[INFO] cloning repository https://github.com/supersylphMKV/rust_learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/supersylphMKV/rust_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsupersylphMKV%2Frust_learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsupersylphMKV%2Frust_learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90624d6bdda31273c3df66871d0eb2ab9a07ff56
[INFO] checking supersylphMKV/rust_learn against master#f21fbac535ab2c3bc50db20547f4d48477357103 for pr-143193
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsupersylphMKV%2Frust_learn" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/supersylphMKV/rust_learn
[INFO] finished tweaking git repo https://github.com/supersylphMKV/rust_learn
[INFO] tweaked toml for git repo https://github.com/supersylphMKV/rust_learn written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/supersylphMKV/rust_learn on toolchain f21fbac535ab2c3bc50db20547f4d48477357103
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/supersylphMKV/rust_learn 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" "+f21fbac535ab2c3bc50db20547f4d48477357103" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11931301b0766a804b9500b0f5dd234eb88b4fc3bfda3cacce7558551ef2c630
[INFO] running `Command { std: "docker" "start" "-a" "11931301b0766a804b9500b0f5dd234eb88b4fc3bfda3cacce7558551ef2c630", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11931301b0766a804b9500b0f5dd234eb88b4fc3bfda3cacce7558551ef2c630", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11931301b0766a804b9500b0f5dd234eb88b4fc3bfda3cacce7558551ef2c630", kill_on_drop: false }`
[INFO] [stdout] 11931301b0766a804b9500b0f5dd234eb88b4fc3bfda3cacce7558551ef2c630
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+f21fbac535ab2c3bc50db20547f4d48477357103" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae24e89030a56894549c7c5e5555065ef4c71c1d1571e6d6b65da5b5e2c3ab2a
[INFO] running `Command { std: "docker" "start" "-a" "ae24e89030a56894549c7c5e5555065ef4c71c1d1571e6d6b65da5b5e2c3ab2a", kill_on_drop: false }`
[INFO] [stderr]     Checking step_3_2 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_2_macro)
[INFO] [stderr]     Checking step_3_3 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_3_date_time)
[INFO] [stderr]     Checking step_3_5 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_5_collections)
[INFO] [stderr]     Checking step_3_6 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_6_serde)
[INFO] [stderr]     Checking step_2 v0.1.0 (/opt/rustwide/workdir/2_idioms)
[INFO] [stderr]     Checking step_1_5 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_5_convert_cast_deref)
[INFO] [stderr]     Checking step_3_1 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_1_testing)
[INFO] [stderr]     Checking step_1_4 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_4_cow)
[INFO] [stderr]     Checking step_1_9 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_9_phantom)
[INFO] [stderr]     Checking step_2_2 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_2_mem_replace)
[INFO] [stderr]     Checking step_2_4 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_4_generic_in_type_out)
[INFO] [stderr]     Checking step_3_7 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_7_rand_crypto)
[INFO] [stderr]     Checking step_3 v0.1.0 (/opt/rustwide/workdir/3_ecosystem)
[INFO] [stderr]     Checking step_2_1 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_1_type_safety)
[INFO] [stderr]     Checking step_2_3 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_3_bound_impl)
[INFO] [stderr]     Checking step_1_3 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_3_rc_cell)
[INFO] [stderr]     Checking step_1_6 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_6_dispatch)
[INFO] [stdout] warning: unused variable: `year`
[INFO] [stdout]   --> 3_ecosystem/3_3_date_time/src/main.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `month`
[INFO] [stdout]   --> 3_ecosystem/3_3_date_time/src/main.rs:10:34
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_month`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `day`
[INFO] [stdout]   --> 3_ecosystem/3_3_date_time/src/main.rs:10:46
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_day`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NOW` is never used
[INFO] [stdout]  --> 3_ecosystem/3_3_date_time/src/main.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const NOW: &str = "2019-06-26";
[INFO] [stdout]   |       ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_adult` is never used
[INFO] [stdout]   --> 3_ecosystem/3_3_date_time/src/main.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl User {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn is_adult(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking step_3_12 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_12_web_db)
[INFO] [stderr]     Checking step_3_11 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_11_async)
[INFO] [stderr]     Checking step_1_1 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_1_default_clone_copy)
[INFO] [stderr]     Checking step_3_4 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_4_regex_parsing)
[INFO] [stderr]     Checking step_3_8 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_8_log)
[INFO] [stderr]     Checking step_1_2 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_2_box_pin)
[INFO] [stderr]     Checking step_1_7 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_7_sized)
[INFO] [stderr]     Checking step_3_10 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_10_threads)
[INFO] [stderr]     Checking step_3_9 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_9_cmd_env_conf)
[INFO] [stderr]     Checking step_1 v0.1.0 (/opt/rustwide/workdir/1_concepts)
[INFO] [stderr]     Checking step_1_8 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_8_thread_safety)
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]  --> 3_ecosystem/3_4_regex_parsing/src/main.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn parse(input: &str) -> (Option<Sign>, Option<usize>, Option<Precision>) {
[INFO] [stdout]   |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse` is never used
[INFO] [stdout]  --> 3_ecosystem/3_4_regex_parsing/src/main.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn parse(input: &str) -> (Option<Sign>, Option<usize>, Option<Precision>) {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Sign` is never used
[INFO] [stdout]   --> 3_ecosystem/3_4_regex_parsing/src/main.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Sign {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Precision` is never used
[INFO] [stdout]   --> 3_ecosystem/3_4_regex_parsing/src/main.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum Precision {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]  --> 3_ecosystem/3_4_regex_parsing/src/main.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn parse(input: &str) -> (Option<Sign>, Option<usize>, Option<Precision>) {
[INFO] [stdout]   |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `year`
[INFO] [stdout]   --> 3_ecosystem/3_3_date_time/src/main.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `month`
[INFO] [stdout]   --> 3_ecosystem/3_3_date_time/src/main.rs:10:34
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_month`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `day`
[INFO] [stdout]   --> 3_ecosystem/3_3_date_time/src/main.rs:10:46
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_day`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NOW` is never used
[INFO] [stdout]  --> 3_ecosystem/3_3_date_time/src/main.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const NOW: &str = "2019-06-26";
[INFO] [stdout]   |       ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> 3_ecosystem/3_3_date_time/src/main.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct User;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `with_birthdate`, `age`, and `is_adult` are never used
[INFO] [stdout]   --> 3_ecosystem/3_3_date_time/src/main.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 10 |     fn with_birthdate(year: i32, month: u32, day: u32) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     fn age(&self) -> u16 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn is_adult(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "ae24e89030a56894549c7c5e5555065ef4c71c1d1571e6d6b65da5b5e2c3ab2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae24e89030a56894549c7c5e5555065ef4c71c1d1571e6d6b65da5b5e2c3ab2a", kill_on_drop: false }`
[INFO] [stdout] ae24e89030a56894549c7c5e5555065ef4c71c1d1571e6d6b65da5b5e2c3ab2a