[INFO] fetching crate rsdbc-core 0.0.1...
[INFO] building rsdbc-core-0.0.1 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate rsdbc-core 0.0.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate rsdbc-core 0.0.1
[INFO] finished tweaking crates.io crate rsdbc-core 0.0.1
[INFO] tweaked toml for crates.io crate rsdbc-core 0.0.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rsdbc-core 0.0.1 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 50 packages to latest compatible versions
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 849bff42a2d79441854e08d39795a6b371244761d6b95c384943e1873638ed4f
[INFO] running `Command { std: "docker" "start" "-a" "849bff42a2d79441854e08d39795a6b371244761d6b95c384943e1873638ed4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "849bff42a2d79441854e08d39795a6b371244761d6b95c384943e1873638ed4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "849bff42a2d79441854e08d39795a6b371244761d6b95c384943e1873638ed4f", kill_on_drop: false }`
[INFO] [stdout] 849bff42a2d79441854e08d39795a6b371244761d6b95c384943e1873638ed4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1793375960dea9e0af5c8e315eaec816bd2b6b2bc221703ce2efce9b6c17f458
[INFO] running `Command { std: "docker" "start" "-a" "1793375960dea9e0af5c8e315eaec816bd2b6b2bc221703ce2efce9b6c17f458", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling url v2.5.7
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling rsdbc-core v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `url::Url`
[INFO] [stdout]  --> src/error.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use url::Url;
[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 import: `Borrow`
[INFO] [stdout]  --> src/lib.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, Cow};
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `columns`
[INFO] [stdout]    --> src/connection.rs:643:43
[INFO] [stdout]     |
[INFO] [stdout] 643 |     fn return_generated_values(&mut self, columns: &[&str]) -> &mut Self where Self: Sized { //Box<dyn A>
[INFO] [stdout]     |                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_columns`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rows`
[INFO] [stdout]    --> src/connection.rs:654:30
[INFO] [stdout]     |
[INFO] [stdout] 654 |     fn fetch_size(&mut self, rows: u32) -> &mut Self where Self: Sized { //Box<dyn A>
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_rows`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]    --> src/lib.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn parse_connection(url: &str) {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:437:26
[INFO] [stdout]     |
[INFO] [stdout] 437 |     fn table_name(&self, i: u64) -> String {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]    --> src/connection.rs:513:13
[INFO] [stdout]     |
[INFO] [stdout] 513 | fn validate(url: &str) -> Result<()> {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:429:25
[INFO] [stdout]     |
[INFO] [stdout] 429 |     fn precision(&self, i: u64) -> u64 {
[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/lib.rs:433:27
[INFO] [stdout]     |
[INFO] [stdout] 433 |     fn schema_name(&self, i: u64) -> String {
[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/lib.rs:425:32
[INFO] [stdout]     |
[INFO] [stdout] 425 |     fn column_type_name(&self, i: u64) -> String {
[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/lib.rs:445:28
[INFO] [stdout]     |
[INFO] [stdout] 445 |     fn is_read_only(&self, i: u64) -> String {
[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/lib.rs:441:27
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn is_nullable(&self, i: u64) -> String {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `ISOLATION_LEVEL`, `READ_ONLY`, `NAME`, and `LOCK_WAIT_TIMEOUT` are never used
[INFO] [stdout]   --> src/lib.rs:52:11
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl TransactionOptions {
[INFO] [stdout]    | ----------------------- associated constants in this implementation
[INFO] [stdout] 51 |     /// Isolation level requested for the transaction.
[INFO] [stdout] 52 |     const ISOLATION_LEVEL: &'static str = "isolation_level";
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     const READ_ONLY: &'static str = "read_only";
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     const NAME: &'static str = "name";
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     const LOCK_WAIT_TIMEOUT: &'static str = "lock_wait_timeout";
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_connection` is never used
[INFO] [stdout]    --> src/lib.rs:148:4
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn parse_connection(url: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/connection.rs:554:19
[INFO] [stdout]     |
[INFO] [stdout] 553 | impl IsolationLevel {
[INFO] [stdout]     | ------------------- associated function in this implementation
[INFO] [stdout] 554 |     pub(crate) fn new(raw: &str) -> Result<IsolationLevel> {
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.11s
[INFO] running `Command { std: "docker" "inspect" "1793375960dea9e0af5c8e315eaec816bd2b6b2bc221703ce2efce9b6c17f458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1793375960dea9e0af5c8e315eaec816bd2b6b2bc221703ce2efce9b6c17f458", kill_on_drop: false }`
[INFO] [stdout] 1793375960dea9e0af5c8e315eaec816bd2b6b2bc221703ce2efce9b6c17f458
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 685f994525c6ed16cced0f9ae710e47d1050af82fcb22e39828afdf31dad8b1c
[INFO] running `Command { std: "docker" "start" "-a" "685f994525c6ed16cced0f9ae710e47d1050af82fcb22e39828afdf31dad8b1c", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `url::Url`
[INFO] [stdout]  --> src/error.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use url::Url;
[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 import: `Borrow`
[INFO] [stdout]  --> src/lib.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, Cow};
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rsdbc-core v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `columns`
[INFO] [stdout]    --> src/connection.rs:643:43
[INFO] [stdout]     |
[INFO] [stdout] 643 |     fn return_generated_values(&mut self, columns: &[&str]) -> &mut Self where Self: Sized { //Box<dyn A>
[INFO] [stdout]     |                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_columns`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rows`
[INFO] [stdout]    --> src/connection.rs:654:30
[INFO] [stdout]     |
[INFO] [stdout] 654 |     fn fetch_size(&mut self, rows: u32) -> &mut Self where Self: Sized { //Box<dyn A>
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_rows`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]    --> src/lib.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn parse_connection(url: &str) {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:437:26
[INFO] [stdout]     |
[INFO] [stdout] 437 |     fn table_name(&self, i: u64) -> String {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]    --> src/connection.rs:513:13
[INFO] [stdout]     |
[INFO] [stdout] 513 | fn validate(url: &str) -> Result<()> {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:429:25
[INFO] [stdout]     |
[INFO] [stdout] 429 |     fn precision(&self, i: u64) -> u64 {
[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/lib.rs:433:27
[INFO] [stdout]     |
[INFO] [stdout] 433 |     fn schema_name(&self, i: u64) -> String {
[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/lib.rs:425:32
[INFO] [stdout]     |
[INFO] [stdout] 425 |     fn column_type_name(&self, i: u64) -> String {
[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/lib.rs:445:28
[INFO] [stdout]     |
[INFO] [stdout] 445 |     fn is_read_only(&self, i: u64) -> String {
[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/lib.rs:441:27
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn is_nullable(&self, i: u64) -> String {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `ISOLATION_LEVEL`, `READ_ONLY`, `NAME`, and `LOCK_WAIT_TIMEOUT` are never used
[INFO] [stdout]   --> src/lib.rs:52:11
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl TransactionOptions {
[INFO] [stdout]    | ----------------------- associated constants in this implementation
[INFO] [stdout] 51 |     /// Isolation level requested for the transaction.
