[INFO] cloning repository https://github.com/kongchenglc/rust-grep-cli
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kongchenglc/rust-grep-cli" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkongchenglc%2Frust-grep-cli", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkongchenglc%2Frust-grep-cli'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7fb827775abdee5aea44ef303cf1d4f80ac3551f
[INFO] checking kongchenglc/rust-grep-cli against master#4ecd70ddd1039a3954056c1071e40278048476fa for pr-137633
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkongchenglc%2Frust-grep-cli" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kongchenglc/rust-grep-cli on toolchain 4ecd70ddd1039a3954056c1071e40278048476fa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kongchenglc/rust-grep-cli
[INFO] finished tweaking git repo https://github.com/kongchenglc/rust-grep-cli
[INFO] tweaked toml for git repo https://github.com/kongchenglc/rust-grep-cli written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kongchenglc/rust-grep-cli 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" "+4ecd70ddd1039a3954056c1071e40278048476fa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00c95776681be88614a986639fa513325767703b6c81aa28c4845ec44919c955
[INFO] running `Command { std: "docker" "start" "-a" "00c95776681be88614a986639fa513325767703b6c81aa28c4845ec44919c955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00c95776681be88614a986639fa513325767703b6c81aa28c4845ec44919c955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00c95776681be88614a986639fa513325767703b6c81aa28c4845ec44919c955", kill_on_drop: false }`
[INFO] [stdout] 00c95776681be88614a986639fa513325767703b6c81aa28c4845ec44919c955
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+4ecd70ddd1039a3954056c1071e40278048476fa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fbe7e41ecda38552c32dbbc581fa5c41bfdb8daa8b82969997af4fd8ee516ebb
[INFO] running `Command { std: "docker" "start" "-a" "fbe7e41ecda38552c32dbbc581fa5c41bfdb8daa8b82969997af4fd8ee516ebb", kill_on_drop: false }`
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/lib.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |         if (args.len() < 3) {
[INFO] [stdout]    |            ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 32 -         if (args.len() < 3) {
[INFO] [stdout] 32 +         if args.len() < 3 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/lib.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |         if (args.len() < 3) {
[INFO] [stdout]    |            ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 32 -         if (args.len() < 3) {
[INFO] [stdout] 32 +         if args.len() < 3 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "fbe7e41ecda38552c32dbbc581fa5c41bfdb8daa8b82969997af4fd8ee516ebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbe7e41ecda38552c32dbbc581fa5c41bfdb8daa8b82969997af4fd8ee516ebb", kill_on_drop: false }`
[INFO] [stdout] fbe7e41ecda38552c32dbbc581fa5c41bfdb8daa8b82969997af4fd8ee516ebb