[INFO] fetching crate rustlab 0.1.0...
[INFO] testing rustlab-0.1.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate rustlab 0.1.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate rustlab 0.1.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustlab 0.1.0
[INFO] finished tweaking crates.io crate rustlab 0.1.0
[INFO] tweaked toml for crates.io crate rustlab 0.1.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate rustlab 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7a8c8699e18394b622a436bf3b24a14ab945fd84c07a7b20b4a50cd8662096d
[INFO] running `Command { std: "docker" "start" "-a" "a7a8c8699e18394b622a436bf3b24a14ab945fd84c07a7b20b4a50cd8662096d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7a8c8699e18394b622a436bf3b24a14ab945fd84c07a7b20b4a50cd8662096d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7a8c8699e18394b622a436bf3b24a14ab945fd84c07a7b20b4a50cd8662096d", kill_on_drop: false }`
[INFO] [stdout] a7a8c8699e18394b622a436bf3b24a14ab945fd84c07a7b20b4a50cd8662096d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 944be37f7acf7a5670cd5ccbcf60e74b8d179416b3a9ed175533717a7b7fe5f7
[INFO] running `Command { std: "docker" "start" "-a" "944be37f7acf7a5670cd5ccbcf60e74b8d179416b3a9ed175533717a7b7fe5f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustlab v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/hashmap_base.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_i32`
[INFO] [stdout]  --> src/generic_base.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn largest_i32(list: &[i32]) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest`
[INFO] [stdout]   --> src/generic_base.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn largest<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Option`
[INFO] [stdout]   --> src/generic_base.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum Option<T> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Result`
[INFO] [stdout]   --> src/generic_base.rs:26:6
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Result<T, E> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_x`
[INFO] [stdout]   --> src/generic_base.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn get_x(&self) -> &T {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_y`
[INFO] [stdout]   --> src/generic_base.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn get_y(&self) -> &T {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point2`
[INFO] [stdout]   --> src/generic_base.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Point2<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `creat_point`
[INFO] [stdout]   --> src/generic_base.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn creat_point<V, W>(self, other: Point2<V, W>) -> Point2<T, W> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Dog`
[INFO] [stdout]  --> src/struct_base.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Dog {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `square`
[INFO] [stdout]  --> src/fn_base.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn square<T: Mul<T, Output = T>>(x: T, y: T) -> T {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gcd`
[INFO] [stdout]  --> src/fn_base.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn gcd(a: u32, b: u32) -> u32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show`
[INFO] [stdout]   --> src/fn_base.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn show(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_debug`
[INFO] [stdout]   --> src/generic_bound.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn print_debug<T: Debug>(t: &T) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `area`
[INFO] [stdout]   --> src/generic_bound.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn area<T: HasArea>(t: &T) -> f64 { t.area() }
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Turkey`
[INFO] [stdout]   --> src/generic_bound.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct Turkey;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `red`
[INFO] [stdout]   --> src/generic_bound.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn red<T: Red>(_: &T)   -> &'static str { "red" }
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `blue`
[INFO] [stdout]   --> src/generic_bound.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn blue<T: Blue>(_: &T) -> &'static str { "blue" }
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/generic_bound.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compare_prints`
[INFO] [stdout]   --> src/generic_bound.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn compare_prints<T: Debug + Display>(t: &T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compare_types`
[INFO] [stdout]   --> src/generic_bound.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn compare_types<T: Debug, U: Debug>(t: &T, u: &U) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Val`
[INFO] [stdout]  --> src/generic_impl.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Val {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `GenVal`
[INFO] [stdout]  --> src/generic_impl.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct GenVal<T> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/generic_impl.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn value(&self) -> &f64 { &self.val }
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/generic_impl.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn value(&self) -> &T { &self.gen_val }
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Empty`
[INFO] [stdout]  --> src/trait_test.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Empty;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Null`
[INFO] [stdout]  --> src/trait_test.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Null;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "944be37f7acf7a5670cd5ccbcf60e74b8d179416b3a9ed175533717a7b7fe5f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "944be37f7acf7a5670cd5ccbcf60e74b8d179416b3a9ed175533717a7b7fe5f7", kill_on_drop: false }`
