[INFO] cloning repository https://github.com/RootOfInfinity/mini-code-contest
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RootOfInfinity/mini-code-contest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRootOfInfinity%2Fmini-code-contest", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRootOfInfinity%2Fmini-code-contest'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b63d49a8641e86518706151767106cc147ba71c6
[INFO] checking RootOfInfinity/mini-code-contest against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRootOfInfinity%2Fmini-code-contest" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/RootOfInfinity/mini-code-contest
[INFO] finished tweaking git repo https://github.com/RootOfInfinity/mini-code-contest
[INFO] tweaked toml for git repo https://github.com/RootOfInfinity/mini-code-contest written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/RootOfInfinity/mini-code-contest on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/RootOfInfinity/mini-code-contest already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 307fce51f8bbcfc9425ddf58b34644df7c3d24a5e7f5b4da376451dd6437b0a5
[INFO] running `Command { std: "docker" "start" "-a" "307fce51f8bbcfc9425ddf58b34644df7c3d24a5e7f5b4da376451dd6437b0a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "307fce51f8bbcfc9425ddf58b34644df7c3d24a5e7f5b4da376451dd6437b0a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "307fce51f8bbcfc9425ddf58b34644df7c3d24a5e7f5b4da376451dd6437b0a5", kill_on_drop: false }`
[INFO] [stdout] 307fce51f8bbcfc9425ddf58b34644df7c3d24a5e7f5b4da376451dd6437b0a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73c8187f66320d9cfc2cf401bc917784199056c908e24faa58c5b652b500bae1
[INFO] running `Command { std: "docker" "start" "-a" "73c8187f66320d9cfc2cf401bc917784199056c908e24faa58c5b652b500bae1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]     Checking predicates-core v1.0.9
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking anstyle v1.0.10
[INFO] [stderr]     Checking termtree v0.5.1
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling assert_cmd v2.0.16
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking predicates-tree v1.0.12
[INFO] [stderr]     Checking predicates v3.1.3
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking bstr v1.11.3
[INFO] [stderr]     Checking code_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/core.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[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: `std::fs`
[INFO] [stdout]  --> src/core.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tester.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut right = 0;
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/tester.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut right = 0;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compile_it` is never used
[INFO] [stdout]  --> src/compiler.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn compile_it(package: core::CodePackage) -> Result<core::TestablePackage, &'static str> {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Test` is never constructed
[INFO] [stdout]   --> src/tester.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Test {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `TestSet` is never constructed
[INFO] [stdout]   --> src/tester.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct TestSet {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `input` and `output` are never read
[INFO] [stdout]   --> src/tester.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Test {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 15 |     input: Arc<str>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 16 |     output: Arc<str>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Test` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `test_num`, `description`, and `tests` are never read
[INFO] [stdout]   --> src/tester.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct TestSet {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 20 |     name: Arc<str>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 21 |     test_num: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 22 |     description: Arc<str>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 23 |     tests: Arc<[Test]>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_json` is never used
[INFO] [stdout]   --> src/tester.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl TestSet {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 27 |     fn from_json(testj: JsonValue) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_against_testcases` is never used
[INFO] [stdout]   --> src/tester.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn test_against_testcases(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tester.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut right = 0;
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/tester.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut right = 0;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Test` is never constructed
[INFO] [stdout]   --> src/tester.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Test {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `TestSet` is never constructed
[INFO] [stdout]   --> src/tester.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct TestSet {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `input` and `output` are never read
[INFO] [stdout]   --> src/tester.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Test {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 15 |     input: Arc<str>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 16 |     output: Arc<str>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Test` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `test_num`, `description`, and `tests` are never read
[INFO] [stdout]   --> src/tester.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct TestSet {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 20 |     name: Arc<str>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 21 |     test_num: u32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 22 |     description: Arc<str>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 23 |     tests: Arc<[Test]>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_json` is never used
[INFO] [stdout]   --> src/tester.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl TestSet {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 27 |     fn from_json(testj: JsonValue) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `code_challenge` (bin "code_challenge") due to 2 previous errors; 8 warnings emitted
[INFO] [stdout] warning: function `test_against_testcases` is never used
[INFO] [stdout]   --> src/tester.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn test_against_testcases(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `code_challenge` (bin "code_challenge" test) due to 2 previous errors; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "73c8187f66320d9cfc2cf401bc917784199056c908e24faa58c5b652b500bae1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73c8187f66320d9cfc2cf401bc917784199056c908e24faa58c5b652b500bae1", kill_on_drop: false }`
[INFO] [stdout] 73c8187f66320d9cfc2cf401bc917784199056c908e24faa58c5b652b500bae1
