[INFO] cloning repository https://github.com/peterzaccha/rust-wordle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/peterzaccha/rust-wordle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterzaccha%2Frust-wordle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterzaccha%2Frust-wordle'...
[INFO] [stderr] error: copy-fd: write returned: No space left on device
[INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/hooks/fsmonitor-watchman.sample' to '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterzaccha%2Frust-wordle/hooks/fsmonitor-watchman.sample': No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/peterzaccha/rust-wordle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/peterzaccha/rust-wordle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterzaccha%2Frust-wordle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterzaccha%2Frust-wordle'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device
[INFO] [stderr] fatal: unable to update HEAD
[WARN] Retrying crate fetch in 3 seconds (attempt 2)
[INFO] cloning repository https://github.com/peterzaccha/rust-wordle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/peterzaccha/rust-wordle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterzaccha%2Frust-wordle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterzaccha%2Frust-wordle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6c6f3b09f933cb0330d3c6975b7e58fd9648dd09
[INFO] checking peterzaccha/rust-wordle against master#64b185eddaa1d7ddf5e0c024be23b9cbba6c1722 for pr-143929
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterzaccha%2Frust-wordle" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/peterzaccha/rust-wordle
[INFO] finished tweaking git repo https://github.com/peterzaccha/rust-wordle
[INFO] tweaked toml for git repo https://github.com/peterzaccha/rust-wordle written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/peterzaccha/rust-wordle on toolchain 64b185eddaa1d7ddf5e0c024be23b9cbba6c1722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/peterzaccha/rust-wordle 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" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "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-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbd5f4320d14ee36d4747feb954ae3d78179ab5a083684a30fba5d6a8772c81c
[INFO] running `Command { std: "docker" "start" "-a" "bbd5f4320d14ee36d4747feb954ae3d78179ab5a083684a30fba5d6a8772c81c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbd5f4320d14ee36d4747feb954ae3d78179ab5a083684a30fba5d6a8772c81c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbd5f4320d14ee36d4747feb954ae3d78179ab5a083684a30fba5d6a8772c81c", kill_on_drop: false }`
[INFO] [stdout] bbd5f4320d14ee36d4747feb954ae3d78179ab5a083684a30fba5d6a8772c81c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca4e6c393af176ad6040543a8588ced80a9424187c35c82a6cd8d0c9ce63d6b0
[INFO] running `Command { std: "docker" "start" "-a" "ca4e6c393af176ad6040543a8588ced80a9424187c35c82a6cd8d0c9ce63d6b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking wordl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `filtered`
[INFO] [stdout]   --> src/solver.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |             let filtered: Vec<&str> = vec![];
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filtered`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `guess_char`
[INFO] [stdout]   --> src/solver.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             for guess_char in guess_result.word {}
[INFO] [stdout]    |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_guess_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/solver.rs:40:17
[INFO] [stdout]    |
[INFO] [stdout] 40 |             for i in &self.valid_words {}
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WordleSolver` is never constructed
[INFO] [stdout]  --> src/solver.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct WordleSolver<'a> {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `generate_guess`, and `solve` are never used
[INFO] [stdout]   --> src/solver.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<'a> WordleSolver<'a> {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(game: &'a mut WordleGame) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn generate_guess(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn solve(&mut self) -> Result<String, ()> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `filtered`
[INFO] [stdout]   --> src/solver.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |             let filtered: Vec<&str> = vec![];
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filtered`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `guess_char`
[INFO] [stdout]   --> src/solver.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             for guess_char in guess_result.word {}
[INFO] [stdout]    |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_guess_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/solver.rs:40:17
[INFO] [stdout]    |
[INFO] [stdout] 40 |             for i in &self.valid_words {}
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WordleSolver` is never constructed
[INFO] [stdout]  --> src/solver.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct WordleSolver<'a> {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `generate_guess`, and `solve` are never used
[INFO] [stdout]   --> src/solver.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<'a> WordleSolver<'a> {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(game: &'a mut WordleGame) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn generate_guess(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn solve(&mut self) -> Result<String, ()> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.30s
[INFO] running `Command { std: "docker" "inspect" "ca4e6c393af176ad6040543a8588ced80a9424187c35c82a6cd8d0c9ce63d6b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca4e6c393af176ad6040543a8588ced80a9424187c35c82a6cd8d0c9ce63d6b0", kill_on_drop: false }`
[INFO] [stdout] ca4e6c393af176ad6040543a8588ced80a9424187c35c82a6cd8d0c9ce63d6b0