[INFO] cloning repository https://github.com/Elekrisk/alwim
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Elekrisk/alwim" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElekrisk%2Falwim", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElekrisk%2Falwim'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 59d6e267a480f7578864a14e24fd0c138c1ccfc7
[INFO] testing Elekrisk/alwim against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElekrisk%2Falwim" "/workspace/builds/worker-118/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-118/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Elekrisk/alwim on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Elekrisk/alwim
[INFO] finished tweaking git repo https://github.com/Elekrisk/alwim
[INFO] tweaked toml for git repo https://github.com/Elekrisk/alwim written to /workspace/builds/worker-118/source/Cargo.toml
[INFO] crate git repo https://github.com/Elekrisk/alwim already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e82c85f2ee7020f284d6373356fa654a61de5bb758111638c494554d6531333
[INFO] running `Command { std: "docker" "start" "-a" "8e82c85f2ee7020f284d6373356fa654a61de5bb758111638c494554d6531333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e82c85f2ee7020f284d6373356fa654a61de5bb758111638c494554d6531333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e82c85f2ee7020f284d6373356fa654a61de5bb758111638c494554d6531333", kill_on_drop: false }`
[INFO] [stdout] 8e82c85f2ee7020f284d6373356fa654a61de5bb758111638c494554d6531333
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 999cb46c9b3dd685596baeee8dd10d9b4271aa06817fd5a868981497ec8c6a2a
[INFO] running `Command { std: "docker" "start" "-a" "999cb46c9b3dd685596baeee8dd10d9b4271aa06817fd5a868981497ec8c6a2a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling alwim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `io::Read`
[INFO] [stdout]  --> src/lexer.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{str::Chars, io::Read};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ops::Index`
[INFO] [stdout]  --> src/utils.rs:1:53
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{any::{Any, TypeId}, collections::HashMap, ops::Index};
[INFO] [stdout]   |                                                     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> src/ast.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Node<T> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `inner`
[INFO] [stdout]  --> src/utils.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     inner: HashMap<TypeId, Box<dyn Any>>
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/utils.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]   --> src/utils.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn set<T: 'static>(&mut self, item: T) -> Option<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/utils.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn remove<T: 'static>(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/utils.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn get<T: 'static>(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_or_add_default`
[INFO] [stdout]   --> src/utils.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn get_or_add_default<T: Default + 'static>(&mut self) -> &T {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut`
[INFO] [stdout]   --> src/utils.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut_or_add_default`
[INFO] [stdout]   --> src/utils.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn get_mut_or_add_default<T: Default + 'static>(&mut self) -> &mut T {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Storage`
[INFO] [stdout]   --> src/utils.rs:72:12
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub struct Storage<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Id`
[INFO] [stdout]   --> src/utils.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Id<T> {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/utils.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn new(id: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/utils.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]    --> src/utils.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub fn add(&mut self, item: T) -> Id<T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]    --> src/utils.rs:113:12
[INFO] [stdout]     |
[INFO] [stdout] 113 |     pub fn remove(&mut self, id: Id<T>) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/utils.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn get(&self, id: Id<T>) -> Option<&T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut`
[INFO] [stdout]    --> src/utils.rs:122:12
[INFO] [stdout]     |
[INFO] [stdout] 122 |     pub fn get_mut(&mut self, id: Id<T>) -> Option<&mut T> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Keeper`
[INFO] [stdout]    --> src/utils.rs:128:12
[INFO] [stdout]     |
[INFO] [stdout] 128 | pub struct Keeper<T, I: Iterator<Item=T>> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/utils.rs:136:12
[INFO] [stdout]     |
[INFO] [stdout] 136 |     pub fn new(iter: I) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save_loc`
[INFO] [stdout]    --> src/utils.rs:145:12
[INFO] [stdout]     |
[INFO] [stdout] 145 |     pub fn save_loc(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `load_loc`
[INFO] [stdout]    --> src/utils.rs:149:12
