[INFO] fetching crate hands_on_data_structures_algorithms-practice 0.1.0...
[INFO] testing hands_on_data_structures_algorithms-practice-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate hands_on_data_structures_algorithms-practice 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate hands_on_data_structures_algorithms-practice 0.1.0
[INFO] finished tweaking crates.io crate hands_on_data_structures_algorithms-practice 0.1.0
[INFO] tweaked toml for crates.io crate hands_on_data_structures_algorithms-practice 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate hands_on_data_structures_algorithms-practice 0.1.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate hands_on_data_structures_algorithms-practice 0.1.0 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2200041b075bc25525c482ee9b93eec96f525d0859ab7485a77b4414d5f2f513
[INFO] running `Command { std: "docker" "start" "-a" "2200041b075bc25525c482ee9b93eec96f525d0859ab7485a77b4414d5f2f513", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2200041b075bc25525c482ee9b93eec96f525d0859ab7485a77b4414d5f2f513", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2200041b075bc25525c482ee9b93eec96f525d0859ab7485a77b4414d5f2f513", kill_on_drop: false }`
[INFO] [stdout] 2200041b075bc25525c482ee9b93eec96f525d0859ab7485a77b4414d5f2f513
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e75b476114de8029168f2eeec64a0c515a4aa8ed6f8437d9ce2e491ed9672455
[INFO] running `Command { std: "docker" "start" "-a" "e75b476114de8029168f2eeec64a0c515a4aa8ed6f8437d9ce2e491ed9672455", kill_on_drop: false }`
[INFO] [stderr]    Compiling hands_on_data_structures_algorithms-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `fave_color` is never read
[INFO] [stdout]  --> src/bin/sturct-enum.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Person {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 6 |     fave_color: Color,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` 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] [stdout] warning: field `age` is never read
[INFO] [stdout]  --> src/bin/common-dstructure-mutability.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Person {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 3 |     name: String,
[INFO] [stdout] 4 |     age: i32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has derived impls for the traits `Clone` and `Debug`, but these are 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: field `y` is never read
[INFO] [stdout]   --> src/bin/common-dstructure-mutability.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct Point {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout]  9 |     x: i32,
[INFO] [stdout] 10 |     y: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Point` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "e75b476114de8029168f2eeec64a0c515a4aa8ed6f8437d9ce2e491ed9672455", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e75b476114de8029168f2eeec64a0c515a4aa8ed6f8437d9ce2e491ed9672455", kill_on_drop: false }`
[INFO] [stdout] e75b476114de8029168f2eeec64a0c515a4aa8ed6f8437d9ce2e491ed9672455
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab787aab4df1f1d26cab6e393c4ff9238978a1fdee2e8ce5f45087ce36e2f9a1
[INFO] running `Command { std: "docker" "start" "-a" "ab787aab4df1f1d26cab6e393c4ff9238978a1fdee2e8ce5f45087ce36e2f9a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling hands_on_data_structures_algorithms-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `age` is never read
[INFO] [stdout]  --> src/bin/common-dstructure-mutability.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Person {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 3 |     name: String,
[INFO] [stdout] 4 |     age: i32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has derived impls for the traits `Clone` and `Debug`, but these are 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: field `y` is never read
[INFO] [stdout]   --> src/bin/common-dstructure-mutability.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct Point {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout]  9 |     x: i32,
[INFO] [stdout] 10 |     y: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Point` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `fave_color` is never read
[INFO] [stdout]  --> src/bin/sturct-enum.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Person {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 6 |     fave_color: Color,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` 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]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "ab787aab4df1f1d26cab6e393c4ff9238978a1fdee2e8ce5f45087ce36e2f9a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab787aab4df1f1d26cab6e393c4ff9238978a1fdee2e8ce5f45087ce36e2f9a1", kill_on_drop: false }`
[INFO] [stdout] ab787aab4df1f1d26cab6e393c4ff9238978a1fdee2e8ce5f45087ce36e2f9a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] eeea128f4f5a6c1b6382b118bd8e7b3ef8c0326c057172996193ee5ce8cfbddd
[INFO] running `Command { std: "docker" "start" "-a" "eeea128f4f5a6c1b6382b118bd8e7b3ef8c0326c057172996193ee5ce8cfbddd", kill_on_drop: false }`
[INFO] [stderr] warning: field `age` is never read
[INFO] [stderr]  --> src/bin/common-dstructure-mutability.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Person {
[INFO] [stderr]   |            ------ field in this struct
[INFO] [stderr] 3 |     name: String,
[INFO] [stderr] 4 |     age: i32,
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Person` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `y` is never read
[INFO] [stderr]   --> src/bin/common-dstructure-mutability.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr]  8 | pub struct Point {
[INFO] [stderr]    |            ----- field in this struct
[INFO] [stderr]  9 |     x: i32,
[INFO] [stderr] 10 |     y: i32,
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Point` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `hands_on_data_structures_algorithms-practice` (bin "common-dstructure-mutability" test) generated 2 warnings
[INFO] [stderr] warning: field `fave_color` is never read
[INFO] [stderr]  --> src/bin/sturct-enum.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Person {
[INFO] [stderr]   |            ------ field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 6 |     fave_color: Color,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `hands_on_data_structures_algorithms-practice` (bin "sturct-enum" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/bin/common-dstructure-mutability.rs (/opt/rustwide/target/debug/deps/common_dstructure_mutability-00766e75d46d4150)
[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] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hands_on_data_structures_algorithms_practice-6aa08e0e19c88b65)
[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] [stderr]      Running unittests src/bin/loop-ex.rs (/opt/rustwide/target/debug/deps/loop_ex-7199c1b879b9c6cf)
[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] [stderr]      Running unittests src/bin/ownmemory-heap-box.rs (/opt/rustwide/target/debug/deps/ownmemory_heap_box-a89106c44ac66131)
[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] [stderr]      Running unittests src/bin/pointers-lifetime.rs (/opt/rustwide/target/debug/deps/pointers_lifetime-49a40ce5dbd89752)
[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] [stderr]      Running unittests src/bin/results-option.rs (/opt/rustwide/target/debug/deps/results_option-ca647103229fb116)
[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] [stderr]      Running unittests src/bin/sturct-enum.rs (/opt/rustwide/target/debug/deps/sturct_enum-9c3055a616f6bfdc)
[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" "eeea128f4f5a6c1b6382b118bd8e7b3ef8c0326c057172996193ee5ce8cfbddd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeea128f4f5a6c1b6382b118bd8e7b3ef8c0326c057172996193ee5ce8cfbddd", kill_on_drop: false }`
[INFO] [stdout] eeea128f4f5a6c1b6382b118bd8e7b3ef8c0326c057172996193ee5ce8cfbddd