[INFO] cloning repository https://github.com/arhandev11/database-engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arhandev11/database-engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farhandev11%2Fdatabase-engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farhandev11%2Fdatabase-engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a78a50d1721a984bc2e4de3bf5e3be6bcc2ffdb8
[INFO] checking arhandev11/database-engine/a78a50d1721a984bc2e4de3bf5e3be6bcc2ffdb8 against 3d50c25bc66853bf0ad205529d0f305a1d841b5e for pr-159598
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farhandev11%2Fdatabase-engine" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/arhandev11/database-engine
[INFO] finished tweaking git repo https://github.com/arhandev11/database-engine
[INFO] tweaked toml for git repo https://github.com/arhandev11/database-engine written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/arhandev11/database-engine on toolchain 3d50c25bc66853bf0ad205529d0f305a1d841b5e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3d50c25bc66853bf0ad205529d0f305a1d841b5e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/arhandev11/database-engine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3d50c25bc66853bf0ad205529d0f305a1d841b5e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "inspect" "f3ff47c07c505acb7b582effb63dbf7ecd1ce555d24f40da09c217bda0635c64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f3ff47c07c505acb7b582effb63dbf7ecd1ce555d24f40da09c217bda0635c64" "/opt/rustwide/cargo-home/bin/cargo" "+3d50c25bc66853bf0ad205529d0f305a1d841b5e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3ff47c07c505acb7b582effb63dbf7ecd1ce555d24f40da09c217bda0635c64", kill_on_drop: false }`
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[INFO] [stdout] warning: unused imports: `ErrorKind`, `HashSet`, `Write`, `fs::File`, and `result`
[INFO] [stdout]  --> src/main.rs:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::{HashMap, HashSet},
[INFO] [stdout]   |                            ^^^^^^^
[INFO] [stdout] 3 |     fs::File,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 4 |     future::pending,
[INFO] [stdout] 5 |     io::{ErrorKind, Write},
[INFO] [stdout]   |          ^^^^^^^^^  ^^^^^
[INFO] [stdout] 6 |     result,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DataType`, `InputDataEnum`, `Table`, `column::Column`, `schema::Schema`, `self`, and `self`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     column::Column,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     schema::Schema,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 14 |     table::{self, Table},
[INFO] [stdout]    |             ^^^^  ^^^^^
[INFO] [stdout] 15 |     test_interface::TestDatabaseInterface,
[INFO] [stdout] 16 |     utils::{self, DataType, InputDataEnum},
[INFO] [stdout]    |             ^^^^  ^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `interface`
[INFO] [stdout]   --> src/main.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | use zbus::{interface, Connection, Result};
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `collections::HashMap`, `fmt::format`, `fs::File`, and `result`
[INFO] [stdout]  --> src/database/cell.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::HashMap,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 |     fmt::format,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 4 |     fs::File,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 5 |     io::{Read, Write},
[INFO] [stdout]   |          ^^^^  ^^^^^
[INFO] [stdout] 6 |     result,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `collections::HashMap`, `fmt::format`, `fs::File`, and `result`
[INFO] [stdout]  --> src/database/column.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::HashMap,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 |     fmt::format,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 4 |     fs::File,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 5 |     io::{Read, Write},
[INFO] [stdout]   |          ^^^^  ^^^^^
[INFO] [stdout] 6 |     result,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/database/database_interface.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     io::{Error, ErrorKind, Read},
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DataType` and `column::Column`
[INFO] [stdout]   --> src/database/database_interface.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout]  8 |     column::Column,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 |     utils::{parse_new_column, DataType, InputDataEnum},
[INFO] [stdout]    |                               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> src/database/schema.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |     table::{self, Table},
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DataType`, `InputDataEnum`, `column::Column`, `parse_new_column`, `schema::Schema`, and `table::Table`
[INFO] [stdout]  --> src/database/test_interface.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     column::Column,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 5 |     database_interface::DatabaseInterface,
[INFO] [stdout] 6 |     schema::Schema,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 7 |     table::Table,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 8 |     utils::{parse_new_column, DataType, InputDataEnum},
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cell::Cell` and `table::Table`
[INFO] [stdout]  --> src/database/utils.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::database::{cell::Cell, column::Column, table::Table, utils};
[INFO] [stdout]   |                       ^^^^^^^^^^                  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ErrorKind`, `HashMap`, `HashSet`, `Write`, `fs::File`, and `result`
[INFO] [stdout]  --> src/main.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::{HashMap, HashSet},
[INFO] [stdout]   |                   ^^^^^^^  ^^^^^^^
[INFO] [stdout] 3 |     fs::File,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 4 |     future::pending,
[INFO] [stdout] 5 |     io::{ErrorKind, Write},
[INFO] [stdout]   |          ^^^^^^^^^  ^^^^^