[INFO] [stdout]     |
[INFO] [stdout] 149 |     pub fn load_loc(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `discard_loc`
[INFO] [stdout]    --> src/utils.rs:153:12
[INFO] [stdout]     |
[INFO] [stdout] 153 |     pub fn discard_loc(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]    --> src/utils.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub fn next(&mut self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back`
[INFO] [stdout]    --> src/utils.rs:163:12
[INFO] [stdout]     |
[INFO] [stdout] 163 |     pub fn back(&mut self) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/utils.rs:167:12
[INFO] [stdout]     |
[INFO] [stdout] 167 |     pub fn get(&mut self, i: usize) -> Option<&T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut`
[INFO] [stdout]    --> src/utils.rs:176:12
[INFO] [stdout]     |
[INFO] [stdout] 176 |     pub fn get_mut(&mut self, i: usize) -> Option<&mut T> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lexer`
[INFO] [stdout]  --> src/lexer.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Lexer<'a> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(code: &'a str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CodeStorage`
[INFO] [stdout]   --> src/lexer.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct CodeStorage<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new(code: &'a str) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/lexer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn next(&mut self) -> Option<char> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back`
[INFO] [stdout]   --> src/lexer.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn back(&mut self) -> Option<()> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Token`
[INFO] [stdout]  --> src/token.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Token {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/utils.rs:168:12
[INFO] [stdout]     |
[INFO] [stdout] 168 |         if i < 0 { return None; }
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/utils.rs:177:12
[INFO] [stdout]     |
[INFO] [stdout] 177 |         if i < 0 { return None; }
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.23s
[INFO] running `Command { std: "docker" "inspect" "999cb46c9b3dd685596baeee8dd10d9b4271aa06817fd5a868981497ec8c6a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "999cb46c9b3dd685596baeee8dd10d9b4271aa06817fd5a868981497ec8c6a2a", kill_on_drop: false }`
[INFO] [stdout] 999cb46c9b3dd685596baeee8dd10d9b4271aa06817fd5a868981497ec8c6a2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05f632aa455d85f1ec6ebcd05c8248d3a84887473a00c981f2e684b486d2782e
[INFO] running `Command { std: "docker" "start" "-a" "05f632aa455d85f1ec6ebcd05c8248d3a84887473a00c981f2e684b486d2782e", kill_on_drop: false }`
[INFO] [stderr]    Compiling alwim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `io::Read`
[INFO] [stdout]  --> src/lexer.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{str::Chars, io::Read};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ops::Index`
[INFO] [stdout]  --> src/utils.rs:1:53
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{any::{Any, TypeId}, collections::HashMap, ops::Index};
[INFO] [stdout]   |                                                     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> src/ast.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Node<T> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `inner`
[INFO] [stdout]  --> src/utils.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     inner: HashMap<TypeId, Box<dyn Any>>
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/utils.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]   --> src/utils.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn set<T: 'static>(&mut self, item: T) -> Option<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/utils.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn remove<T: 'static>(&mut self) -> Option<T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/utils.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn get<T: 'static>(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_or_add_default`
[INFO] [stdout]   --> src/utils.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn get_or_add_default<T: Default + 'static>(&mut self) -> &T {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut`
[INFO] [stdout]   --> src/utils.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut_or_add_default`
[INFO] [stdout]   --> src/utils.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn get_mut_or_add_default<T: Default + 'static>(&mut self) -> &mut T {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Storage`
[INFO] [stdout]   --> src/utils.rs:72:12
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub struct Storage<T> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Id`
[INFO] [stdout]   --> src/utils.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Id<T> {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/utils.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn new(id: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/utils.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]    --> src/utils.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub fn add(&mut self, item: T) -> Id<T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]    --> src/utils.rs:113:12