[INFO] [stdout] 944be37f7acf7a5670cd5ccbcf60e74b8d179416b3a9ed175533717a7b7fe5f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20d71bba34df8f6801593721919d86f7abf2ae0adeebfd3a9348f3bcac9b1b62
[INFO] running `Command { std: "docker" "start" "-a" "20d71bba34df8f6801593721919d86f7abf2ae0adeebfd3a9348f3bcac9b1b62", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustlab v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]  --> src/option_base.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use super::*;
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]  --> src/string_base.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use super::*;
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]  --> src/struct_base.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     use super::*;
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/struct_base.rs:56:20
[INFO] [stdout]    |
[INFO] [stdout] 56 |         struct A {};
[INFO] [stdout]    |                    ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/collection_vector.rs:40:6
[INFO] [stdout]    |
[INFO] [stdout] 40 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]  --> src/option_base.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let some_number = Some(5);
[INFO] [stdout]   |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_string`
[INFO] [stdout]  --> src/option_base.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let some_string = Some(String::from("a string"));
[INFO] [stdout]   |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `absent_number`
[INFO] [stdout]  --> src/option_base.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         let absent_number: Option<i32> = None;
[INFO] [stdout]   |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_absent_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/struct_base.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let b = Point(30, 11);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/fn_base.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let a: i32 = square(37, 41);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/fn_base.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let b: f64 = square(37.2, 41.1);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/collection_vector.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let mut v: Vec<i32> = Vec::new();
[INFO] [stdout]   |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v1`
[INFO] [stdout]   --> src/collection_vector.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let v1 = vec![1, 2, 3];
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_v1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/collection_vector.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let c = vec![
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/collection_vector.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let mut v: Vec<i32> = Vec::new();
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/collection_vector.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let mut v = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest_i32`
[INFO] [stdout]  --> src/generic_base.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn largest_i32(list: &[i32]) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Option`
[INFO] [stdout]   --> src/generic_base.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum Option<T> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Result`
[INFO] [stdout]   --> src/generic_base.rs:26:6
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Result<T, E> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Dog`
[INFO] [stdout]  --> src/struct_base.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Dog {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `A`
[INFO] [stdout]   --> src/struct_base.rs:56:16
[INFO] [stdout]    |
[INFO] [stdout] 56 |         struct A {};
[INFO] [stdout]    |                ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_weight`
[INFO] [stdout]   --> src/struct_base.rs:77:16
[INFO] [stdout]    |
[INFO] [stdout] 77 |             fn get_weight(&self) -> f32 {
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_height`
[INFO] [stdout]   --> src/struct_base.rs:81:16
[INFO] [stdout]    |
[INFO] [stdout] 81 |             fn get_height(&self) -> f32 {
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Turkey`
[INFO] [stdout]   --> src/generic_bound.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct Turkey;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `red`
[INFO] [stdout]   --> src/generic_bound.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn red<T: Red>(_: &T)   -> &'static str { "red" }
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `blue`
[INFO] [stdout]   --> src/generic_bound.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn blue<T: Blue>(_: &T) -> &'static str { "blue" }
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/generic_bound.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "20d71bba34df8f6801593721919d86f7abf2ae0adeebfd3a9348f3bcac9b1b62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20d71bba34df8f6801593721919d86f7abf2ae0adeebfd3a9348f3bcac9b1b62", kill_on_drop: false }`
[INFO] [stdout] 20d71bba34df8f6801593721919d86f7abf2ae0adeebfd3a9348f3bcac9b1b62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4a15698bd64a25c1f6edfa64cea63b6af8ccfb31d9106eac17fb041eb97899b6
[INFO] running `Command { std: "docker" "start" "-a" "4a15698bd64a25c1f6edfa64cea63b6af8ccfb31d9106eac17fb041eb97899b6", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/option_base.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/string_base.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/struct_base.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/struct_base.rs:56:20