[INFO] [stdout] 52 |     const ISOLATION_LEVEL: &'static str = "isolation_level";
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     const READ_ONLY: &'static str = "read_only";
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     const NAME: &'static str = "name";
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     const LOCK_WAIT_TIMEOUT: &'static str = "lock_wait_timeout";
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_connection` is never used
[INFO] [stdout]    --> src/lib.rs:148:4
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn parse_connection(url: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/connection.rs:554:19
[INFO] [stdout]     |
[INFO] [stdout] 553 | impl IsolationLevel {
[INFO] [stdout]     | ------------------- associated function in this implementation
[INFO] [stdout] 554 |     pub(crate) fn new(raw: &str) -> Result<IsolationLevel> {
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Borrow`
[INFO] [stdout]  --> src/lib.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, Cow};
[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 import: `url::Url`
[INFO] [stdout]  --> src/error.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use url::Url;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::RsdbcErrors`
[INFO] [stdout]    --> src/connection.rs:686:9
[INFO] [stdout]     |
[INFO] [stdout] 686 |     use crate::RsdbcErrors;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]    --> src/lib.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn parse_connection(url: &str) {
[INFO] [stdout]     |                     ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:425:32
[INFO] [stdout]     |
[INFO] [stdout] 425 |     fn column_type_name(&self, i: u64) -> String {
[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/lib.rs:429:25
[INFO] [stdout]     |
[INFO] [stdout] 429 |     fn precision(&self, i: u64) -> u64 {
[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/lib.rs:433:27
[INFO] [stdout]     |
[INFO] [stdout] 433 |     fn schema_name(&self, i: u64) -> String {
[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/lib.rs:437:26
[INFO] [stdout]     |
[INFO] [stdout] 437 |     fn table_name(&self, i: u64) -> String {
[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/lib.rs:441:27
[INFO] [stdout]     |
[INFO] [stdout] 441 |     fn is_nullable(&self, i: u64) -> String {
[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/lib.rs:445:28
[INFO] [stdout]     |
[INFO] [stdout] 445 |     fn is_read_only(&self, i: u64) -> String {
[INFO] [stdout]     |                            ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `columns`
[INFO] [stdout]    --> src/connection.rs:643:43
[INFO] [stdout]     |
[INFO] [stdout] 643 |     fn return_generated_values(&mut self, columns: &[&str]) -> &mut Self where Self: Sized { //Box<dyn A>
[INFO] [stdout]     |                                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_columns`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rows`
[INFO] [stdout]    --> src/connection.rs:654:30
[INFO] [stdout]     |
[INFO] [stdout] 654 |     fn fetch_size(&mut self, rows: u32) -> &mut Self where Self: Sized { //Box<dyn A>
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_rows`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `url`
[INFO] [stdout]    --> src/connection.rs:513:13
[INFO] [stdout]     |
[INFO] [stdout] 513 | fn validate(url: &str) -> Result<()> {
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_url`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constants `ISOLATION_LEVEL`, `READ_ONLY`, `NAME`, and `LOCK_WAIT_TIMEOUT` are never used
[INFO] [stdout]   --> src/lib.rs:52:11
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl TransactionOptions {
[INFO] [stdout]    | ----------------------- associated constants in this implementation
[INFO] [stdout] 51 |     /// Isolation level requested for the transaction.
[INFO] [stdout] 52 |     const ISOLATION_LEVEL: &'static str = "isolation_level";
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     const READ_ONLY: &'static str = "read_only";
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     const NAME: &'static str = "name";
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     const LOCK_WAIT_TIMEOUT: &'static str = "lock_wait_timeout";
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/connection.rs:554:19
[INFO] [stdout]     |
[INFO] [stdout] 553 | impl IsolationLevel {
[INFO] [stdout]     | ------------------- associated function in this implementation
[INFO] [stdout] 554 |     pub(crate) fn new(raw: &str) -> Result<IsolationLevel> {
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_connection` is never used
[INFO] [stdout]    --> src/lib.rs:148:4
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn parse_connection(url: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "685f994525c6ed16cced0f9ae710e47d1050af82fcb22e39828afdf31dad8b1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "685f994525c6ed16cced0f9ae710e47d1050af82fcb22e39828afdf31dad8b1c", kill_on_drop: false }`
[INFO] [stdout] 685f994525c6ed16cced0f9ae710e47d1050af82fcb22e39828afdf31dad8b1c