[INFO] fetching crate rohit_grep 0.1.0...
[INFO] building rohit_grep-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate rohit_grep 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate rohit_grep 0.1.0
[INFO] finished tweaking crates.io crate rohit_grep 0.1.0
[INFO] tweaked toml for crates.io crate rohit_grep 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rohit_grep 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rohit_grep 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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert_fs v1.1.2
[INFO] [stderr]   Downloaded indicatif v0.17.8
[INFO] [stderr]   Downloaded globset v0.4.15
[INFO] [stderr]   Downloaded once_cell v1.20.0
[INFO] [stderr]   Downloaded clap v4.5.17
[INFO] [stderr]   Downloaded portable-atomic v1.7.0
[INFO] [stderr]   Downloaded bstr v1.10.0
[INFO] [stderr]   Downloaded clap_builder v4.5.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f9a4305cfe3fd481de865cd278f966131c3334cda706ae88909c36b299f363c
[INFO] running `Command { std: "docker" "start" "-a" "5f9a4305cfe3fd481de865cd278f966131c3334cda706ae88909c36b299f363c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f9a4305cfe3fd481de865cd278f966131c3334cda706ae88909c36b299f363c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f9a4305cfe3fd481de865cd278f966131c3334cda706ae88909c36b299f363c", kill_on_drop: false }`
[INFO] [stdout] 5f9a4305cfe3fd481de865cd278f966131c3334cda706ae88909c36b299f363c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d7fee4e7037c9c67868fe378d718fda3fcef913d0bee50677649cf4c3c2f7d4
[INFO] running `Command { std: "docker" "start" "-a" "7d7fee4e7037c9c67868fe378d718fda3fcef913d0bee50677649cf4c3c2f7d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling regex-syntax v0.8.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling predicates-core v1.0.8
[INFO] [stderr]    Compiling rustix v0.38.37
[INFO] [stderr]    Compiling termtree v0.4.1
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling difflib v0.4.0
[INFO] [stderr]    Compiling portable-atomic v1.7.0
[INFO] [stderr]    Compiling assert_cmd v2.0.16
[INFO] [stderr]    Compiling once_cell v1.20.0
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling unicode-width v0.1.13
[INFO] [stderr]    Compiling clap_builder v4.5.17
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling number_prefix v0.4.0
[INFO] [stderr]    Compiling console v0.15.8
[INFO] [stderr]    Compiling predicates-tree v1.0.11
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling indicatif v0.17.8
[INFO] [stderr]    Compiling regex-automata v0.4.7
[INFO] [stderr]    Compiling tempfile v3.12.0
[INFO] [stderr]    Compiling clap_derive v4.5.13
[INFO] [stderr]    Compiling clap v4.5.17
[INFO] [stderr]    Compiling bstr v1.10.0
[INFO] [stderr]    Compiling regex v1.10.6
[INFO] [stderr]    Compiling predicates v3.1.2
[INFO] [stderr]    Compiling globset v0.4.15
[INFO] [stderr]    Compiling ignore v0.4.23
[INFO] [stderr]    Compiling globwalk v0.9.1
[INFO] [stderr]    Compiling assert_fs v1.1.2
[INFO] [stderr]    Compiling rohit_grep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 4 |             let _ = writeln!(writer, "{}", line);
[INFO] [stdout]   |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.46s
[INFO] running `Command { std: "docker" "inspect" "7d7fee4e7037c9c67868fe378d718fda3fcef913d0bee50677649cf4c3c2f7d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d7fee4e7037c9c67868fe378d718fda3fcef913d0bee50677649cf4c3c2f7d4", kill_on_drop: false }`
[INFO] [stdout] 7d7fee4e7037c9c67868fe378d718fda3fcef913d0bee50677649cf4c3c2f7d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91f0f0acd62699aa4cfaf7cf9bff40da52f9d0ec7c786eb1c28b612491744de3
[INFO] running `Command { std: "docker" "start" "-a" "91f0f0acd62699aa4cfaf7cf9bff40da52f9d0ec7c786eb1c28b612491744de3", kill_on_drop: false }`
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 4 |             let _ = writeln!(writer, "{}", line);
[INFO] [stdout]   |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rohit_grep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 4 |             let _ = writeln!(writer, "{}", line);
[INFO] [stdout]   |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "91f0f0acd62699aa4cfaf7cf9bff40da52f9d0ec7c786eb1c28b612491744de3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91f0f0acd62699aa4cfaf7cf9bff40da52f9d0ec7c786eb1c28b612491744de3", kill_on_drop: false }`
[INFO] [stdout] 91f0f0acd62699aa4cfaf7cf9bff40da52f9d0ec7c786eb1c28b612491744de3