[INFO] cloning repository https://github.com/thTs0ustas/rust_course
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thTs0ustas/rust_course" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FthTs0ustas%2Frust_course", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FthTs0ustas%2Frust_course'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8c8592f31edd7ea1360e597880c3ab56417d36a
[INFO] testing thTs0ustas/rust_course against beta-2025-09-21 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FthTs0ustas%2Frust_course" "/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/thTs0ustas/rust_course
[INFO] finished tweaking git repo https://github.com/thTs0ustas/rust_course
[INFO] tweaked toml for git repo https://github.com/thTs0ustas/rust_course written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/thTs0ustas/rust_course 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 git repo https://github.com/thTs0ustas/rust_course 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing thTs0ustas/rust_course against beta-2025-09-21 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FthTs0ustas%2Frust_course" "/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/thTs0ustas/rust_course
[INFO] finished tweaking git repo https://github.com/thTs0ustas/rust_course
[INFO] tweaked toml for git repo https://github.com/thTs0ustas/rust_course written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/thTs0ustas/rust_course 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 git repo https://github.com/thTs0ustas/rust_course 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c2947f14f0452463419aa05e49ac368c98919a0a410d5738fe6b912852f7a9fc
[INFO] running `Command { std: "docker" "start" "-a" "c2947f14f0452463419aa05e49ac368c98919a0a410d5738fe6b912852f7a9fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2947f14f0452463419aa05e49ac368c98919a0a410d5738fe6b912852f7a9fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2947f14f0452463419aa05e49ac368c98919a0a410d5738fe6b912852f7a9fc", kill_on_drop: false }`
[INFO] [stdout] c2947f14f0452463419aa05e49ac368c98919a0a410d5738fe6b912852f7a9fc
[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=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] b7d63364913529b9dc8c9abb496b0f9dd11cd4522f1afb3ad411c3c468a21d98
[INFO] running `Command { std: "docker" "start" "-a" "b7d63364913529b9dc8c9abb496b0f9dd11cd4522f1afb3ad411c3c468a21d98", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.87
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust_course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `move_elements` is never used
[INFO] [stdout]   --> src/iterators/iterator_fn.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn move_elements<T>(list: Vec<T>, destination: &mut Vec<T>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `explode` is never used
[INFO] [stdout]   --> src/iterators/iterator_fn.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn explode(list: &[String]) -> Vec<Vec<String>> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_element_or` is never used
[INFO] [stdout]   --> src/iterators/iterator_fn.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn find_element_or(list: &[String], pattern: &str, fallback: String) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_language` is never used
[INFO] [stdout]   --> src/lifetimes/lifetimes_examples.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn last_language(languages: &[String]) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_language` is never used
[INFO] [stdout]   --> src/lifetimes/lifetimes_examples.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn longest_language<'a>(lang_1: &'a str, lang_2: &'a str) -> &'a str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.39s
[INFO] running `Command { std: "docker" "inspect" "b7d63364913529b9dc8c9abb496b0f9dd11cd4522f1afb3ad411c3c468a21d98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7d63364913529b9dc8c9abb496b0f9dd11cd4522f1afb3ad411c3c468a21d98", kill_on_drop: false }`
[INFO] [stdout] b7d63364913529b9dc8c9abb496b0f9dd11cd4522f1afb3ad411c3c468a21d98
[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=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] b0edbf84e1ca69690e6750e70229446fc0078be791b9a4224d77e0e13df63042
[INFO] running `Command { std: "docker" "start" "-a" "b0edbf84e1ca69690e6750e70229446fc0078be791b9a4224d77e0e13df63042", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `move_elements` is never used
[INFO] [stdout]   --> src/iterators/iterator_fn.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn move_elements<T>(list: Vec<T>, destination: &mut Vec<T>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `explode` is never used
[INFO] [stdout]   --> src/iterators/iterator_fn.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn explode(list: &[String]) -> Vec<Vec<String>> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_element_or` is never used
[INFO] [stdout]   --> src/iterators/iterator_fn.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn find_element_or(list: &[String], pattern: &str, fallback: String) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_language` is never used
[INFO] [stdout]   --> src/lifetimes/lifetimes_examples.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn last_language(languages: &[String]) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_language` is never used
[INFO] [stdout]   --> src/lifetimes/lifetimes_examples.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn longest_language<'a>(lang_1: &'a str, lang_2: &'a str) -> &'a str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "b0edbf84e1ca69690e6750e70229446fc0078be791b9a4224d77e0e13df63042", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0edbf84e1ca69690e6750e70229446fc0078be791b9a4224d77e0e13df63042", kill_on_drop: false }`
[INFO] [stdout] b0edbf84e1ca69690e6750e70229446fc0078be791b9a4224d77e0e13df63042
[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=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] 9a0e193c883b72750f4ecd6c7d6721f29ce7e2b46e2055cd7ef39093a83d5207
[INFO] running `Command { std: "docker" "start" "-a" "9a0e193c883b72750f4ecd6c7d6721f29ce7e2b46e2055cd7ef39093a83d5207", kill_on_drop: false }`
[INFO] [stderr] warning: function `move_elements` is never used
[INFO] [stderr]   --> src/iterators/iterator_fn.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn move_elements<T>(list: Vec<T>, destination: &mut Vec<T>) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `explode` is never used
[INFO] [stderr]   --> src/iterators/iterator_fn.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn explode(list: &[String]) -> Vec<Vec<String>> {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `find_element_or` is never used
[INFO] [stderr]   --> src/iterators/iterator_fn.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn find_element_or(list: &[String], pattern: &str, fallback: String) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `last_language` is never used
[INFO] [stderr]   --> src/lifetimes/lifetimes_examples.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn last_language(languages: &[String]) -> &str {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest_language` is never used
[INFO] [stderr]   --> src/lifetimes/lifetimes_examples.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn longest_language<'a>(lang_1: &'a str, lang_2: &'a str) -> &'a str {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_course` (bin "rust_course" test) generated 5 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_course-dd310505f452753d)
[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" "9a0e193c883b72750f4ecd6c7d6721f29ce7e2b46e2055cd7ef39093a83d5207", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a0e193c883b72750f4ecd6c7d6721f29ce7e2b46e2055cd7ef39093a83d5207", kill_on_drop: false }`
[INFO] [stdout] 9a0e193c883b72750f4ecd6c7d6721f29ce7e2b46e2055cd7ef39093a83d5207
