[INFO] fetching crate alkahest-proc 0.3.0...
[INFO] checking alkahest-proc-0.3.0 against master#3139ff09e9d07f7700f8d15ed25a231e29c43627 for pr-121848-3
[INFO] extracting crate alkahest-proc 0.3.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate alkahest-proc 0.3.0 on toolchain 3139ff09e9d07f7700f8d15ed25a231e29c43627
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3139ff09e9d07f7700f8d15ed25a231e29c43627" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alkahest-proc 0.3.0
[INFO] finished tweaking crates.io crate alkahest-proc 0.3.0
[INFO] tweaked toml for crates.io crate alkahest-proc 0.3.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3139ff09e9d07f7700f8d15ed25a231e29c43627" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3139ff09e9d07f7700f8d15ed25a231e29c43627" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-easy v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+3139ff09e9d07f7700f8d15ed25a231e29c43627" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d36a546380429b0b6c62b3cba13cc531c39effe874c830b266d6edc23d5d1f3a
[INFO] running `Command { std: "docker" "start" "-a" "d36a546380429b0b6c62b3cba13cc531c39effe874c830b266d6edc23d5d1f3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d36a546380429b0b6c62b3cba13cc531c39effe874c830b266d6edc23d5d1f3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d36a546380429b0b6c62b3cba13cc531c39effe874c830b266d6edc23d5d1f3a", kill_on_drop: false }`
[INFO] [stdout] d36a546380429b0b6c62b3cba13cc531c39effe874c830b266d6edc23d5d1f3a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+3139ff09e9d07f7700f8d15ed25a231e29c43627" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b0821d5944406a8ff647bbecb12f08a384dc0a914099cb674d5a847bc8a98ef
[INFO] running `Command { std: "docker" "start" "-a" "7b0821d5944406a8ff647bbecb12f08a384dc0a914099cb674d5a847bc8a98ef", kill_on_drop: false }`
[INFO] [stderr]     Checking syn v2.0.75
[INFO] [stderr]     Checking proc-easy v0.3.0
[INFO] [stderr]     Checking alkahest-proc v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Formula(Formula),
[INFO] [stdout]    |         ------- ^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Formula(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:42:19
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Serialize(Serialize, proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |         --------- ^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Serialize((), proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |                   ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:43:22
[INFO] [stdout]    |
[INFO] [stdout] 43 |         SerializeRef(SerializeRef, proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |         ------------ ^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 43 |         SerializeRef((), proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |         Deserialize(Deserialize, proc_easy::EasyMaybe<DeserializeParams>),
[INFO] [stdout]    |         ----------- ^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 44 |         Deserialize((), proc_easy::EasyMaybe<DeserializeParams>),
[INFO] [stdout]    |                     ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Formula(Formula),
[INFO] [stdout]    |         ------- ^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Formula(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:42:19
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Serialize(Serialize, proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |         --------- ^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Serialize((), proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |                   ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:43:22
[INFO] [stdout]    |
[INFO] [stdout] 43 |         SerializeRef(SerializeRef, proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |         ------------ ^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 43 |         SerializeRef((), proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |         Deserialize(Deserialize, proc_easy::EasyMaybe<DeserializeParams>),
[INFO] [stdout]    |         ----------- ^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 44 |         Deserialize((), proc_easy::EasyMaybe<DeserializeParams>),
[INFO] [stdout]    |                     ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.89s
[INFO] running `Command { std: "docker" "inspect" "7b0821d5944406a8ff647bbecb12f08a384dc0a914099cb674d5a847bc8a98ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b0821d5944406a8ff647bbecb12f08a384dc0a914099cb674d5a847bc8a98ef", kill_on_drop: false }`
[INFO] [stdout] 7b0821d5944406a8ff647bbecb12f08a384dc0a914099cb674d5a847bc8a98ef
