[INFO] fetching crate flags_derive 0.1.0...
[INFO] checking flags_derive-0.1.0 against 52995a223f2919dd3e2e427231db90a257350ded for pr-129249-4
[INFO] extracting crate flags_derive 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate flags_derive 0.1.0
[INFO] finished tweaking crates.io crate flags_derive 0.1.0
[INFO] tweaked toml for crates.io crate flags_derive 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate flags_derive 0.1.0 on toolchain 52995a223f2919dd3e2e427231db90a257350ded
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate flags_derive 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" "+52995a223f2919dd3e2e427231db90a257350ded" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:c0af3998e971868164375a7dfb646c9933ddd1a3bdb00fa2041266763dc1eeab" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef
[INFO] running `Command { std: "docker" "start" "80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef", 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" "80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef", 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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]     Checking equivalent v1.0.2
[INFO] [stderr]     Checking hashbrown v0.15.2
[INFO] [stderr]     Checking toml_datetime v0.6.8
[INFO] [stderr]     Checking winnow v0.7.6
[INFO] [stderr]     Checking strsim v0.11.1
[INFO] [stderr]     Checking indexmap v2.9.0
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.100
[INFO] [stderr]     Checking toml_edit v0.22.24
[INFO] [stderr]     Checking darling_core v0.20.11
[INFO] [stderr]     Checking proc-macro-crate v3.3.0
[INFO] [stderr]    Compiling darling_macro v0.20.11
[INFO] [stderr]     Checking darling v0.20.11
[INFO] [stderr]     Checking flags_derive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: useless conversion to the same type: `syn::Error`
[INFO] [stdout]    --> src/lib.rs:138:38
[INFO] [stdout]     |
[INFO] [stdout] 138 |                 Err(e) => return Err(e.into()),
[INFO] [stdout]     |                                      ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 138 -                 Err(e) => return Err(e.into()),
[INFO] [stdout] 138 +                 Err(e) => return Err(e),
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 138 -                 Err(e) => return Err(e.into()),
[INFO] [stdout] 138 +                 Err(e) => return Err(<syn::Error as Into<_>>::into(e)),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flags_derive` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: useless conversion to the same type: `syn::Error`
[INFO] [stdout]    --> src/lib.rs:138:38
[INFO] [stdout]     |
[INFO] [stdout] 138 |                 Err(e) => return Err(e.into()),
[INFO] [stdout]     |                                      ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 138 -                 Err(e) => return Err(e.into()),
[INFO] [stdout] 138 +                 Err(e) => return Err(e),
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 138 -                 Err(e) => return Err(e.into()),
[INFO] [stdout] 138 +                 Err(e) => return Err(<syn::Error as Into<_>>::into(e)),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flags_derive` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef", kill_on_drop: false }`
[INFO] [stdout] 80fdaf7db76ec9bf7e0f04a8420079ef29fa2d7d4a61a8642db6c0a865e4f5ef
