[INFO] cloning repository https://github.com/coravacav/kolya-letter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/coravacav/kolya-letter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoravacav%2Fkolya-letter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoravacav%2Fkolya-letter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed0ebd4f0814a4626ed6607e760a2ce5475643ad
[INFO] checking coravacav/kolya-letter against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoravacav%2Fkolya-letter" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/coravacav/kolya-letter
[INFO] finished tweaking git repo https://github.com/coravacav/kolya-letter
[INFO] tweaked toml for git repo https://github.com/coravacav/kolya-letter written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/coravacav/kolya-letter on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/coravacav/kolya-letter 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cd730507aa908aa17572dc49adadbed08a7371b1e5d32ffd93e22abf680c5ea
[INFO] running `Command { std: "docker" "start" "-a" "6cd730507aa908aa17572dc49adadbed08a7371b1e5d32ffd93e22abf680c5ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cd730507aa908aa17572dc49adadbed08a7371b1e5d32ffd93e22abf680c5ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cd730507aa908aa17572dc49adadbed08a7371b1e5d32ffd93e22abf680c5ea", kill_on_drop: false }`
[INFO] [stdout] 6cd730507aa908aa17572dc49adadbed08a7371b1e5d32ffd93e22abf680c5ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0def1d88459393d3d55a695a6b1fccce06d4611cc8ae23debcc5fe69f0ce2fa0
[INFO] running `Command { std: "docker" "start" "-a" "0def1d88459393d3d55a695a6b1fccce06d4611cc8ae23debcc5fe69f0ce2fa0", kill_on_drop: false }`
[INFO] [stderr]    Compiling fastnum v0.7.1
[INFO] [stderr]     Checking bnum v0.12.1
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling maud_macros v0.27.0
[INFO] [stderr]    Compiling derive_more-impl v2.0.1
[INFO] [stderr]     Checking maud v0.27.0
[INFO] [stderr]     Checking derive_more v2.0.1
[INFO] [stderr]     Checking kolya-letter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Letter` is never constructed
[INFO] [stdout]   --> src/lib.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Letter {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `CompressedLetter` is never constructed
[INFO] [stdout]    --> src/lib.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 | pub struct CompressedLetter(Letter);
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kolya-letter` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0def1d88459393d3d55a695a6b1fccce06d4611cc8ae23debcc5fe69f0ce2fa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0def1d88459393d3d55a695a6b1fccce06d4611cc8ae23debcc5fe69f0ce2fa0", kill_on_drop: false }`
[INFO] [stdout] 0def1d88459393d3d55a695a6b1fccce06d4611cc8ae23debcc5fe69f0ce2fa0
