[INFO] cloning repository https://github.com/koralle/wordle-solver-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/koralle/wordle-solver-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkoralle%2Fwordle-solver-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkoralle%2Fwordle-solver-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a6c174da1b19f6b71bf93624d2444a08a0c4c6f
[INFO] testing koralle/wordle-solver-rust against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkoralle%2Fwordle-solver-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/koralle/wordle-solver-rust
[INFO] finished tweaking git repo https://github.com/koralle/wordle-solver-rust
[INFO] tweaked toml for git repo https://github.com/koralle/wordle-solver-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/koralle/wordle-solver-rust on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/koralle/wordle-solver-rust 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0406dd5af5598dd1495761b15dfc90f61fdf310226c6433274a6870b3af4728d
[INFO] running `Command { std: "docker" "start" "-a" "0406dd5af5598dd1495761b15dfc90f61fdf310226c6433274a6870b3af4728d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0406dd5af5598dd1495761b15dfc90f61fdf310226c6433274a6870b3af4728d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0406dd5af5598dd1495761b15dfc90f61fdf310226c6433274a6870b3af4728d", kill_on_drop: false }`
[INFO] [stdout] 0406dd5af5598dd1495761b15dfc90f61fdf310226c6433274a6870b3af4728d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00d286958d23d37d4b1a187b8cf2984b06afce13c191da0a155557a114fa75a4
[INFO] running `Command { std: "docker" "start" "-a" "00d286958d23d37d4b1a187b8cf2984b06afce13c191da0a155557a114fa75a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling tokio v1.16.1
[INFO] [stderr]    Compiling wordle-solver-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `ErrorKind`, `Read`, and `Write`
[INFO] [stdout]  --> src/main.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, Read, Write, ErrorKind, BufReader};
[INFO] [stdout]   |                     ^^^^  ^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:13:38
[INFO] [stdout]    |
[INFO] [stdout] 13 |             Ok(word) => { res.append(word) },
[INFO] [stdout]    |                               ------ ^^^^ expected `&mut Vec<String>`, found `String`
[INFO] [stdout]    |                               |
[INFO] [stdout]    |                               arguments to this method are incorrect
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected mutable reference `&mut Vec<String>`
[INFO] [stdout]                          found struct `String`
[INFO] [stdout] note: method defined here
[INFO] [stdout]   --> /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/vec/mod.rs:2611:12
[INFO] [stdout] help: you might have meant to use `push`
[INFO] [stdout]    |
[INFO] [stdout] 13 -             Ok(word) => { res.append(word) },
[INFO] [stdout] 13 +             Ok(word) => { res.push(word) },
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: `match` arms have incompatible types
[INFO] [stdout]   --> src/main.rs:13:27
[INFO] [stdout]    |
[INFO] [stdout] 11 | /         match item {
[INFO] [stdout] 12 | |             Err(why) => Err(why),
[INFO] [stdout]    | |                         -------- this is found to be of type `Result<_, std::io::Error>`
[INFO] [stdout] 13 | |             Ok(word) => { res.append(word) },
[INFO] [stdout]    | |                           ^^^^^^^^^^^^^^^^ expected `Result<_, Error>`, found `()`
[INFO] [stdout] 14 | |         }
[INFO] [stdout]    | |_________- `match` arms have incompatible types
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Result<_, std::io::Error>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] help: try wrapping the expression in `Ok`
[INFO] [stdout]    |
[INFO] [stdout] 13 |             Ok(word) => { Ok(res.append(word)) },
[INFO] [stdout]    |                           +++                +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut file = match File::open(dict_file_name) {
[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/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut words: Vec<io::Result<String>> = BufReader::new(file).lines().collect();
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wordle-solver-rust` (bin "wordle-solver-rust") due to 2 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "00d286958d23d37d4b1a187b8cf2984b06afce13c191da0a155557a114fa75a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00d286958d23d37d4b1a187b8cf2984b06afce13c191da0a155557a114fa75a4", kill_on_drop: false }`
[INFO] [stdout] 00d286958d23d37d4b1a187b8cf2984b06afce13c191da0a155557a114fa75a4
