[INFO] fetching crate libgrep-rs 0.1.4...
[INFO] testing libgrep-rs-0.1.4 against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] extracting crate libgrep-rs 0.1.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate libgrep-rs 0.1.4 on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libgrep-rs 0.1.4
[INFO] finished tweaking crates.io crate libgrep-rs 0.1.4
[INFO] tweaked toml for crates.io crate libgrep-rs 0.1.4 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate libgrep-rs 0.1.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66e172c361f84a1e9fc5951fa058916de91f7cb37217e620b174949669f7c323
[INFO] running `Command { std: "docker" "start" "-a" "66e172c361f84a1e9fc5951fa058916de91f7cb37217e620b174949669f7c323", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66e172c361f84a1e9fc5951fa058916de91f7cb37217e620b174949669f7c323", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66e172c361f84a1e9fc5951fa058916de91f7cb37217e620b174949669f7c323", kill_on_drop: false }`
[INFO] [stdout] 66e172c361f84a1e9fc5951fa058916de91f7cb37217e620b174949669f7c323
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0aa9e7aa50378ab814dced36a6b220594ae892f561b4b1478aae4818845d91b8
[INFO] running `Command { std: "docker" "start" "-a" "0aa9e7aa50378ab814dced36a6b220594ae892f561b4b1478aae4818845d91b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling regex v1.3.7
[INFO] [stderr]    Compiling libgrep-rs v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.08s
[INFO] running `Command { std: "docker" "inspect" "0aa9e7aa50378ab814dced36a6b220594ae892f561b4b1478aae4818845d91b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aa9e7aa50378ab814dced36a6b220594ae892f561b4b1478aae4818845d91b8", kill_on_drop: false }`
[INFO] [stdout] 0aa9e7aa50378ab814dced36a6b220594ae892f561b4b1478aae4818845d91b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8af0c6e8ee922d51f353e9522a539cc19725796c78b713637a58b97f4c75f0c
[INFO] running `Command { std: "docker" "start" "-a" "b8af0c6e8ee922d51f353e9522a539cc19725796c78b713637a58b97f4c75f0c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libgrep-rs v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:179:13
[INFO] [stdout]     |
[INFO] [stdout] 179 |         let mut return_text: String = searcher.search();
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.77s
[INFO] running `Command { std: "docker" "inspect" "b8af0c6e8ee922d51f353e9522a539cc19725796c78b713637a58b97f4c75f0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8af0c6e8ee922d51f353e9522a539cc19725796c78b713637a58b97f4c75f0c", kill_on_drop: false }`
[INFO] [stdout] b8af0c6e8ee922d51f353e9522a539cc19725796c78b713637a58b97f4c75f0c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6d8173d7fe50990677f03bc146fe1f369113c18800307d1cecf18b3549568c17
[INFO] running `Command { std: "docker" "start" "-a" "6d8173d7fe50990677f03bc146fe1f369113c18800307d1cecf18b3549568c17", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:179:13
[INFO] [stderr]     |
[INFO] [stderr] 179 |         let mut return_text: String = searcher.search();
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `libgrep-rs` (lib test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/libgrep_rs-c6a46bbd88795ff2)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test tests::include ... ok
[INFO] [stdout] test tests::custom_delim ... ok
[INFO] [stderr]    Doc-tests libgrep-rs
[INFO] [stdout] test tests::case_insensitive ... ok
[INFO] [stdout] test tests::exclude ... ok
[INFO] [stdout] test tests::include_before ... ok
[INFO] [stdout] test tests::regex ... ok
[INFO] [stdout] test tests::include_after ... ok
[INFO] [stdout] test tests::show_line ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 18) - compile ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6d8173d7fe50990677f03bc146fe1f369113c18800307d1cecf18b3549568c17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d8173d7fe50990677f03bc146fe1f369113c18800307d1cecf18b3549568c17", kill_on_drop: false }`
[INFO] [stdout] 6d8173d7fe50990677f03bc146fe1f369113c18800307d1cecf18b3549568c17