[INFO] fetching crate roland-rs 0.1.0...
[INFO] testing roland-rs-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate roland-rs 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate roland-rs 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate roland-rs 0.1.0
[INFO] tweaked toml for crates.io crate roland-rs 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate roland-rs 0.1.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate roland-rs 0.1.0 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" "+beta-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca8199b247a1175319b19672b1486eeb217505a2196714d3feab6a27b64e55f3
[INFO] running `Command { std: "docker" "start" "-a" "ca8199b247a1175319b19672b1486eeb217505a2196714d3feab6a27b64e55f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca8199b247a1175319b19672b1486eeb217505a2196714d3feab6a27b64e55f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca8199b247a1175319b19672b1486eeb217505a2196714d3feab6a27b64e55f3", kill_on_drop: false }`
[INFO] [stdout] ca8199b247a1175319b19672b1486eeb217505a2196714d3feab6a27b64e55f3
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97822c9579fbafa036aa0d18c61870b98abc14a863dda292b5a31feaacf8aa01
[INFO] running `Command { std: "docker" "start" "-a" "97822c9579fbafa036aa0d18c61870b98abc14a863dda292b5a31feaacf8aa01", kill_on_drop: false }`
[INFO] [stderr]    Compiling roland-core v0.1.0
[INFO] [stderr]    Compiling roland-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `roland_core::*`
[INFO] [stdout]  --> src/lib.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use roland_core::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "97822c9579fbafa036aa0d18c61870b98abc14a863dda292b5a31feaacf8aa01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97822c9579fbafa036aa0d18c61870b98abc14a863dda292b5a31feaacf8aa01", kill_on_drop: false }`
[INFO] [stdout] 97822c9579fbafa036aa0d18c61870b98abc14a863dda292b5a31feaacf8aa01
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12a5fdb62a7e33d000047810a5918c1ebff3674df4d57c550d6dd03ccc8d12d5
[INFO] running `Command { std: "docker" "start" "-a" "12a5fdb62a7e33d000047810a5918c1ebff3674df4d57c550d6dd03ccc8d12d5", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `roland_core::*`
[INFO] [stdout]  --> src/lib.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use roland_core::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling roland-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `roland_core::*`
[INFO] [stdout]  --> src/lib.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub use roland_core::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Communication` found for enum `RolandError` in the current scope
[INFO] [stdout]   --> examples/telnet_client.rs:29:39
[INFO] [stdout]    |
[INFO] [stdout] 29 |             .map_err(|e| RolandError::Communication(format!("Failed to connect: {}", e)))?;
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^ variant, associated function, or constant not found in `RolandError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Communication` found for enum `RolandError` in the current scope
[INFO] [stdout]   --> examples/telnet_client.rs:33:39
[INFO] [stdout]    |
[INFO] [stdout] 33 |             .map_err(|e| RolandError::Communication(format!("Failed to set timeout: {}", e)))?;
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^ variant, associated function, or constant not found in `RolandError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Communication` found for enum `RolandError` in the current scope
[INFO] [stdout]   --> examples/telnet_client.rs:37:39
[INFO] [stdout]    |
[INFO] [stdout] 37 |             .map_err(|e| RolandError::Communication(format!("Failed to set timeout: {}", e)))?;
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^ variant, associated function, or constant not found in `RolandError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Communication` found for enum `RolandError` in the current scope
[INFO] [stdout]   --> examples/telnet_client.rs:59:39
[INFO] [stdout]    |
[INFO] [stdout] 59 |             .map_err(|e| RolandError::Communication(format!("Failed to send command: {}", e)))?;
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^ variant, associated function, or constant not found in `RolandError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Communication` found for enum `RolandError` in the current scope
[INFO] [stdout]   --> examples/telnet_client.rs:61:39
[INFO] [stdout]    |
[INFO] [stdout] 61 |             .map_err(|e| RolandError::Communication(format!("Failed to flush: {}", e)))?;
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^ variant, associated function, or constant not found in `RolandError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Communication` found for enum `RolandError` in the current scope
[INFO] [stdout]   --> examples/telnet_client.rs:73:39
[INFO] [stdout]    |
[INFO] [stdout] 73 |             .map_err(|e| RolandError::Communication(format!("Failed to read response: {}", e)))?;
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^ variant, associated function, or constant not found in `RolandError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant, associated function, or constant named `Communication` found for enum `RolandError` in the current scope
[INFO] [stdout]   --> examples/telnet_client.rs:76:37
[INFO] [stdout]    |
[INFO] [stdout] 76 |             return Err(RolandError::Communication("Connection closed".to_string()));
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^ variant, associated function, or constant not found in `RolandError`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error: `RolandError: std::error::Error` is not satisfied
[INFO] [stdout]    --> examples/telnet_client.rs:173:55
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn main() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]     |              -------------------------------------- required `RolandError: std::error::Error` because of this
[INFO] [stdout] ...
[INFO] [stdout] 173 |     let mut client = TelnetClient::connect(host, port)?;
[INFO] [stdout]     |                      ---------------------------------^ the trait `std::error::Error` is not implemented for `RolandError`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this has type `Result<_, RolandError>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout]     = note: required for `Box<dyn std::error::Error>` to implement `From<RolandError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `roland-rs` (example "telnet_client") due to 8 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "12a5fdb62a7e33d000047810a5918c1ebff3674df4d57c550d6dd03ccc8d12d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12a5fdb62a7e33d000047810a5918c1ebff3674df4d57c550d6dd03ccc8d12d5", kill_on_drop: false }`
[INFO] [stdout] 12a5fdb62a7e33d000047810a5918c1ebff3674df4d57c550d6dd03ccc8d12d5
