[INFO] fetching crate rohit_grep 0.1.0...
[INFO] checking rohit_grep-0.1.0 against try#987a165cfab916796a8315782b83ac460a651ce2 for pr-145262
[INFO] extracting crate rohit_grep 0.1.0 into /workspace/builds/worker-5-tc2/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-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rohit_grep 0.1.0 on toolchain 987a165cfab916796a8315782b83ac460a651ce2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+987a165cfab916796a8315782b83ac460a651ce2" "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" "+987a165cfab916796a8315782b83ac460a651ce2" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+987a165cfab916796a8315782b83ac460a651ce2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef4f968d9065e8a23668aba8727b1b78b4f6d99d31e90eb6e28b3c21f0c01597
[INFO] running `Command { std: "docker" "start" "-a" "ef4f968d9065e8a23668aba8727b1b78b4f6d99d31e90eb6e28b3c21f0c01597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef4f968d9065e8a23668aba8727b1b78b4f6d99d31e90eb6e28b3c21f0c01597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef4f968d9065e8a23668aba8727b1b78b4f6d99d31e90eb6e28b3c21f0c01597", kill_on_drop: false }`
[INFO] [stdout] ef4f968d9065e8a23668aba8727b1b78b4f6d99d31e90eb6e28b3c21f0c01597
[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=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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+987a165cfab916796a8315782b83ac460a651ce2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 480e0252a488746111ee3f42760795cb8c6fb53485fa8f83fa175f1b1a103982
[INFO] running `Command { std: "docker" "start" "-a" "480e0252a488746111ee3f42760795cb8c6fb53485fa8f83fa175f1b1a103982", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]     Checking anstyle v1.0.8
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking log v0.4.22
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking predicates-core v1.0.8
[INFO] [stderr]     Checking bitflags v2.6.0
[INFO] [stderr]    Compiling rustix v0.38.37
[INFO] [stderr]     Checking utf8parse v0.2.2
[INFO] [stderr]     Checking colorchoice v1.0.2
[INFO] [stderr]     Checking linux-raw-sys v0.4.14
[INFO] [stderr]     Checking anstyle-parse v0.2.5
[INFO] [stderr]     Checking anstyle-query v1.1.1
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking is_terminal_polyfill v1.70.1
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling portable-atomic v1.7.0
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking fastrand v2.1.1
[INFO] [stderr]     Checking predicates-tree v1.0.11
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking anstream v0.6.15
[INFO] [stderr]     Checking clap_lex v0.7.2
[INFO] [stderr]     Checking unicode-width v0.1.13
[INFO] [stderr]     Checking strsim v0.11.1
[INFO] [stderr]     Checking once_cell v1.20.0
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling anyhow v1.0.89
[INFO] [stderr]    Compiling assert_cmd v2.0.16
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]     Checking clap_builder v4.5.17
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking console v0.15.8
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking indicatif v0.17.8
[INFO] [stderr]     Checking tempfile v3.12.0
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]    Compiling clap_derive v4.5.13
[INFO] [stderr]     Checking bstr v1.10.0
[INFO] [stderr]     Checking regex v1.10.6
[INFO] [stderr]     Checking predicates v3.1.2
[INFO] [stderr]     Checking globset v0.4.15
[INFO] [stderr]     Checking ignore v0.4.23
[INFO] [stderr]     Checking clap v4.5.17
[INFO] [stderr]     Checking globwalk v0.9.1
[INFO] [stderr]     Checking assert_fs v1.1.2
[INFO] [stderr]     Checking 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)]` 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] [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)]` 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 10.97s
[INFO] running `Command { std: "docker" "inspect" "480e0252a488746111ee3f42760795cb8c6fb53485fa8f83fa175f1b1a103982", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "480e0252a488746111ee3f42760795cb8c6fb53485fa8f83fa175f1b1a103982", kill_on_drop: false }`
[INFO] [stdout] 480e0252a488746111ee3f42760795cb8c6fb53485fa8f83fa175f1b1a103982