[INFO] cloning repository https://github.com/sgp715/word_frequencies
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sgp715/word_frequencies" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgp715%2Fword_frequencies", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgp715%2Fword_frequencies'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f9a9111e36616f2ceffd044f16a80c15b18b05a
[INFO] testing sgp715/word_frequencies against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsgp715%2Fword_frequencies" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sgp715/word_frequencies 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 git repo https://github.com/sgp715/word_frequencies
[INFO] finished tweaking git repo https://github.com/sgp715/word_frequencies
[INFO] tweaked toml for git repo https://github.com/sgp715/word_frequencies written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/sgp715/word_frequencies 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 6065f7ac9695f014923c4e4bfe53b184db8194c6474d0e2adf57c97fb2cfbd0d
[INFO] running `Command { std: "docker" "start" "-a" "6065f7ac9695f014923c4e4bfe53b184db8194c6474d0e2adf57c97fb2cfbd0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6065f7ac9695f014923c4e4bfe53b184db8194c6474d0e2adf57c97fb2cfbd0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6065f7ac9695f014923c4e4bfe53b184db8194c6474d0e2adf57c97fb2cfbd0d", kill_on_drop: false }`
[INFO] [stdout] 6065f7ac9695f014923c4e4bfe53b184db8194c6474d0e2adf57c97fb2cfbd0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 15a8aadbef5c8e5707c215c583b9c00f6f60a3b25f8fdeedfa0d8ec8a11b95b9
[INFO] running `Command { std: "docker" "start" "-a" "15a8aadbef5c8e5707c215c583b9c00f6f60a3b25f8fdeedfa0d8ec8a11b95b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling hw1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let mut split_line = line.split(" ");
[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 dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "15a8aadbef5c8e5707c215c583b9c00f6f60a3b25f8fdeedfa0d8ec8a11b95b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15a8aadbef5c8e5707c215c583b9c00f6f60a3b25f8fdeedfa0d8ec8a11b95b9", kill_on_drop: false }`
[INFO] [stdout] 15a8aadbef5c8e5707c215c583b9c00f6f60a3b25f8fdeedfa0d8ec8a11b95b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 6bb1584482311686ce932e7ea47acc978f6d505a85a82839e29ff30416d3f86f
[INFO] running `Command { std: "docker" "start" "-a" "6bb1584482311686ce932e7ea47acc978f6d505a85a82839e29ff30416d3f86f", kill_on_drop: false }`
[INFO] [stderr]    Compiling hw1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let mut split_line = line.split(" ");
[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: function is never used: `blank`
[INFO] [stdout]    --> src/main.rs:190:12
[INFO] [stdout]     |
[INFO] [stdout] 190 |         fn blank() {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "6bb1584482311686ce932e7ea47acc978f6d505a85a82839e29ff30416d3f86f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bb1584482311686ce932e7ea47acc978f6d505a85a82839e29ff30416d3f86f", kill_on_drop: false }`
[INFO] [stdout] 6bb1584482311686ce932e7ea47acc978f6d505a85a82839e29ff30416d3f86f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 0e929a9546eb4bec016249952bd3079e07ac50a60ea5700531a3cad07c007bc8
[INFO] running `Command { std: "docker" "start" "-a" "0e929a9546eb4bec016249952bd3079e07ac50a60ea5700531a3cad07c007bc8", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let mut split_line = line.split(" ");
[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: function is never used: `blank`
[INFO] [stderr]    --> src/main.rs:190:12
[INFO] [stderr]     |
[INFO] [stderr] 190 |         fn blank() {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `hw1` (bin "hw1" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hw1-8a51972f7afd61a0)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test cleaned_words_tests::blank ... ok
[INFO] [stdout] test cleaned_words_tests::basic ... ok
[INFO] [stdout] test cleaned_words_tests::punctuation ... ok
[INFO] [stdout] test count_frequencies_tests::blank ... ok
[INFO] [stdout] test read_words_tests::reads ... ok
[INFO] [stdout] test count_frequencies_tests::count ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0e929a9546eb4bec016249952bd3079e07ac50a60ea5700531a3cad07c007bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e929a9546eb4bec016249952bd3079e07ac50a60ea5700531a3cad07c007bc8", kill_on_drop: false }`
[INFO] [stdout] 0e929a9546eb4bec016249952bd3079e07ac50a60ea5700531a3cad07c007bc8