[INFO] fetching crate rfetch-rs 0.1.0...
[INFO] testing rfetch-rs-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rfetch-rs 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate rfetch-rs 0.1.0
[INFO] finished tweaking crates.io crate rfetch-rs 0.1.0
[INFO] tweaked toml for crates.io crate rfetch-rs 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rfetch-rs 0.1.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rfetch-rs 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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 681f7b4f5e7a7ed790c00d084162e1880ea5af9630c1b9c8bdd5a0318bb8323e
[INFO] running `Command { std: "docker" "start" "-a" "681f7b4f5e7a7ed790c00d084162e1880ea5af9630c1b9c8bdd5a0318bb8323e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "681f7b4f5e7a7ed790c00d084162e1880ea5af9630c1b9c8bdd5a0318bb8323e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "681f7b4f5e7a7ed790c00d084162e1880ea5af9630c1b9c8bdd5a0318bb8323e", kill_on_drop: false }`
[INFO] [stdout] 681f7b4f5e7a7ed790c00d084162e1880ea5af9630c1b9c8bdd5a0318bb8323e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e3eaf6c0274d99c1d33a3bf74e68d1ed4f4e60feeb38d066912762c49050777
[INFO] running `Command { std: "docker" "start" "-a" "1e3eaf6c0274d99c1d33a3bf74e68d1ed4f4e60feeb38d066912762c49050777", kill_on_drop: false }`
[INFO] [stderr]    Compiling rfetch-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `content` is never read
[INFO] [stdout]   --> src/main.rs:7:23
[INFO] [stdout]    |
[INFO] [stdout]  7 |     let mut content = String::new();
[INFO] [stdout]    |                       ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 11 |         content = fs::read_to_string("/etc/os-release").expect("unknown");
[INFO] [stdout]    |         ------- `content` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `var` is never read
[INFO] [stdout]   --> src/main.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |    let mut var = String::new();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] 27 |    if let Ok(variable) = env::var(var_name) {
[INFO] [stdout] 28 |        var = variable
[INFO] [stdout]    |        --- `var` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "1e3eaf6c0274d99c1d33a3bf74e68d1ed4f4e60feeb38d066912762c49050777", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e3eaf6c0274d99c1d33a3bf74e68d1ed4f4e60feeb38d066912762c49050777", kill_on_drop: false }`
[INFO] [stdout] 1e3eaf6c0274d99c1d33a3bf74e68d1ed4f4e60feeb38d066912762c49050777
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f3ee64c24571a29b1e8d5c9fc8c6ab9717a38ad76958717e7e50d13a6d2b4bf
[INFO] running `Command { std: "docker" "start" "-a" "8f3ee64c24571a29b1e8d5c9fc8c6ab9717a38ad76958717e7e50d13a6d2b4bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling rfetch-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `content` is never read
[INFO] [stdout]   --> src/main.rs:7:23
[INFO] [stdout]    |
[INFO] [stdout]  7 |     let mut content = String::new();
[INFO] [stdout]    |                       ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 11 |         content = fs::read_to_string("/etc/os-release").expect("unknown");
[INFO] [stdout]    |         ------- `content` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `var` is never read
[INFO] [stdout]   --> src/main.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |    let mut var = String::new();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] 27 |    if let Ok(variable) = env::var(var_name) {
[INFO] [stdout] 28 |        var = variable
[INFO] [stdout]    |        --- `var` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "8f3ee64c24571a29b1e8d5c9fc8c6ab9717a38ad76958717e7e50d13a6d2b4bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f3ee64c24571a29b1e8d5c9fc8c6ab9717a38ad76958717e7e50d13a6d2b4bf", kill_on_drop: false }`
[INFO] [stdout] 8f3ee64c24571a29b1e8d5c9fc8c6ab9717a38ad76958717e7e50d13a6d2b4bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 254e28542192fc02cf4fa442e44c16923d24834722ab57fdd261230fb81cf516
[INFO] running `Command { std: "docker" "start" "-a" "254e28542192fc02cf4fa442e44c16923d24834722ab57fdd261230fb81cf516", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `content` is never read
[INFO] [stderr]   --> src/main.rs:7:23
[INFO] [stderr]    |
[INFO] [stderr]  7 |     let mut content = String::new();
[INFO] [stderr]    |                       ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 11 |         content = fs::read_to_string("/etc/os-release").expect("unknown");
[INFO] [stderr]    |         ------- `content` is overwritten here before the previous value is read
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `var` is never read
[INFO] [stderr]   --> src/main.rs:26:18
[INFO] [stderr]    |
[INFO] [stderr] 26 |    let mut var = String::new();
[INFO] [stderr]    |                  ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stderr] 27 |    if let Ok(variable) = env::var(var_name) {
[INFO] [stderr] 28 |        var = variable
[INFO] [stderr]    |        --- `var` is overwritten here before the previous value is read
[INFO] [stderr] 
[INFO] [stderr] warning: `rfetch-rs` (bin "rfetch" test) generated 2 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/rfetch-adc8e1d15fe24661)
[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" "254e28542192fc02cf4fa442e44c16923d24834722ab57fdd261230fb81cf516", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "254e28542192fc02cf4fa442e44c16923d24834722ab57fdd261230fb81cf516", kill_on_drop: false }`
[INFO] [stdout] 254e28542192fc02cf4fa442e44c16923d24834722ab57fdd261230fb81cf516
