[INFO] cloning repository https://github.com/ziord/violet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ziord/violet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fziord%2Fviolet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fziord%2Fviolet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c65b5295259c983e874651090c5bbcbe703f8cb7
[INFO] checking ziord/violet against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fziord%2Fviolet" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ziord/violet 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/ziord/violet
[INFO] finished tweaking git repo https://github.com/ziord/violet
[INFO] tweaked toml for git repo https://github.com/ziord/violet written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ziord/violet 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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 36398222beb8a12d3add3b83ab21ba24f805f89084cc766617d33aecd2f095d1
[INFO] running `Command { std: "docker" "start" "-a" "36398222beb8a12d3add3b83ab21ba24f805f89084cc766617d33aecd2f095d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36398222beb8a12d3add3b83ab21ba24f805f89084cc766617d33aecd2f095d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36398222beb8a12d3add3b83ab21ba24f805f89084cc766617d33aecd2f095d1", kill_on_drop: false }`
[INFO] [stdout] 36398222beb8a12d3add3b83ab21ba24f805f89084cc766617d33aecd2f095d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 39cc706cc218eb079c8a3aed514ae2653a2f0749daae672ad9a37ba0b4e671f7
[INFO] running `Command { std: "docker" "start" "-a" "39cc706cc218eb079c8a3aed514ae2653a2f0749daae672ad9a37ba0b4e671f7", kill_on_drop: false }`
[INFO] [stderr]     Checking violet v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `error_code` is never read
[INFO] [stdout]   --> src/errors.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ErrorInfo<'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 22 |   pub error_code: ViError,
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorInfo` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/compiler.rs:464:16
[INFO] [stdout]     |
[INFO] [stdout] 464 |         .as_ref()
[INFO] [stdout]     |  ________________^
[INFO] [stdout] 465 | |       .borrow()
[INFO] [stdout]     | |_______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Option<&RefCell<Rc<Type>>>` does not implement `Borrow`, so calling `borrow` on `&Option<&RefCell<Rc<Type>>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 464 -       .as_ref()
[INFO] [stdout] 465 -       .borrow()
[INFO] [stdout] 464 +       .as_ref()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `error_code` is never read
[INFO] [stdout]   --> src/errors.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ErrorInfo<'a> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 22 |   pub error_code: ViError,
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrorInfo` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/compiler.rs:464:16
[INFO] [stdout]     |
[INFO] [stdout] 464 |         .as_ref()
[INFO] [stdout]     |  ________________^
[INFO] [stdout] 465 | |       .borrow()
[INFO] [stdout]     | |_______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Option<&RefCell<Rc<Type>>>` does not implement `Borrow`, so calling `borrow` on `&Option<&RefCell<Rc<Type>>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 464 -       .as_ref()
[INFO] [stdout] 465 -       .borrow()
[INFO] [stdout] 464 +       .as_ref()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "39cc706cc218eb079c8a3aed514ae2653a2f0749daae672ad9a37ba0b4e671f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39cc706cc218eb079c8a3aed514ae2653a2f0749daae672ad9a37ba0b4e671f7", kill_on_drop: false }`
[INFO] [stdout] 39cc706cc218eb079c8a3aed514ae2653a2f0749daae672ad9a37ba0b4e671f7