[INFO] cloning repository https://github.com/ghaworth/ferrous-selfcheck
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ghaworth/ferrous-selfcheck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fghaworth%2Fferrous-selfcheck", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fghaworth%2Fferrous-selfcheck'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5f7f84cb95d0bd1b054cad6166383fdc0fee52b2
[INFO] testing ghaworth/ferrous-selfcheck against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fghaworth%2Fferrous-selfcheck" "/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/ghaworth/ferrous-selfcheck
[INFO] finished tweaking git repo https://github.com/ghaworth/ferrous-selfcheck
[INFO] tweaked toml for git repo https://github.com/ghaworth/ferrous-selfcheck written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ghaworth/ferrous-selfcheck on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ghaworth/ferrous-selfcheck 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" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987
[INFO] running `Command { std: "docker" "start" "bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987", 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" "bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987", 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=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling protocol v0.1.0 (/opt/rustwide/workdir/protocol)
[INFO] [stdout] warning: unused imports: `collections::VecDeque` and `str::FromStr`
[INFO] [stdout]  --> protocol/src/lib.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::VecDeque, str::FromStr};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling server v0.1.0 (/opt/rustwide/workdir/server)
[INFO] [stdout] error[E0277]: `ParseError` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> server/src/main.rs:41:44
[INFO] [stdout]    |
[INFO] [stdout] 41 |                 writeln!(stream, "ERR {}", e)?;
[INFO] [stdout]    |                                       --   ^ `ParseError` cannot be formatted with the default formatter
[INFO] [stdout]    |                                       |
[INFO] [stdout]    |                                       required by this formatting parameter
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::fmt::Display` is not implemented for `ParseError`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or `{:#?}` for pretty-print) instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `server` (bin "server") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987", kill_on_drop: false }`
[INFO] [stdout] bece046d50cf207a07b13b64cb22d1f5ad591261bdb11ec498347258ab309987
