[INFO] cloning repository https://github.com/suryamajhi/mini-grep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/suryamajhi/mini-grep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuryamajhi%2Fmini-grep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuryamajhi%2Fmini-grep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec7fb763e892cfb43821069f2244ecfd9b0cdd1c
[INFO] checking suryamajhi/mini-grep against try#d7b15db413fd2070daa09a2c5b7f2ab38417429f for pr-144544
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuryamajhi%2Fmini-grep" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/suryamajhi/mini-grep
[INFO] finished tweaking git repo https://github.com/suryamajhi/mini-grep
[INFO] tweaked toml for git repo https://github.com/suryamajhi/mini-grep written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/suryamajhi/mini-grep on toolchain d7b15db413fd2070daa09a2c5b7f2ab38417429f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d7b15db413fd2070daa09a2c5b7f2ab38417429f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/suryamajhi/mini-grep 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" "+d7b15db413fd2070daa09a2c5b7f2ab38417429f" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+d7b15db413fd2070daa09a2c5b7f2ab38417429f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74850c2e71a541962981c7205ffd30e25381defc96bf7a167e2c0d442139b77e
[INFO] running `Command { std: "docker" "start" "-a" "74850c2e71a541962981c7205ffd30e25381defc96bf7a167e2c0d442139b77e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74850c2e71a541962981c7205ffd30e25381defc96bf7a167e2c0d442139b77e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74850c2e71a541962981c7205ffd30e25381defc96bf7a167e2c0d442139b77e", kill_on_drop: false }`
[INFO] [stdout] 74850c2e71a541962981c7205ffd30e25381defc96bf7a167e2c0d442139b77e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+d7b15db413fd2070daa09a2c5b7f2ab38417429f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3122c4625b5817807c40bf44ba9e4cb24f470a431a67c3f12c0b11a255a3bda2
[INFO] running `Command { std: "docker" "start" "-a" "3122c4625b5817807c40bf44ba9e4cb24f470a431a67c3f12c0b11a255a3bda2", kill_on_drop: false }`
[INFO] [stderr]     Checking mini-grep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:219:21
[INFO] [stdout]     |
[INFO] [stdout] 219 |                 let mut temp_input = input.clone();
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:219:21
[INFO] [stdout]     |
[INFO] [stdout] 219 |                 let mut temp_input = input.clone();
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Pattern` is never used
[INFO] [stdout]  --> src/pattern.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Pattern {
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PatternErr` is never used
[INFO] [stdout]   --> src/pattern.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub enum PatternErr {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Pattern` is never used
[INFO] [stdout]  --> src/pattern.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Pattern {
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PatternErr` is never used
[INFO] [stdout]   --> src/pattern.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub enum PatternErr {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "3122c4625b5817807c40bf44ba9e4cb24f470a431a67c3f12c0b11a255a3bda2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3122c4625b5817807c40bf44ba9e4cb24f470a431a67c3f12c0b11a255a3bda2", kill_on_drop: false }`
[INFO] [stdout] 3122c4625b5817807c40bf44ba9e4cb24f470a431a67c3f12c0b11a255a3bda2