[INFO] [stderr]    |
[INFO] [stderr] 56 |         struct A {};
[INFO] [stderr]    |                    ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/collection_vector.rs:40:6
[INFO] [stderr]    |
[INFO] [stderr] 40 |     };
[INFO] [stderr]    |      ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_number`
[INFO] [stderr]  --> src/option_base.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let some_number = Some(5);
[INFO] [stderr]   |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_string`
[INFO] [stderr]  --> src/option_base.rs:8:13
[INFO] [stderr]   |
[INFO] [stderr] 8 |         let some_string = Some(String::from("a string"));
[INFO] [stderr]   |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `absent_number`
[INFO] [stderr]  --> src/option_base.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |         let absent_number: Option<i32> = None;
[INFO] [stderr]   |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_absent_number`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/struct_base.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let b = Point(30, 11);
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/fn_base.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let a: i32 = square(37, 41);
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/fn_base.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         let b: f64 = square(37.2, 41.1);
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]  --> src/collection_vector.rs:6:17
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let mut v: Vec<i32> = Vec::new();
[INFO] [stderr]   |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v1`
[INFO] [stderr]   --> src/collection_vector.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let v1 = vec![1, 2, 3];
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_v1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/collection_vector.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let c = vec![
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/collection_vector.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let mut v: Vec<i32> = Vec::new();
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/collection_vector.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut v = vec![1, 2, 3, 4, 5];
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest_i32`
[INFO] [stderr]  --> src/generic_base.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn largest_i32(list: &[i32]) -> i32 {
[INFO] [stderr]   |    ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Option`
[INFO] [stderr]   --> src/generic_base.rs:21:6
[INFO] [stderr]    |
[INFO] [stderr] 21 | enum Option<T> {
[INFO] [stderr]    |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Result`
[INFO] [stderr]   --> src/generic_base.rs:26:6
[INFO] [stderr]    |
[INFO] [stderr] 26 | enum Result<T, E> {
[INFO] [stderr]    |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Dog`
[INFO] [stderr]  --> src/struct_base.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Dog {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `A`
[INFO] [stderr]   --> src/struct_base.rs:56:16
[INFO] [stderr]    |
[INFO] [stderr] 56 |         struct A {};
[INFO] [stderr]    |                ^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_weight`
[INFO] [stderr]   --> src/struct_base.rs:77:16
[INFO] [stderr]    |
[INFO] [stderr] 77 |             fn get_weight(&self) -> f32 {
[INFO] [stderr]    |                ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_height`
[INFO] [stderr]   --> src/struct_base.rs:81:16
[INFO] [stderr]    |
[INFO] [stderr] 81 |             fn get_height(&self) -> f32 {
[INFO] [stderr]    |                ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Turkey`
[INFO] [stderr]   --> src/generic_bound.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | struct Turkey;
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `red`
[INFO] [stderr]   --> src/generic_bound.rs:64:4
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn red<T: Red>(_: &T)   -> &'static str { "red" }
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `blue`
[INFO] [stderr]   --> src/generic_bound.rs:65:4
[INFO] [stderr]    |
[INFO] [stderr] 65 | fn blue<T: Blue>(_: &T) -> &'static str { "blue" }
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]   --> src/generic_bound.rs:67:4
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn main() {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rustlab` (bin "rustlab" test) generated 27 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rustlab-795161d270c3152b)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test collection_vector::test::tmain ... ok
[INFO] [stdout] test fn_base::test::tmain ... ok
[INFO] [stdout] test generic_bound::test::tmain ... ok
[INFO] [stdout] test generic_bound::testx::tmain ... ok
[INFO] [stdout] test generic_base::test::tmain ... ok
[INFO] [stdout] test generic_bound_where::test::tmain ... ok
[INFO] [stdout] test generic_impl::test::it_works ... ok
[INFO] [stdout] test option_base::test::tmain ... ok
[INFO] [stdout] test override_add_operator::test::tmain ... ok
[INFO] [stdout] test hashmap_base::test::tmain ... ok
[INFO] [stdout] test string_base::test::tmain ... ok
[INFO] [stdout] test struct_base::test::struct_with_function ... ok
[INFO] [stdout] test struct_base::test::struct_fn ... ok
[INFO] [stdout] test trait_base::test::tmain ... ok
[INFO] [stdout] test trait_test::test::tmain ... ok
[INFO] [stdout] test generic_impl::test::failing_test - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4a15698bd64a25c1f6edfa64cea63b6af8ccfb31d9106eac17fb041eb97899b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a15698bd64a25c1f6edfa64cea63b6af8ccfb31d9106eac17fb041eb97899b6", kill_on_drop: false }`
[INFO] [stdout] 4a15698bd64a25c1f6edfa64cea63b6af8ccfb31d9106eac17fb041eb97899b6
