rs:5:15
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{Error as IOError, Read};
[INFO] [stderr]   |               ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Display`, `Error as FmtError`, `Formatter`
[INFO] [stderr]  --> src/lib.rs:8:16
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fmt::{Display, Formatter, Error as FmtError};
[INFO] [stderr]   |                ^^^^^^^  ^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Hash`, `Hasher`
[INFO] [stderr]  --> src/lib.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::hash::{Hash, Hasher};
[INFO] [stderr]   |                 ^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::Ref`
[INFO] [stderr]   --> src/lib.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::cell::Ref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::FusedIterator`
[INFO] [stderr]   --> src/lib.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::iter::FusedIterator;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Index`
[INFO] [stderr]   --> src/lib.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::ops::Index;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Reader`
[INFO] [stderr]   --> src/lib.rs:16:11
[INFO] [stderr]    |
[INFO] [stderr] 16 | use csv::{Reader, Writer};
[INFO] [stderr]    |           ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/row.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]  --> src/row.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::RefCell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/row.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::Table`
[INFO] [stderr]  --> src/row.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use crate::Table;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Index`
[INFO] [stderr]  --> src/row_table.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::Index;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::hash_map::RandomState`
[INFO] [stderr]  --> src/row_table.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::hash_map::RandomState;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Map`
[INFO] [stderr]  --> src/row_table.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::iter::Map;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ByteRecord`, `ReaderBuilder`, `Trim`
[INFO] [stderr]   --> src/row_table.rs:12:33
[INFO] [stderr]    |
[INFO] [stderr] 12 | use csv::{Reader, StringRecord, ByteRecord, ReaderBuilder, Trim};
[INFO] [stderr]    |                                 ^^^^^^^^^^  ^^^^^^^^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Cursor`
[INFO] [stderr]  --> src/mmap_table.rs:5:44
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::{Error as IOError, ErrorKind, Cursor};
[INFO] [stderr]   |                                            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `MmapOptions`
[INFO] [stderr]  --> src/mmap_table.rs:9:23
[INFO] [stderr]   |
[INFO] [stderr] 9 | use memmap::{MmapMut, MmapOptions};
[INFO] [stderr]   |                       ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `chrono::Duration`
[INFO] [stderr]    --> src/mmap_table.rs:321:9
[INFO] [stderr]     |
[INFO] [stderr] 321 |     use chrono::Duration;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rayon::prelude`
[INFO] [stderr]   --> src/lib.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use rayon::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rayon::prelude`
[INFO] [stderr]   --> src/row_table.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use rayon::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pos`
[INFO] [stderr]    --> src/lib.rs:204:13
[INFO] [stderr]     |
[INFO] [stderr] 204 |         let pos = self.column_position(column)?;
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]   --> src/row.rs:30:23
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stderr]    |                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/row.rs:30:37
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn set(&mut self, column :&str, value :Value) -> Result<Value, TableError> {
[INFO] [stderr]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/row_table.rs:269:56
[INFO] [stderr]     |
[INFO] [stderr] 269 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stderr]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/row_table.rs:284:40
[INFO] [stderr]     |
[INFO] [stderr] 284 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/row_table.rs:381:40
[INFO] [stderr]     |
[INFO] [stderr] 381 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_val`
[INFO] [stderr]    --> src/row_table.rs:451:13
[INFO] [stderr]     |
[INFO] [stderr] 451 |         let new_val = (new_col.to_string(), self.column_map[pos].1);
[INFO] [stderr]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_val`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `written`
[INFO] [stderr]   --> src/mmap_table.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stderr]    |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num_ends`
[INFO] [stderr]   --> src/mmap_table.rs:42:38
[INFO] [stderr]    |
[INFO] [stderr] 42 |             let (res, read, written, num_ends) = reader.read_record(&mmap[pos..], &mut output, &mut ends);
[INFO] [stderr]    |                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `update`
[INFO] [stderr]   --> src/mmap_table.rs:84:59
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn update_by<F: FnMut(&mut Self::RowType)>(&mut self, update: F) {
[INFO] [stderr]    |                                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_update`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]   --> src/mmap_table.rs:88:33
[INFO] [stderr]    |
[INFO] [stderr] 88 |     fn append_row<R>(&mut self, row: R) -> Result<(), TableError> where R: Row {
[INFO] [stderr]    |                                 ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column_name`
[INFO] [stderr]   --> src/mmap_table.rs:92:56
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stderr]    |                                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_column_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/mmap_table.rs:92:75
[INFO] [stderr]    |
[INFO] [stderr] 92 |     fn add_column_with<F: FnMut() -> Value>(&mut self, column_name: &str, f: F) -> Result<(), TableError> {
[INFO] [stderr]    |                                                                           ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_col`
