[INFO] fetching crate mbot_proc_macro_helpers 0.0.1...
[INFO] checking mbot_proc_macro_helpers-0.0.1 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate mbot_proc_macro_helpers 0.0.1 into /workspace/builds/worker-53/source
[INFO] validating manifest of crates.io crate mbot_proc_macro_helpers 0.0.1 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mbot_proc_macro_helpers 0.0.1
[INFO] finished tweaking crates.io crate mbot_proc_macro_helpers 0.0.1
[INFO] tweaked toml for crates.io crate mbot_proc_macro_helpers 0.0.1 written to /workspace/builds/worker-53/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded derive-syn-parse v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 568db5083cfc0a44bf9268de59174f66c5deef5dd90dddf9fea04bbe50ed9d16
[INFO] running `Command { std: "docker" "start" "-a" "568db5083cfc0a44bf9268de59174f66c5deef5dd90dddf9fea04bbe50ed9d16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "568db5083cfc0a44bf9268de59174f66c5deef5dd90dddf9fea04bbe50ed9d16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "568db5083cfc0a44bf9268de59174f66c5deef5dd90dddf9fea04bbe50ed9d16", kill_on_drop: false }`
[INFO] [stdout] 568db5083cfc0a44bf9268de59174f66c5deef5dd90dddf9fea04bbe50ed9d16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1c9b63e51cac175317509dd181ce1e1e141d7907efaad3d4f4eb9d60d22a32c
[INFO] running `Command { std: "docker" "start" "-a" "c1c9b63e51cac175317509dd181ce1e1e141d7907efaad3d4f4eb9d60d22a32c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling derive-syn-parse v0.1.5
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]     Checking mbot_proc_macro_helpers v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `colon_token`
[INFO] [stdout]  --> src/mice.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     colon_token: Token![:],
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `trailing_comma`
[INFO] [stdout]  --> src/mice.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     trailing_comma: Option<Token![,]>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `unary_ident`
[INFO] [stdout]   --> src/mice.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     unary_ident: Option<Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `binary_ident`
[INFO] [stdout]   --> src/mice.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     binary_ident: Option<Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace_token`
[INFO] [stdout]   --> src/mice.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     brace_token: Brace,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `kind_token`
[INFO] [stdout]   --> src/mice.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     kind_token: Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `arrow_token`
[INFO] [stdout]   --> src/mice.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     arrow_token: Token![=>],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `arg_paren`
[INFO] [stdout]   --> src/mice.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     arg_paren: Paren,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `semicolon_token`
[INFO] [stdout]   --> src/mice.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     semicolon_token: Token![;],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sum_equal_token`
[INFO] [stdout]   --> src/mice.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     sum_equal_token: Token![=],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace_token`
[INFO] [stdout]   --> src/mice.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     brace_token: Brace,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `colon_token`
[INFO] [stdout]  --> src/mice.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     colon_token: Token![:],
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `trailing_comma`
[INFO] [stdout]  --> src/mice.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     trailing_comma: Option<Token![,]>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `unary_ident`
[INFO] [stdout]   --> src/mice.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     unary_ident: Option<Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `binary_ident`
[INFO] [stdout]   --> src/mice.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     binary_ident: Option<Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace_token`
[INFO] [stdout]   --> src/mice.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     brace_token: Brace,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `kind_token`
[INFO] [stdout]   --> src/mice.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     kind_token: Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `arrow_token`
[INFO] [stdout]   --> src/mice.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     arrow_token: Token![=>],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `arg_paren`
[INFO] [stdout]   --> src/mice.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     arg_paren: Paren,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `semicolon_token`
[INFO] [stdout]   --> src/mice.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     semicolon_token: Token![;],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sum_equal_token`
[INFO] [stdout]   --> src/mice.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     sum_equal_token: Token![=],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `brace_token`
[INFO] [stdout]   --> src/mice.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     brace_token: Brace,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.78s
[INFO] running `Command { std: "docker" "inspect" "c1c9b63e51cac175317509dd181ce1e1e141d7907efaad3d4f4eb9d60d22a32c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1c9b63e51cac175317509dd181ce1e1e141d7907efaad3d4f4eb9d60d22a32c", kill_on_drop: false }`
[INFO] [stdout] c1c9b63e51cac175317509dd181ce1e1e141d7907efaad3d4f4eb9d60d22a32c