[INFO] cloning repository https://github.com/zeng-y-l/tytro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zeng-y-l/tytro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeng-y-l%2Ftytro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeng-y-l%2Ftytro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09335d039b21ce18f6f5bf78f537122d98563a0e
[INFO] checking zeng-y-l/tytro against try#50f413885985a8b0a0b6ca0766a0aedd45304953 for pr-155657-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzeng-y-l%2Ftytro" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zeng-y-l/tytro
[INFO] finished tweaking git repo https://github.com/zeng-y-l/tytro
[INFO] tweaked toml for git repo https://github.com/zeng-y-l/tytro written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zeng-y-l/tytro on toolchain 50f413885985a8b0a0b6ca0766a0aedd45304953
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zeng-y-l/tytro 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" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe8c039b30d81026769211bb72d212554a010040955915ba18f7daafba75feb9
[INFO] running `Command { std: "docker" "start" "-a" "fe8c039b30d81026769211bb72d212554a010040955915ba18f7daafba75feb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe8c039b30d81026769211bb72d212554a010040955915ba18f7daafba75feb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe8c039b30d81026769211bb72d212554a010040955915ba18f7daafba75feb9", kill_on_drop: false }`
[INFO] [stdout] fe8c039b30d81026769211bb72d212554a010040955915ba18f7daafba75feb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4549ecf3150df7fca041f1f4ec2c234939a57e98f6935ae1026c82f0bc06e93f
[INFO] running `Command { std: "docker" "start" "-a" "4549ecf3150df7fca041f1f4ec2c234939a57e98f6935ae1026c82f0bc06e93f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.102
[INFO] [stderr]     Checking tytro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]  --> tests/list.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[tytro]
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   | |
[INFO] [stdout]   | unreachable call
[INFO] [stdout]   | any code following this expression is unreachable
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]   = note: this warning originates in the attribute macro `tytro` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0004]: non-exhaustive patterns: type `()` is non-empty
[INFO] [stdout]  --> tests/list.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | / enum List<T> {
[INFO] [stdout] 5 | |     Nil,
[INFO] [stdout] 6 | |     Cons(T, Self),
[INFO] [stdout] 7 | | }
[INFO] [stdout]   | |_^
[INFO] [stdout]   |
[INFO] [stdout]   = note: the matched value is of type `()`
[INFO] [stdout] help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown
[INFO] [stdout]   |
[INFO] [stdout] 7 ~ } {
[INFO] [stdout] 8 +     _ => todo!(),
[INFO] [stdout] 9 + }
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0004`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tytro` (test "list") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "4549ecf3150df7fca041f1f4ec2c234939a57e98f6935ae1026c82f0bc06e93f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4549ecf3150df7fca041f1f4ec2c234939a57e98f6935ae1026c82f0bc06e93f", kill_on_drop: false }`
[INFO] [stdout] 4549ecf3150df7fca041f1f4ec2c234939a57e98f6935ae1026c82f0bc06e93f