[INFO] [stdout]     |
[INFO] [stdout] 113 |     pub fn remove(&mut self, id: Id<T>) -> Option<T> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/utils.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn get(&self, id: Id<T>) -> Option<&T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut`
[INFO] [stdout]    --> src/utils.rs:122:12
[INFO] [stdout]     |
[INFO] [stdout] 122 |     pub fn get_mut(&mut self, id: Id<T>) -> Option<&mut T> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Keeper`
[INFO] [stdout]    --> src/utils.rs:128:12
[INFO] [stdout]     |
[INFO] [stdout] 128 | pub struct Keeper<T, I: Iterator<Item=T>> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/utils.rs:136:12
[INFO] [stdout]     |
[INFO] [stdout] 136 |     pub fn new(iter: I) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save_loc`
[INFO] [stdout]    --> src/utils.rs:145:12
[INFO] [stdout]     |
[INFO] [stdout] 145 |     pub fn save_loc(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `load_loc`
[INFO] [stdout]    --> src/utils.rs:149:12
[INFO] [stdout]     |
[INFO] [stdout] 149 |     pub fn load_loc(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `discard_loc`
[INFO] [stdout]    --> src/utils.rs:153:12
[INFO] [stdout]     |
[INFO] [stdout] 153 |     pub fn discard_loc(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]    --> src/utils.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub fn next(&mut self) -> Option<&T> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back`
[INFO] [stdout]    --> src/utils.rs:163:12
[INFO] [stdout]     |
[INFO] [stdout] 163 |     pub fn back(&mut self) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/utils.rs:167:12
[INFO] [stdout]     |
[INFO] [stdout] 167 |     pub fn get(&mut self, i: usize) -> Option<&T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_mut`
[INFO] [stdout]    --> src/utils.rs:176:12
[INFO] [stdout]     |
[INFO] [stdout] 176 |     pub fn get_mut(&mut self, i: usize) -> Option<&mut T> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lexer`
[INFO] [stdout]  --> src/lexer.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Lexer<'a> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(code: &'a str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CodeStorage`
[INFO] [stdout]   --> src/lexer.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct CodeStorage<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new(code: &'a str) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/lexer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn next(&mut self) -> Option<char> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back`
[INFO] [stdout]   --> src/lexer.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn back(&mut self) -> Option<()> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Token`
[INFO] [stdout]  --> src/token.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Token {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/utils.rs:168:12
[INFO] [stdout]     |
[INFO] [stdout] 168 |         if i < 0 { return None; }
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/utils.rs:177:12
[INFO] [stdout]     |
[INFO] [stdout] 177 |         if i < 0 { return None; }
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "05f632aa455d85f1ec6ebcd05c8248d3a84887473a00c981f2e684b486d2782e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05f632aa455d85f1ec6ebcd05c8248d3a84887473a00c981f2e684b486d2782e", kill_on_drop: false }`
[INFO] [stdout] 05f632aa455d85f1ec6ebcd05c8248d3a84887473a00c981f2e684b486d2782e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 45a7b41a49f7d39f3710b9fab5639762dbb23000aa81bccccd6ea70b765390bb
[INFO] running `Command { std: "docker" "start" "-a" "45a7b41a49f7d39f3710b9fab5639762dbb23000aa81bccccd6ea70b765390bb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `io::Read`
[INFO] [stderr]  --> src/lexer.rs:1:23
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{str::Chars, io::Read};
[INFO] [stderr]   |                       ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ops::Index`
[INFO] [stderr]  --> src/utils.rs:1:53
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{any::{Any, TypeId}, collections::HashMap, ops::Index};
[INFO] [stderr]   |                                                     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/ast.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Node<T> {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `inner`
[INFO] [stderr]  --> src/utils.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     inner: HashMap<TypeId, Box<dyn Any>>
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/utils.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set`
[INFO] [stderr]   --> src/utils.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn set<T: 'static>(&mut self, item: T) -> Option<T> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `remove`
[INFO] [stderr]   --> src/utils.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn remove<T: 'static>(&mut self) -> Option<T> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]   --> src/utils.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn get<T: 'static>(&self) -> Option<&T> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_or_add_default`
[INFO] [stderr]   --> src/utils.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn get_or_add_default<T: Default + 'static>(&mut self) -> &T {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_mut`
