[INFO] updating cached repository https://github.com/courajs/urbit-1
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1a2e28c004f7b3d54dbb1d030f01aaa03d13ef02
[INFO] checking courajs/urbit-1 against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcourajs%2Furbit-1" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/courajs/urbit-1 on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/courajs/urbit-1
[INFO] finished tweaking git repo https://github.com/courajs/urbit-1
[INFO] tweaked toml for git repo https://github.com/courajs/urbit-1 written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/courajs/urbit-1 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4ba3c6412a543d5b201cecb364767fb1be9e10bfeb9ae263839912282fadd0fd
[INFO] running `"docker" "start" "-a" "4ba3c6412a543d5b201cecb364767fb1be9e10bfeb9ae263839912282fadd0fd"`
[INFO] [stderr]     Checking urbit-1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/main.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | / macro_rules! noun {
[INFO] [stderr] 8  | |     ()                           => {};
[INFO] [stderr] 9  | |     ($it:literal)                => { Rc::new(Noun::Atom($it)) };
[INFO] [stderr] 10 | |     ($it:literal $($rest:tt)*)   => { Rc::new(Noun::Cell(noun!($it), noun!($($rest)*))) };
[INFO] [stderr] ...  |
[INFO] [stderr] 18 | |     ({$($sub:tt)*} $($rest:tt)*) => { noun!([$($sub)*] $($rest)*) };
[INFO] [stderr] 19 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `urbit_1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `src/main.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: Could not compile `urbit-1`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]   --> src/main.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn value(&self) -> Result<u128, &'static str> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `open`
[INFO] [stderr]   --> src/main.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn open(&self) -> Result<(&Rc<Noun>,&Rc<Noun>), &'static str> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `left`
[INFO] [stderr]   --> src/main.rs:51:10
[INFO] [stderr]    |
[INFO] [stderr] 51 |   Cons { left: Box<Application>, right: Box<Application> },
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `right`
[INFO] [stderr]   --> src/main.rs:51:34
[INFO] [stderr]    |
[INFO] [stderr] 51 |   Cons { left: Box<Application>, right: Box<Application> },
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `op`
[INFO] [stderr]   --> src/main.rs:66:3
[INFO] [stderr]    |
[INFO] [stderr] 66 |   op: Op,
[INFO] [stderr]    |   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `reason`
[INFO] [stderr]   --> src/main.rs:67:3
[INFO] [stderr]    |
[INFO] [stderr] 67 |   reason: String,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `subject`
[INFO] [stderr]   --> src/main.rs:68:3
[INFO] [stderr]    |
[INFO] [stderr] 68 |   subject: Rc<Noun>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `subject`
[INFO] [stderr]   --> src/main.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     subject: Rc<Noun>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `formula`
[INFO] [stderr]   --> src/main.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     formula: Rc<Noun>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `output`
[INFO] [stderr]   --> src/main.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     output: Option<Result<Rc<Noun>, String>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4ba3c6412a543d5b201cecb364767fb1be9e10bfeb9ae263839912282fadd0fd"`
[INFO] running `"docker" "rm" "-f" "4ba3c6412a543d5b201cecb364767fb1be9e10bfeb9ae263839912282fadd0fd"`
[INFO] [stdout] 4ba3c6412a543d5b201cecb364767fb1be9e10bfeb9ae263839912282fadd0fd