[INFO] [stdout] 6 |     result,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DataType`, `InputDataEnum`, `Table`, `column::Column`, `schema::Schema`, `self`, `self`, and `test_interface::TestDatabaseInterface`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     column::Column,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     schema::Schema,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 14 |     table::{self, Table},
[INFO] [stdout]    |             ^^^^  ^^^^^
[INFO] [stdout] 15 |     test_interface::TestDatabaseInterface,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 16 |     utils::{self, DataType, InputDataEnum},
[INFO] [stdout]    |             ^^^^  ^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `interface`
[INFO] [stdout]   --> src/main.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | use zbus::{interface, Connection, Result};
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `collections::HashMap`, `fmt::format`, `fs::File`, and `result`
[INFO] [stdout]  --> src/database/cell.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::HashMap,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 |     fmt::format,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 4 |     fs::File,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 5 |     io::{Read, Write},
[INFO] [stdout]   |          ^^^^  ^^^^^
[INFO] [stdout] 6 |     result,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `collections::HashMap`, `fmt::format`, `fs::File`, and `result`
[INFO] [stdout]  --> src/database/column.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     collections::HashMap,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 |     fmt::format,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 4 |     fs::File,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 5 |     io::{Read, Write},
[INFO] [stdout]   |          ^^^^  ^^^^^
[INFO] [stdout] 6 |     result,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/database/database_interface.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     io::{Error, ErrorKind, Read},
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DataType` and `column::Column`
[INFO] [stdout]   --> src/database/database_interface.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout]  8 |     column::Column,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 |     utils::{parse_new_column, DataType, InputDataEnum},
[INFO] [stdout]    |                               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> src/database/schema.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |     table::{self, Table},
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DataType`, `InputDataEnum`, `column::Column`, `parse_new_column`, `schema::Schema`, and `table::Table`
[INFO] [stdout]  --> src/database/test_interface.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     column::Column,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 5 |     database_interface::DatabaseInterface,
[INFO] [stdout] 6 |     schema::Schema,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 7 |     table::Table,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 8 |     utils::{parse_new_column, DataType, InputDataEnum},
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cell::Cell` and `table::Table`
[INFO] [stdout]  --> src/database/utils.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::database::{cell::Cell, column::Column, table::Table, utils};
[INFO] [stdout]   |                       ^^^^^^^^^^                  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/database/column.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         for i in 0..col_row_len_usize {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `build_index`
[INFO] [stdout]   --> src/database/database_interface.rs:76:21
[INFO] [stdout]    |
[INFO] [stdout] 76 |                 let build_index = schema.build_index();
[INFO] [stdout]    |                     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_build_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/database/schema.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         for i in 0..table_len_usize {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/database/schema.rs:107:27
[INFO] [stdout]     |
[INFO] [stdout] 107 |                     .map(|x| Cell {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/database/schema.rs:99:27
[INFO] [stdout]    |
[INFO] [stdout] 99 |                     .map(|x| Cell {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/database/schema.rs:411:17
[INFO] [stdout]     |
[INFO] [stdout] 411 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/database/table.rs:329:13
[INFO] [stdout]     |
[INFO] [stdout] 329 |         for i in 0..table_column_len_usize {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/database/test_interface.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let mut db_interface = DatabaseInterface {
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/database/column.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         for i in 0..col_row_len_usize {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `build_index`
[INFO] [stdout]   --> src/database/database_interface.rs:76:21
[INFO] [stdout]    |
[INFO] [stdout] 76 |                 let build_index = schema.build_index();
[INFO] [stdout]    |                     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_build_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/database/utils.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     for j in 0..length {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/database/utils.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |     for j in 0..length {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/database/schema.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         for i in 0..table_len_usize {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/database/schema.rs:107:27
[INFO] [stdout]     |
[INFO] [stdout] 107 |                     .map(|x| Cell {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/database/schema.rs:99:27
[INFO] [stdout]    |
[INFO] [stdout] 99 |                     .map(|x| Cell {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/database/schema.rs:411:17
[INFO] [stdout]     |
