[INFO] cloning repository https://github.com/nvegater/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nvegater/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnvegater%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnvegater%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 03a651ac1d439b94f8a722a3a97422f7db64539e
[INFO] checking nvegater/learning-rust against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnvegater%2Flearning-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nvegater/learning-rust
[INFO] finished tweaking git repo https://github.com/nvegater/learning-rust
[INFO] tweaked toml for git repo https://github.com/nvegater/learning-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nvegater/learning-rust on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nvegater/learning-rust 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "e40e9058ed88bf50275903c3a1b3e8365ad47c8779b4760a62b4daaa5de349e8", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "rm" "-f" "e40e9058ed88bf50275903c3a1b3e8365ad47c8779b4760a62b4daaa5de349e8", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 879de1e1f527890603b8f093150bf2fd7cf27fdfb12dd184a5c6fafd951fe1af
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[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/domain.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point {
[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 items `new` and `distance_to` are never used
[INFO] [stdout]   --> src/domain.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Point {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn new(x: f64, y: f64) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn distance_to(&self, other: &Point) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Shape` is never used
[INFO] [stdout]   --> src/domain.rs:33:6
[INFO] [stdout]    |
[INFO] [stdout] 33 | enum Shape {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Describable` is never used
[INFO] [stdout]   --> src/domain.rs:43:7
[INFO] [stdout]    |
[INFO] [stdout] 43 | trait Describable {
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]   --> src/domain.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl Shape {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 49 |     fn area(&self) -> f64 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_description` is never used
[INFO] [stdout]   --> src/domain.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn print_description(item: &impl Describable) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ParseError` is never used
[INFO] [stdout]   --> src/errors.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum ParseError {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_positive` is never used
[INFO] [stdout]   --> src/errors.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn parse_positive(input: &str) -> Result<f64, ParseError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_above` is never used
[INFO] [stdout]   --> src/errors.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn first_above(values: &[f64], threshold: f64) -> Option<f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_and_double` is never used
[INFO] [stdout]   --> src/errors.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn parse_and_double(input: &str) -> Result<f64, ParseError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_above_or_error` is never used
[INFO] [stdout]   --> src/errors.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn first_above_or_error(values: &[f64], threshold: f64) -> Result<f64, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `my_own_string_length` is never used
[INFO] [stdout]  --> src/ownership.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn my_own_string_length(owned_string: String) -> usize {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrowed_string_length` is never used
[INFO] [stdout]   --> src/ownership.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn borrowed_string_length(borrowed_reference_to_string: &String) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `append_world` is never used
[INFO] [stdout]   --> src/ownership.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn append_world(mutable_string: &mut String) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `append_world_functional` is never used
[INFO] [stdout]   --> src/ownership.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn append_world_functional(s: String) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_ten` is never used
[INFO] [stdout]   --> src/ownership.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn add_ten(copied_number: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/ownership.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn first_word(borrowed_string: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.75s
[INFO] running `Command { std: "docker" "inspect" "879de1e1f527890603b8f093150bf2fd7cf27fdfb12dd184a5c6fafd951fe1af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "879de1e1f527890603b8f093150bf2fd7cf27fdfb12dd184a5c6fafd951fe1af", kill_on_drop: false }`
[INFO] [stdout] 879de1e1f527890603b8f093150bf2fd7cf27fdfb12dd184a5c6fafd951fe1af