[INFO] checking alkahest-proc-0.3.0 against try#a2cff3b7a9661c90ec0d581d3f3a69bb97c11138 for pr-121848-3
[INFO] extracting crate alkahest-proc 0.3.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate alkahest-proc 0.3.0 on toolchain a2cff3b7a9661c90ec0d581d3f3a69bb97c11138
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2cff3b7a9661c90ec0d581d3f3a69bb97c11138" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alkahest-proc 0.3.0
[INFO] finished tweaking crates.io crate alkahest-proc 0.3.0
[INFO] tweaked toml for crates.io crate alkahest-proc 0.3.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2cff3b7a9661c90ec0d581d3f3a69bb97c11138" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2cff3b7a9661c90ec0d581d3f3a69bb97c11138" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+a2cff3b7a9661c90ec0d581d3f3a69bb97c11138" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e3d1f9d566212d5a66f727db5056fc4a19aafaa9c6d79a9ebcc715aa7afc2f2
[INFO] running `Command { std: "docker" "start" "-a" "3e3d1f9d566212d5a66f727db5056fc4a19aafaa9c6d79a9ebcc715aa7afc2f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e3d1f9d566212d5a66f727db5056fc4a19aafaa9c6d79a9ebcc715aa7afc2f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e3d1f9d566212d5a66f727db5056fc4a19aafaa9c6d79a9ebcc715aa7afc2f2", kill_on_drop: false }`
[INFO] [stdout] 3e3d1f9d566212d5a66f727db5056fc4a19aafaa9c6d79a9ebcc715aa7afc2f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+a2cff3b7a9661c90ec0d581d3f3a69bb97c11138" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2cd0e8ea45f6a03e0aa5aac64589d514591dd9baee6bd99f288382555672ad90
[INFO] running `Command { std: "docker" "start" "-a" "2cd0e8ea45f6a03e0aa5aac64589d514591dd9baee6bd99f288382555672ad90", kill_on_drop: false }`
[INFO] [stderr]     Checking syn v2.0.75
[INFO] [stderr]     Checking proc-easy v0.3.0
[INFO] [stderr]     Checking alkahest-proc v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Formula(Formula),
[INFO] [stdout]    |         ------- ^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Formula(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:42:19
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Serialize(Serialize, proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |         --------- ^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Serialize((), proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |                   ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:43:22
[INFO] [stdout]    |
[INFO] [stdout] 43 |         SerializeRef(SerializeRef, proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |         ------------ ^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 43 |         SerializeRef((), proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |         Deserialize(Deserialize, proc_easy::EasyMaybe<DeserializeParams>),
[INFO] [stdout]    |         ----------- ^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 44 |         Deserialize((), proc_easy::EasyMaybe<DeserializeParams>),
[INFO] [stdout]    |                     ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Formula(Formula),
[INFO] [stdout]    |         ------- ^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Formula(()),
[INFO] [stdout]    |                 ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:42:19
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Serialize(Serialize, proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |         --------- ^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Serialize((), proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |                   ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:43:22
[INFO] [stdout]    |
[INFO] [stdout] 43 |         SerializeRef(SerializeRef, proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |         ------------ ^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 43 |         SerializeRef((), proc_easy::EasyMaybe<SerializeParams>),
[INFO] [stdout]    |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/attrs.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |         Deserialize(Deserialize, proc_easy::EasyMaybe<DeserializeParams>),
[INFO] [stdout]    |         ----------- ^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 44 |         Deserialize((), proc_easy::EasyMaybe<DeserializeParams>),
[INFO] [stdout]    |                     ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.66s
[INFO] running `Command { std: "docker" "inspect" "2cd0e8ea45f6a03e0aa5aac64589d514591dd9baee6bd99f288382555672ad90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cd0e8ea45f6a03e0aa5aac64589d514591dd9baee6bd99f288382555672ad90", kill_on_drop: false }`
[INFO] [stdout] 2cd0e8ea45f6a03e0aa5aac64589d514591dd9baee6bd99f288382555672ad90