[INFO] [stdout] 411 |             Err(err) => {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/database/table.rs:329:13
[INFO] [stdout]     |
[INFO] [stdout] 329 |         for i in 0..table_column_len_usize {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/database/test_interface.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let mut db_interface = DatabaseInterface {
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/database/utils.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     for j in 0..length {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/database/utils.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |     for j in 0..length {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_column` is never used
[INFO] [stdout]   --> src/database/column.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl Column {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn print_column(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `show_databases` is never used
[INFO] [stdout]   --> src/database/database_interface.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl DatabaseInterface {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 20 |     pub fn show_databases(&self) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_type`, `get_data_by_column`, `add_data_column`, and `name_to_bytes` are never used
[INFO] [stdout]    --> src/database/table.rs:16:8
[INFO] [stdout]     |
[INFO] [stdout]  15 | impl Table {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout]  16 |     fn get_type(&self, name: String) -> DataType {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  25 |     fn get_data_by_column(&self) -> HashMap<String, Vec<InputDataEnum>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     pub fn add_data_column(&mut self, name: String, input: InputDataEnum) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 342 |     pub fn name_to_bytes(&self) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated functions are never used
[INFO] [stdout]    --> src/database/test_interface.rs:14:12
[INFO] [stdout]     |
[INFO] [stdout]  13 | impl TestDatabaseInterface {
[INFO] [stdout]     | -------------------------- associated functions in this implementation
[INFO] [stdout]  14 |     pub fn test_show_database() -> Vec<String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  68 |     pub fn test_drop_database(database_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  82 |     pub fn test_list_table(database_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     pub fn test_create_table_with_column(database_name: String, table_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |     pub fn test_drop_table(database_name: String, table_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 197 |     pub fn test_list_column_on_table(database_name: String, table_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 214 |     pub fn test_delete_column_on_table(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 349 |     pub fn test_create_join_data() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Null` is never constructed
[INFO] [stdout]   --> src/database/utils.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub enum DataType {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 10 |     Null,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_array_to_bytes` is never used
[INFO] [stdout]   --> src/database/utils.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn string_array_to_bytes(words: Vec<String>) -> Vec<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `integer_array_to_bytes` is never used
[INFO] [stdout]   --> src/database/utils.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn integer_array_to_bytes(numbers: Vec<isize>) -> Vec<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes_to_integer_array` is never used
[INFO] [stdout]   --> src/database/utils.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn bytes_to_integer_array(buf_str: &mut Vec<u8>, length: usize) -> Vec<isize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes_to_string_array` is never used
[INFO] [stdout]   --> src/database/utils.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn bytes_to_string_array(buf_str: &mut Vec<u8>, length: usize) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/database/schema.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         self.clear_index();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let _ = self.clear_index();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/database/schema.rs:352:9
[INFO] [stdout]     |
[INFO] [stdout] 352 |         file.read_to_end(&mut buf);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 352 |         let _ = file.read_to_end(&mut buf);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]   --> src/database/cell.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Cell {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 17 |     pub fn print(&self) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_column` is never used
[INFO] [stdout]   --> src/database/column.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl Column {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn print_column(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `show_databases`, `get_data`, `search_data`, `join_table`, and `print` are never used
[INFO] [stdout]    --> src/database/database_interface.rs:20:12
[INFO] [stdout]     |
[INFO] [stdout]  19 | impl DatabaseInterface {
[INFO] [stdout]     | ---------------------- methods in this implementation
[INFO] [stdout]  20 |     pub fn show_databases(&self) -> Vec<String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 226 |     pub fn get_data(&mut self, table_name: &String) -> Vec<HashMap<String, InputDataEnum>> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 238 |     pub fn search_data(
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 294 |     pub fn join_table(
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 339 |     pub fn print(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/database/schema.rs:182:12
[INFO] [stdout]     |
