[INFO] cloning repository https://github.com/ProfMYK/frost
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ProfMYK/frost" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FProfMYK%2Ffrost", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FProfMYK%2Ffrost'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 85edff5d84717bc84631785bb53b869a66fd6b58
[INFO] fixing ProfMYK/frost against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FProfMYK%2Ffrost" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ProfMYK/frost
[INFO] finished tweaking git repo https://github.com/ProfMYK/frost
[INFO] tweaked toml for git repo https://github.com/ProfMYK/frost written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ProfMYK/frost on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ProfMYK/frost 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" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 8debb7a3eec8524115e93b743f4f9ee5fe9af1245f050b86422560772e79d0c1
[INFO] running `Command { std: "docker" "start" "8debb7a3eec8524115e93b743f4f9ee5fe9af1245f050b86422560772e79d0c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8debb7a3eec8524115e93b743f4f9ee5fe9af1245f050b86422560772e79d0c1" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8debb7a3eec8524115e93b743f4f9ee5fe9af1245f050b86422560772e79d0c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8debb7a3eec8524115e93b743f4f9ee5fe9af1245f050b86422560772e79d0c1" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]     Checking thiserror v2.0.18
[INFO] [stderr]     Checking frost v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a closure that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/evaluator.rs:106:87
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let arguments: Vec<(String, Object)> = args.iter().map(|(s, e)| (*s, eval_type(*e)?)).collect();
[INFO] [stdout]     |                                                            --------                   ^ cannot use the `?` operator in a closure that returns `(String, object::Object)`
[INFO] [stdout]     |                                                            |
[INFO] [stdout]     |                                                            this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/evaluator.rs:105:137
[INFO] [stdout]     |
[INFO] [stdout] 105 | fn eval_function(name: String, args: Vec<(String, Expression)>, body: Expression, return_type: Option<Box<Expression>>, env: EnvRef) -> Result<Object, EvalError> {
[INFO] [stdout]     |    ------------- implicitly returns `()` as its body has no tail or `return` expression                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result<Object, EvalError>`, found `()`
[INFO] [stdout]     |
[INFO] [stdout]     = note:   expected enum `Result<object::Object, EvalError>`
[INFO] [stdout]             found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `frost` (bin "frost") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a closure that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]    --> src/evaluator.rs:106:87
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let arguments: Vec<(String, Object)> = args.iter().map(|(s, e)| (*s, eval_type(*e)?)).collect();
[INFO] [stdout]     |                                                            --------                   ^ cannot use the `?` operator in a closure that returns `(String, object::Object)`
[INFO] [stdout]     |                                                            |
[INFO] [stdout]     |                                                            this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/evaluator.rs:105:137
[INFO] [stdout]     |
[INFO] [stdout] 105 | fn eval_function(name: String, args: Vec<(String, Expression)>, body: Expression, return_type: Option<Box<Expression>>, env: EnvRef) -> Result<Object, EvalError> {
[INFO] [stdout]     |    ------------- implicitly returns `()` as its body has no tail or `return` expression                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result<Object, EvalError>`, found `()`
[INFO] [stdout]     |
[INFO] [stdout]     = note:   expected enum `Result<object::Object, EvalError>`
[INFO] [stdout]             found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `frost` (bin "frost" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8debb7a3eec8524115e93b743f4f9ee5fe9af1245f050b86422560772e79d0c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8debb7a3eec8524115e93b743f4f9ee5fe9af1245f050b86422560772e79d0c1", kill_on_drop: false }`
[INFO] [stdout] 8debb7a3eec8524115e93b743f4f9ee5fe9af1245f050b86422560772e79d0c1
