[INFO] cloning repository https://github.com/ddprrt/rust_jku_ws20252026
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ddprrt/rust_jku_ws20252026" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Frust_jku_ws20252026", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Frust_jku_ws20252026'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 75cf02a92d1d0769c3e541f64395f8cd36adb662
[INFO] checking ddprrt/rust_jku_ws20252026 against try#4907eac94165faff6c5e5e015670b1c584275f7b for pr-154149
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Frust_jku_ws20252026" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ddprrt/rust_jku_ws20252026
[INFO] finished tweaking git repo https://github.com/ddprrt/rust_jku_ws20252026
[INFO] tweaked toml for git repo https://github.com/ddprrt/rust_jku_ws20252026 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ddprrt/rust_jku_ws20252026 on toolchain 4907eac94165faff6c5e5e015670b1c584275f7b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ddprrt/rust_jku_ws20252026 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" "+4907eac94165faff6c5e5e015670b1c584275f7b" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+4907eac94165faff6c5e5e015670b1c584275f7b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea770ef8efe1b9a22cd69aec07f89f4ca543abbf744c1478fc2aba5d21b6550f
[INFO] running `Command { std: "docker" "start" "-a" "ea770ef8efe1b9a22cd69aec07f89f4ca543abbf744c1478fc2aba5d21b6550f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea770ef8efe1b9a22cd69aec07f89f4ca543abbf744c1478fc2aba5d21b6550f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea770ef8efe1b9a22cd69aec07f89f4ca543abbf744c1478fc2aba5d21b6550f", kill_on_drop: false }`
[INFO] [stdout] ea770ef8efe1b9a22cd69aec07f89f4ca543abbf744c1478fc2aba5d21b6550f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+4907eac94165faff6c5e5e015670b1c584275f7b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 989798ea77be4133c5653e51dc673c7c8fd31e0e317a05f4dcfcbb9cc93df4dc
[INFO] running `Command { std: "docker" "start" "-a" "989798ea77be4133c5653e51dc673c7c8fd31e0e317a05f4dcfcbb9cc93df4dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]    Compiling zerocopy v0.8.31
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]     Checking jku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/billable.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub struct Person {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 65 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/billable.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub struct Person {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 65 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `multithreading_example_no_mutex`
[INFO] [stdout]  --> src/main.rs:3:49
[INFO] [stdout]   |
[INFO] [stdout] 3 | use jku::concurrency::{multithreading_channels, multithreading_example_no_mutex};
[INFO] [stdout]   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `multithreading_example_no_mutex`
[INFO] [stdout]  --> src/main.rs:3:49
[INFO] [stdout]   |
[INFO] [stdout] 3 | use jku::concurrency::{multithreading_channels, multithreading_example_no_mutex};
[INFO] [stdout]   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `el`
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     for el in v.iter().printable() {}
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_el`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `el`
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     for el in v.iter().printable() {}
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_el`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.95s
[INFO] running `Command { std: "docker" "inspect" "989798ea77be4133c5653e51dc673c7c8fd31e0e317a05f4dcfcbb9cc93df4dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "989798ea77be4133c5653e51dc673c7c8fd31e0e317a05f4dcfcbb9cc93df4dc", kill_on_drop: false }`
[INFO] [stdout] 989798ea77be4133c5653e51dc673c7c8fd31e0e317a05f4dcfcbb9cc93df4dc