[INFO] [stderr]   --> src/mmap_table.rs:96:33
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stderr]    |                                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_col`
[INFO] [stderr]   --> src/mmap_table.rs:96:48
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn rename_column(&mut self, old_col :&str, new_col :&str) -> Result<(), TableError> {
[INFO] [stderr]    |                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]    --> src/mmap_table.rs:131:24
[INFO] [stderr]     |
[INFO] [stderr] 131 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stderr]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mid`
[INFO] [stderr]    --> src/mmap_table.rs:151:29
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stderr]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/mmap_table.rs:182:56
[INFO] [stderr]     |
[INFO] [stderr] 182 |         let pos = self.column_map.iter().position(|(c, i)| c == column);
[INFO] [stderr]     |                                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `read`
[INFO] [stderr]    --> src/mmap_table.rs:200:19
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stderr]     |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_read`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `written`
[INFO] [stderr]    --> src/mmap_table.rs:200:25
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stderr]     |                         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_written`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num_ends`
[INFO] [stderr]    --> src/mmap_table.rs:200:34
[INFO] [stderr]     |
[INFO] [stderr] 200 |         let (res, read, written, num_ends) = reader.read_record(&table.mmap[offset..], &mut output, &mut ends);
[INFO] [stderr]     |                                  ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_ends`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/mmap_table.rs:217:40
[INFO] [stderr]     |
[INFO] [stderr] 217 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/mmap_table.rs:255:40
[INFO] [stderr]     |
[INFO] [stderr] 255 |         self.column_map.iter().map(|(c,i)| c.clone()).collect()
[INFO] [stderr]     |                                        ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]    --> src/mmap_table.rs:258:24
[INFO] [stderr]     |
[INFO] [stderr] 258 |     fn group_by(&self, column: &str) -> Result<HashMap<Value, Self::TableSliceType, RandomState>, TableError> {
[INFO] [stderr]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mid`
[INFO] [stderr]    --> src/mmap_table.rs:281:29
[INFO] [stderr]     |
[INFO] [stderr] 281 |     fn split_rows_at(&self, mid: usize) -> Result<(Self::TableSliceType, Self::TableSliceType), TableError> {
[INFO] [stderr]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_mid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `compare`
[INFO] [stderr]    --> src/mmap_table.rs:287:75
[INFO] [stderr]     |
[INFO] [stderr] 287 |     fn sort_by<F: FnMut(Self::RowType, Self::RowType) -> Ordering>(&self, compare: F) -> Result<Self::TableSliceType, TableError> {
[INFO] [stderr]     |                                                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_compare`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `old_col`
[INFO] [stderr]    --> src/mmap_table.rs:291:29
[INFO] [stderr]     |
[INFO] [stderr] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stderr]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_old_col`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_col`
[INFO] [stderr]    --> src/mmap_table.rs:291:44
[INFO] [stderr]     |
[INFO] [stderr] 291 |     fn rename_column(&self, old_col :&str, new_col :&str) -> Result<Self::TableSliceType, TableError> {
[INFO] [stderr]     |                                            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_col`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/mmap_table.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let mut mmap = unsafe { MmapMut::map_mut(&file)? };
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/lib.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |             self.append_row(row);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:168:9
[INFO] [stderr]     |
[INFO] [stderr] 168 |         csv.write_record(self.columns());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:172:13
[INFO] [stderr]     |
[INFO] [stderr] 172 | /             csv.write_record(self.columns().iter().map(|c| {
[INFO] [stderr] 173 | |                 row.get(c).as_string()
[INFO] [stderr] 174 | |             }));
[INFO] [stderr]     | |________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/row_table.rs:344:13
[INFO] [stderr]     |
[INFO] [stderr] 344 |             writeln!(f, "{:?}", self.table.lock().unwrap().rows[*row]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/row_table.rs:504:9
[INFO] [stderr]     |
[INFO] [stderr] 504 |         table.filter_by(|r| { r.get("B"); true });
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/row_table.rs:506:31
[INFO] [stderr]     |
[INFO] [stderr] 506 |         table.update_by(|r| { r.set("B", Value::Integer(7));} );
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 56 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.44s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/large_table-5a198447cf271206)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test row_table::tests::to_from_csv ... ok
[INFO] [stdout] test value::test::float ... ok
[INFO] [stdout] test value::test::date_time ... ok
[INFO] [stdout] test value::test::integer ... ok
[INFO] [stdout] test mmap_table::tests::new ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- mmap_table::tests::new stdout ----
[INFO] [stdout] thread 'mmap_table::tests::new' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/mmap_table.rs:335:79
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x56105980cc40 - std::backtrace_rs::backtrace::libunwind::trace::h34055254b57d8e79
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x56105980cc40 - std::backtrace_rs::backtrace::trace_unsynchronized::h8f1e3fbd9afff6ec
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x56105980cc40 - std::sys_common::backtrace::_print_fmt::h3a99a796b770c360
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x56105980cc40 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h32d1f94a80615d18