[INFO] [stderr]   --> src/utils.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_mut_or_add_default`
[INFO] [stderr]   --> src/utils.rs:46:12
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn get_mut_or_add_default<T: Default + 'static>(&mut self) -> &mut T {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Storage`
[INFO] [stderr]   --> src/utils.rs:72:12
[INFO] [stderr]    |
[INFO] [stderr] 72 | pub struct Storage<T> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Id`
[INFO] [stderr]   --> src/utils.rs:78:12
[INFO] [stderr]    |
[INFO] [stderr] 78 | pub struct Id<T> {
[INFO] [stderr]    |            ^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/utils.rs:84:8
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn new(id: usize) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/utils.rs:93:12
[INFO] [stderr]    |
[INFO] [stderr] 93 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add`
[INFO] [stderr]    --> src/utils.rs:101:12
[INFO] [stderr]     |
[INFO] [stderr] 101 |     pub fn add(&mut self, item: T) -> Id<T> {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `remove`
[INFO] [stderr]    --> src/utils.rs:113:12
[INFO] [stderr]     |
[INFO] [stderr] 113 |     pub fn remove(&mut self, id: Id<T>) -> Option<T> {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]    --> src/utils.rs:118:12
[INFO] [stderr]     |
[INFO] [stderr] 118 |     pub fn get(&self, id: Id<T>) -> Option<&T> {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_mut`
[INFO] [stderr]    --> src/utils.rs:122:12
[INFO] [stderr]     |
[INFO] [stderr] 122 |     pub fn get_mut(&mut self, id: Id<T>) -> Option<&mut T> {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Keeper`
[INFO] [stderr]    --> src/utils.rs:128:12
[INFO] [stderr]     |
[INFO] [stderr] 128 | pub struct Keeper<T, I: Iterator<Item=T>> {
[INFO] [stderr]     |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/utils.rs:136:12
[INFO] [stderr]     |
[INFO] [stderr] 136 |     pub fn new(iter: I) -> Self {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `save_loc`
[INFO] [stderr]    --> src/utils.rs:145:12
[INFO] [stderr]     |
[INFO] [stderr] 145 |     pub fn save_loc(&mut self) {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `load_loc`
[INFO] [stderr]    --> src/utils.rs:149:12
[INFO] [stderr]     |
[INFO] [stderr] 149 |     pub fn load_loc(&mut self) {
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `discard_loc`
[INFO] [stderr]    --> src/utils.rs:153:12
[INFO] [stderr]     |
[INFO] [stderr] 153 |     pub fn discard_loc(&mut self) {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `next`
[INFO] [stderr]    --> src/utils.rs:157:12
[INFO] [stderr]     |
[INFO] [stderr] 157 |     pub fn next(&mut self) -> Option<&T> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `back`
[INFO] [stderr]    --> src/utils.rs:163:12
[INFO] [stderr]     |
[INFO] [stderr] 163 |     pub fn back(&mut self) {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]    --> src/utils.rs:167:12
[INFO] [stderr]     |
[INFO] [stderr] 167 |     pub fn get(&mut self, i: usize) -> Option<&T> {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_mut`
[INFO] [stderr]    --> src/utils.rs:176:12
[INFO] [stderr]     |
[INFO] [stderr] 176 |     pub fn get_mut(&mut self, i: usize) -> Option<&mut T> {
[INFO] [stderr]     |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Lexer`
[INFO] [stderr]  --> src/lexer.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Lexer<'a> {
[INFO] [stderr]   |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lexer.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(code: &'a str) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `CodeStorage`
[INFO] [stderr]   --> src/lexer.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 | struct CodeStorage<'a> {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lexer.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn new(code: &'a str) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `next`
[INFO] [stderr]   --> src/lexer.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn next(&mut self) -> Option<char> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `back`
[INFO] [stderr]   --> src/lexer.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn back(&mut self) -> Option<()> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Token`
[INFO] [stderr]  --> src/token.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub enum Token {
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/utils.rs:168:12
[INFO] [stderr]     |
[INFO] [stderr] 168 |         if i < 0 { return None; }
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/utils.rs:177:12
[INFO] [stderr]     |
[INFO] [stderr] 177 |         if i < 0 { return None; }
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `alwim` (bin "alwim" test) generated 37 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.45s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/alwim-d511a9b5c7d402c6)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "45a7b41a49f7d39f3710b9fab5639762dbb23000aa81bccccd6ea70b765390bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45a7b41a49f7d39f3710b9fab5639762dbb23000aa81bccccd6ea70b765390bb", kill_on_drop: false }`
[INFO] [stdout] 45a7b41a49f7d39f3710b9fab5639762dbb23000aa81bccccd6ea70b765390bb