[INFO] cloning repository https://github.com/LordAfterEight/equation-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LordAfterEight/equation-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLordAfterEight%2Fequation-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLordAfterEight%2Fequation-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 753e9b40f8d19eceebcb0cf9263c72f6c0b59baf
[INFO] building LordAfterEight/equation-solver against try#23647e694de8d0904848ad068b2e0ec2dd098c37+target=wasm32-wasip1 for pr-149868
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLordAfterEight%2Fequation-solver" "/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/LordAfterEight/equation-solver
[INFO] finished tweaking git repo https://github.com/LordAfterEight/equation-solver
[INFO] tweaked toml for git repo https://github.com/LordAfterEight/equation-solver written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LordAfterEight/equation-solver on toolchain 23647e694de8d0904848ad068b2e0ec2dd098c37
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23647e694de8d0904848ad068b2e0ec2dd098c37" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LordAfterEight/equation-solver 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" "+23647e694de8d0904848ad068b2e0ec2dd098c37" "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-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+23647e694de8d0904848ad068b2e0ec2dd098c37" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22562294cca1347f898eb341de5a0e6ff001aa4de3c1d03c13fe2b735178e14d
[INFO] running `Command { std: "docker" "start" "-a" "22562294cca1347f898eb341de5a0e6ff001aa4de3c1d03c13fe2b735178e14d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22562294cca1347f898eb341de5a0e6ff001aa4de3c1d03c13fe2b735178e14d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22562294cca1347f898eb341de5a0e6ff001aa4de3c1d03c13fe2b735178e14d", kill_on_drop: false }`
[INFO] [stdout] 22562294cca1347f898eb341de5a0e6ff001aa4de3c1d03c13fe2b735178e14d
[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" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+23647e694de8d0904848ad068b2e0ec2dd098c37" "build" "--frozen" "--message-format=json" "--target" "wasm32-wasip1", kill_on_drop: false }`
[INFO] [stdout] 555dc5c80e905b1e65b997d3b88458692bf17e2028606578397d6e9ebc4649fb
[INFO] running `Command { std: "docker" "start" "-a" "555dc5c80e905b1e65b997d3b88458692bf17e2028606578397d6e9ebc4649fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling equation-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: `match` arms have incompatible types
[INFO] [stdout]   --> src/equation-solver.rs:81:24
[INFO] [stdout]    |
[INFO] [stdout] 72 |               let result = match self.left_operators[i].chars().next().unwrap() {
[INFO] [stdout]    |                            ---------------------------------------------------- `match` arms have incompatible types
[INFO] [stdout] ...
[INFO] [stdout] 79 |                       Some(format!("{}", val1+val2))
[INFO] [stdout]    |                       ------------------------------ this is found to be of type `Option<String>`
[INFO] [stdout] 80 |                   },
[INFO] [stdout] 81 |                   '-' => {
[INFO] [stdout]    |  ________________________^
[INFO] [stdout] 82 | |                 },
[INFO] [stdout]    | |_________________^ expected `Option<String>`, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<String>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/equation-solver.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let mut equation = Equation::from_string(&input);
[INFO] [stdout]   |             ----^^^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/equation-solver.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let mut split: Vec<&str> = input.split("=").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 `equation-solver` (bin "equation-solver") due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "555dc5c80e905b1e65b997d3b88458692bf17e2028606578397d6e9ebc4649fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "555dc5c80e905b1e65b997d3b88458692bf17e2028606578397d6e9ebc4649fb", kill_on_drop: false }`
[INFO] [stdout] 555dc5c80e905b1e65b997d3b88458692bf17e2028606578397d6e9ebc4649fb