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x56105983113c - core::fmt::write::h306731c068f7162c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/fmt/mod.rs:1110:17
[INFO] [stdout]    5:     0x561059809b55 - std::io::Write::write_fmt::h87f19b0a2cd190bc
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/io/mod.rs:1588:15
[INFO] [stdout]    6:     0x56105980edab - std::sys_common::backtrace::_print::h5abaa2601a852287
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x56105980edab - std::sys_common::backtrace::print::h8d81445442bb638f
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x56105980edab - std::panicking::default_hook::{{closure}}::hcfe804496a9fa747
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x56105980e8bc - std::panicking::default_hook::hbea8e3ccf2ba8901
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:222:9
[INFO] [stdout]   10:     0x56105980f474 - std::panicking::rust_panic_with_hook::h7ee9e1a2d0f8975a
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x56105980ef57 - std::panicking::begin_panic_handler::{{closure}}::h8ab3b4491718b2c7
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x56105980d13c - std::sys_common::backtrace::__rust_end_short_backtrace::hd489062ffa586a9f
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x56105980eeb9 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x56105970d7d1 - core::panicking::panic_fmt::hca6330e3e14086b4
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x56105970d8c3 - core::result::unwrap_failed::h6160d2b4bfbb0e87
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/result.rs:1355:5
[INFO] [stdout]   16:     0x561059723231 - core::result::Result<T,E>::unwrap::h32e1cd7bb4242f0b
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/result.rs:1037:23
[INFO] [stdout]   17:     0x5610597186da - large_table::mmap_table::tests::new::hc25a8613be25f3cb
[INFO] [stdout]                                at /opt/rustwide/workdir/src/mmap_table.rs:335:21
[INFO] [stdout]   18:     0x56105971866a - large_table::mmap_table::tests::new::{{closure}}::he5d5188ad0327989
[INFO] [stdout]                                at /opt/rustwide/workdir/src/mmap_table.rs:331:5
[INFO] [stdout]   19:     0x561059721e6e - core::ops::function::FnOnce::call_once::h0203aa6216482717
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   20:     0x56105974f413 - core::ops::function::FnOnce::call_once::h152e7e439ff59e19
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   21:     0x56105974f413 - test::__rust_begin_short_backtrace::h0908f3b1fdbb72ab
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:577:5
[INFO] [stdout]   22:     0x56105974ded0 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf6d2a51e5587546c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   23:     0x56105974ded0 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8af660f3a89ef593
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
[INFO] [stdout]   24:     0x56105974ded0 - std::panicking::try::do_call::hd36aef60f84b6d36
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
[INFO] [stdout]   25:     0x56105974ded0 - std::panicking::try::h9932b4480e69817c
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
[INFO] [stdout]   26:     0x56105974ded0 - std::panic::catch_unwind::h6aa177099cfff5f8
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
[INFO] [stdout]   27:     0x56105974ded0 - test::run_test_in_process::h5884d6f2d99e20c3
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:600:18
[INFO] [stdout]   28:     0x56105974ded0 - test::run_test::run_test_inner::{{closure}}::h6fdc58c6d5f5b6e3
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:492:39
[INFO] [stdout]   29:     0x561059727582 - test::run_test::run_test_inner::{{closure}}::h408365d67a78ade8
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/test/src/lib.rs:519:37
[INFO] [stdout]   30:     0x561059727582 - std::sys_common::backtrace::__rust_begin_short_backtrace::hb560b77c4f701523
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stdout]   31:     0x56105972b138 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hf2e7831dad93c597
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/mod.rs:481:17
[INFO] [stdout]   32:     0x56105972b138 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd2e08783d8be4d02
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
[INFO] [stdout]   33:     0x56105972b138 - std::panicking::try::do_call::h062597b7acfd6b82
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
[INFO] [stdout]   34:     0x56105972b138 - std::panicking::try::h0d7b79db04c14552
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
[INFO] [stdout]   35:     0x56105972b138 - std::panic::catch_unwind::hb01a0b5e7c8cd43b
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
[INFO] [stdout]   36:     0x56105972b138 - std::thread::Builder::spawn_unchecked::{{closure}}::h5bde48cc887e0d1e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/mod.rs:480:30
[INFO] [stdout]   37:     0x56105972b138 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h745ea30807a29e55
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   38:     0x561059813f57 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7ece6cfefaff1005
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   39:     0x561059813f57 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hb8b48e55c21f193e
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/boxed.rs:1575:9
[INFO] [stdout]   40:     0x561059813f57 - std::sys::unix::thread::Thread::new::thread_start::h8c7c4450dba62914
[INFO] [stdout]                                at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/sys/unix/thread.rs:71:17
[INFO] [stdout]   41:     0x7f7e5181d609 - start_thread
[INFO] [stdout]   42:     0x7f7e515ef293 - clone
[INFO] [stdout]   43:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     mmap_table::tests::new
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 4 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.41s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--lib'
[INFO] running `Command { std: "docker" "inspect" "52de232ad8016978ea876278ab96021781ed65bd4a6e7babab6dff4a64e1bd3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52de232ad8016978ea876278ab96021781ed65bd4a6e7babab6dff4a64e1bd3f", kill_on_drop: false }`
[INFO] [stdout] 52de232ad8016978ea876278ab96021781ed65bd4a6e7babab6dff4a64e1bd3f
