[INFO] cloning repository https://github.com/zholiferova/Rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zholiferova/Rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzholiferova%2FRust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzholiferova%2FRust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ba9aeda6903740175b963aab1ce1858fbd4741c4
[INFO] testing zholiferova/Rust-learning against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzholiferova%2FRust-learning" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zholiferova/Rust-learning
[INFO] finished tweaking git repo https://github.com/zholiferova/Rust-learning
[INFO] tweaked toml for git repo https://github.com/zholiferova/Rust-learning written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zholiferova/Rust-learning on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zholiferova/Rust-learning 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding proc-macro2 v1.0.103
[INFO] [stderr]       Adding quote v1.0.42
[INFO] [stderr]       Adding smart-default v0.7.1
[INFO] [stderr]       Adding syn v2.0.110
[INFO] [stderr]       Adding unicode-ident v1.0.22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 44a3da17318bc216f95ecb4f05a25ac7e9b79045fecb5895afa7e9cae87405c8
[INFO] running `Command { std: "docker" "start" "-a" "44a3da17318bc216f95ecb4f05a25ac7e9b79045fecb5895afa7e9cae87405c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "44a3da17318bc216f95ecb4f05a25ac7e9b79045fecb5895afa7e9cae87405c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44a3da17318bc216f95ecb4f05a25ac7e9b79045fecb5895afa7e9cae87405c8", kill_on_drop: false }`
[INFO] [stdout] 44a3da17318bc216f95ecb4f05a25ac7e9b79045fecb5895afa7e9cae87405c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3af6b4c52048ca5ca27b6aa40a3f6017e3443a11d4efe001edac2f7a0daf8cc0
[INFO] running `Command { std: "docker" "start" "-a" "3af6b4c52048ca5ca27b6aa40a3f6017e3443a11d4efe001edac2f7a0daf8cc0", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling step_2_5 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_5_exhaustivity)
[INFO] [stderr]    Compiling step_4 v0.1.0 (/opt/rustwide/workdir/4_backend)
[INFO] [stderr]    Compiling step_1_7 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_7_sized)
[INFO] [stderr]    Compiling step_1_4 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_4_cow)
[INFO] [stderr]    Compiling step_2_2 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_2_mem_replace)
[INFO] [stderr]    Compiling step_3_11 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_11_async)
[INFO] [stderr]    Compiling step_2_6 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_6_sealing)
[INFO] [stderr]    Compiling step_3_3 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_3_date_time)
[INFO] [stderr]    Compiling step_1_6 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_6_dispatch)
[INFO] [stderr]    Compiling step_3_10 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_10_threads)
[INFO] [stderr]    Compiling step_4_3 v0.1.0 (/opt/rustwide/workdir/4_backend/4_3_api)
[INFO] [stderr]    Compiling step_1 v0.1.0 (/opt/rustwide/workdir/1_concepts)
[INFO] [stderr]    Compiling step_3_9 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_9_cmd_env_conf)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> 2_idioms/2_6_sealing/src/my_iterator_ext.rs:28:26
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn format(self, sep: &str) -> Format<Self>
[INFO] [stdout]    |                          ^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn format(self, sep: &str) -> Format<'_, Self>
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> 2_idioms/2_6_sealing/src/my_iterator_ext.rs:64:34
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn format_with<F>(self, sep: &str, format: F) -> FormatWith<Self, F>
[INFO] [stdout]    |                                  ^^^^                ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                                  |
[INFO] [stdout]    |                                  the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn format_with<F>(self, sep: &str, format: F) -> FormatWith<'_, Self, F>
[INFO] [stdout]    |                                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling step_3_1 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_1_testing)
[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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) 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]    Compiling step_2 v0.1.0 (/opt/rustwide/workdir/2_idioms)
[INFO] [stderr]    Compiling step_1_8 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_8_thread_safety)
[INFO] [stderr]    Compiling step_3 v0.1.0 (/opt/rustwide/workdir/3_ecosystem)
[INFO] [stderr]    Compiling step_2_4 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_4_generic_in_type_out)
[INFO] [stderr]    Compiling step_3_5 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_5_collections)
[INFO] [stderr]    Compiling step_3_2 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_2_macro)
[INFO] [stderr]    Compiling step_3_7 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_7_rand_crypto)
[INFO] [stderr]    Compiling step_3_8 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_8_log)
[INFO] [stderr]    Compiling step_1_9 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_9_phantom)
[INFO] [stderr]    Compiling step_1_5 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_5_convert_cast_deref)
[INFO] [stderr]    Compiling step_4_2 v0.1.0 (/opt/rustwide/workdir/4_backend/4_2_http)
[INFO] [stderr]    Compiling step_1_3 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_3_rc_cell)
[INFO] [stderr]    Compiling step_2_3 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_3_bound_impl)
[INFO] [stderr]    Compiling step_2_1 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_1_type_safety)
[INFO] [stderr]    Compiling step_3_4 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_4_regex_parsing)
[INFO] [stderr]    Compiling step_3_6 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_6_serde)
[INFO] [stderr]    Compiling step_1_2 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_2_box_pin)
[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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) 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] [stderr]    Compiling step_4_1 v0.1.0 (/opt/rustwide/workdir/4_backend/4_1_db)
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]  --> 1_concepts/1_2_box_pin/src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Unmovable {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 5 |     data: Vec<i32>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Unmovable` has a derived impl for the trait `Debug`, 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] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling smart-default v0.7.1
[INFO] [stderr]    Compiling step_1_1 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_1_default_clone_copy)
[INFO] [stdout] error[E0601]: `main` function not found in crate `step_1_1`
[INFO] [stdout]   --> 1_concepts/1_1_default_clone_copy/src/main.rs:26:2
[INFO] [stdout]    |
[INFO] [stdout] 26 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `1_concepts/1_1_default_clone_copy/src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `step_1_1` (bin "step_1_1") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "3af6b4c52048ca5ca27b6aa40a3f6017e3443a11d4efe001edac2f7a0daf8cc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3af6b4c52048ca5ca27b6aa40a3f6017e3443a11d4efe001edac2f7a0daf8cc0", kill_on_drop: false }`
[INFO] [stdout] 3af6b4c52048ca5ca27b6aa40a3f6017e3443a11d4efe001edac2f7a0daf8cc0