[INFO] [stdout]  20 | impl Schema {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 182 |     pub fn get_data(&mut self, table_name: String) -> Vec<HashMap<String, InputDataEnum>> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 188 |     pub fn search_data(
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 218 |     pub fn join_table(
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 237 |     pub fn left_right_join_table(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 299 |     pub fn join_inner_table(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 364 |     pub fn save_index(
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 389 |     pub fn print(&self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/database/table.rs:16:8
[INFO] [stdout]     |
[INFO] [stdout]  15 | impl Table {
[INFO] [stdout]     | ---------- methods in this implementation
[INFO] [stdout]  16 |     fn get_type(&self, name: String) -> DataType {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  25 |     fn get_data_by_column(&self) -> HashMap<String, Vec<InputDataEnum>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  42 |     pub fn get_data(&self) -> Vec<HashMap<String, InputDataEnum>> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  56 |     fn get_data_by_index(&self, index: usize) -> HashMap<String, InputDataEnum> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  65 |     pub fn search_by_column(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |     pub fn print(&self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     pub fn add_data_column(&mut self, name: String, input: InputDataEnum) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 342 |     pub fn name_to_bytes(&self) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TestDatabaseInterface` is never constructed
[INFO] [stdout]   --> src/database/test_interface.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct TestDatabaseInterface {}
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated functions are never used
[INFO] [stdout]    --> src/database/test_interface.rs:14:12
[INFO] [stdout]     |
[INFO] [stdout]  13 | impl TestDatabaseInterface {
[INFO] [stdout]     | -------------------------- associated functions in this implementation
[INFO] [stdout]  14 |     pub fn test_show_database() -> Vec<String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  23 |     pub fn print(database_name: String) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  40 |     pub fn test_select_database(database_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  54 |     pub fn test_create_database(database_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  68 |     pub fn test_drop_database(database_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  82 |     pub fn test_list_table(database_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  99 |     pub fn test_create_table(database_name: String, table_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     pub fn test_create_table_with_column(database_name: String, table_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |     pub fn test_drop_table(database_name: String, table_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |     pub fn test_add_column(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 197 |     pub fn test_list_column_on_table(database_name: String, table_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 214 |     pub fn test_delete_column_on_table(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 235 |     pub fn test_add_data(database_name: String, table_name: String, data: HashMap<String, String>) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 259 |     pub fn test_get_data(database_name: String, table_name: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 275 |     pub fn test_search_data(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 296 |     pub fn test_update_data(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 323 |     pub fn test_delete_data(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 349 |     pub fn test_create_join_data() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 513 |     pub fn test_join_table(
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Null` is never constructed
[INFO] [stdout]   --> src/database/utils.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub enum DataType {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 10 |     Null,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string_array_to_bytes` is never used
[INFO] [stdout]   --> src/database/utils.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn string_array_to_bytes(words: Vec<String>) -> Vec<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `integer_array_to_bytes` is never used
[INFO] [stdout]   --> src/database/utils.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn integer_array_to_bytes(numbers: Vec<isize>) -> Vec<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes_to_integer_array` is never used
[INFO] [stdout]   --> src/database/utils.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn bytes_to_integer_array(buf_str: &mut Vec<u8>, length: usize) -> Vec<isize> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes_to_string_array` is never used
[INFO] [stdout]   --> src/database/utils.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn bytes_to_string_array(buf_str: &mut Vec<u8>, length: usize) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/database/schema.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         self.clear_index();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let _ = self.clear_index();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/database/schema.rs:352:9
[INFO] [stdout]     |
[INFO] [stdout] 352 |         file.read_to_end(&mut buf);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 352 |         let _ = file.read_to_end(&mut buf);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nix v0.29.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 8`
[INFO] running `Command { std: "docker" "inspect" "f3ff47c07c505acb7b582effb63dbf7ecd1ce555d24f40da09c217bda0635c64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3ff47c07c505acb7b582effb63dbf7ecd1ce555d24f40da09c217bda0635c64", kill_on_drop: false }`
[INFO] [stdout] f3ff47c07c505acb7b582effb63dbf7ecd1ce555d24f40da09c217bda0635c64
