[INFO] fetching crate sample-config-macros 0.2.0...
[INFO] checking sample-config-macros-0.2.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate sample-config-macros 0.2.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate sample-config-macros 0.2.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sample-config-macros 0.2.0
[INFO] finished tweaking crates.io crate sample-config-macros 0.2.0
[INFO] tweaked toml for crates.io crate sample-config-macros 0.2.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 55371b1f5ecfac733fd7dbde58f865b8da22612a5f349e433cc41e2085e9b61f
[INFO] running `Command { std: "docker" "start" "-a" "55371b1f5ecfac733fd7dbde58f865b8da22612a5f349e433cc41e2085e9b61f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55371b1f5ecfac733fd7dbde58f865b8da22612a5f349e433cc41e2085e9b61f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55371b1f5ecfac733fd7dbde58f865b8da22612a5f349e433cc41e2085e9b61f", kill_on_drop: false }`
[INFO] [stdout] 55371b1f5ecfac733fd7dbde58f865b8da22612a5f349e433cc41e2085e9b61f
[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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5618d90e9eed78fcfb7d8fa9763786bb0c5e9618afc1646ddf5ae6527279cbe8
[INFO] running `Command { std: "docker" "start" "-a" "5618d90e9eed78fcfb7d8fa9763786bb0c5e9618afc1646ddf5ae6527279cbe8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking sample-config-macros v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `yaml_fields`
[INFO] [stdout]    --> src/derive.rs:114:6
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let yaml_fields = fields.iter().map(FieldData::to_yaml_generator);
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_yaml_fields`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `json_fields`
[INFO] [stdout]    --> src/derive.rs:115:6
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let json_fields = fields.iter().map(FieldData::to_json_generator);
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_json_fields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant_idents`
[INFO] [stdout]    --> src/derive.rs:160:6
[INFO] [stdout]     |
[INFO] [stdout] 160 |     let variant_idents = data.variants.iter().map(|variant| &variant.ident).collect::<Vec<_>>();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variant_idents`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant_strings`
[INFO] [stdout]    --> src/derive.rs:161:6
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let variant_strings =
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variant_strings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `yaml_fields`
[INFO] [stdout]    --> src/derive.rs:114:6
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let yaml_fields = fields.iter().map(FieldData::to_yaml_generator);
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_yaml_fields`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `json_fields`
[INFO] [stdout]    --> src/derive.rs:115:6
[INFO] [stdout]     |
[INFO] [stdout] 115 |     let json_fields = fields.iter().map(FieldData::to_json_generator);
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_json_fields`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant_idents`
[INFO] [stdout]    --> src/derive.rs:160:6
[INFO] [stdout]     |
[INFO] [stdout] 160 |     let variant_idents = data.variants.iter().map(|variant| &variant.ident).collect::<Vec<_>>();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variant_idents`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `variant_strings`
[INFO] [stdout]    --> src/derive.rs:161:6
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let variant_strings =
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_variant_strings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.11s
[INFO] running `Command { std: "docker" "inspect" "5618d90e9eed78fcfb7d8fa9763786bb0c5e9618afc1646ddf5ae6527279cbe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5618d90e9eed78fcfb7d8fa9763786bb0c5e9618afc1646ddf5ae6527279cbe8", kill_on_drop: false }`
[INFO] [stdout] 5618d90e9eed78fcfb7d8fa9763786bb0c5e9618afc1646ddf5ae6527279cbe8