[INFO] cloning repository https://github.com/dvshapkin/fs-helper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dvshapkin/fs-helper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdvshapkin%2Ffs-helper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdvshapkin%2Ffs-helper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80151a40e7e8b6723766e32e451654a4534f2fbb
[INFO] checking dvshapkin/fs-helper against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdvshapkin%2Ffs-helper" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dvshapkin/fs-helper on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dvshapkin/fs-helper
[INFO] finished tweaking git repo https://github.com/dvshapkin/fs-helper
[INFO] tweaked toml for git repo https://github.com/dvshapkin/fs-helper written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dvshapkin/fs-helper 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 95ff23b19d7e0b4d81e4ed41e23ab65c23deef2c8f6ec81deaa023df9a973442
[INFO] running `Command { std: "docker" "start" "-a" "95ff23b19d7e0b4d81e4ed41e23ab65c23deef2c8f6ec81deaa023df9a973442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95ff23b19d7e0b4d81e4ed41e23ab65c23deef2c8f6ec81deaa023df9a973442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95ff23b19d7e0b4d81e4ed41e23ab65c23deef2c8f6ec81deaa023df9a973442", kill_on_drop: false }`
[INFO] [stdout] 95ff23b19d7e0b4d81e4ed41e23ab65c23deef2c8f6ec81deaa023df9a973442
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7cfaae9bfc75e9bced0fad04a6bffe6f1045973e058e76682737fdbd951c73b
[INFO] running `Command { std: "docker" "start" "-a" "a7cfaae9bfc75e9bced0fad04a6bffe6f1045973e058e76682737fdbd951c73b", kill_on_drop: false }`
[INFO] [stderr]     Checking fs-helper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `kind` and `cause` are never read
[INFO] [stdout]   --> src/result.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Error {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 14 |     kind: ErrorKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     cause: Box<dyn std::error::Error>
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `cause` are never read
[INFO] [stdout]   --> src/result.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Error {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 14 |     kind: ErrorKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     cause: Box<dyn std::error::Error>
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "a7cfaae9bfc75e9bced0fad04a6bffe6f1045973e058e76682737fdbd951c73b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7cfaae9bfc75e9bced0fad04a6bffe6f1045973e058e76682737fdbd951c73b", kill_on_drop: false }`
[INFO] [stdout] a7cfaae9bfc75e9bced0fad04a6bffe6f1045973e058e76682737fdbd951c73b