[INFO] fetching crate rubber_duck_macro 0.2.0...
[INFO] checking rubber_duck_macro-0.2.0 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate rubber_duck_macro 0.2.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate rubber_duck_macro 0.2.0 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rubber_duck_macro 0.2.0
[INFO] finished tweaking crates.io crate rubber_duck_macro 0.2.0
[INFO] tweaked toml for crates.io crate rubber_duck_macro 0.2.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efcf756a4394c63516add3616a5ef5f862d876866868df09934de87977d20463
[INFO] running `Command { std: "docker" "start" "-a" "efcf756a4394c63516add3616a5ef5f862d876866868df09934de87977d20463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efcf756a4394c63516add3616a5ef5f862d876866868df09934de87977d20463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efcf756a4394c63516add3616a5ef5f862d876866868df09934de87977d20463", kill_on_drop: false }`
[INFO] [stdout] efcf756a4394c63516add3616a5ef5f862d876866868df09934de87977d20463
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 82c14fbea3493c9175af9823405ce338c97011eb29f95b6e7e4a3c8a0ad6c276
[INFO] running `Command { std: "docker" "start" "-a" "82c14fbea3493c9175af9823405ce338c97011eb29f95b6e7e4a3c8a0ad6c276", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking rubber_duck_macro v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `quote_spanned`
[INFO] [stdout]  --> src/call.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use quote::{quote, quote_spanned};
[INFO] [stdout]   |                    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `syn::spanned::Spanned`
[INFO] [stdout]  --> src/call.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::spanned::Spanned;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ExprMethodCall`, `Type`
[INFO] [stdout]  --> src/call.rs:4:50
[INFO] [stdout]   |
[INFO] [stdout] 4 | use syn::{parse_macro_input, Expr, Ident, Token, Type, ExprMethodCall};
[INFO] [stdout]   |                                                  ^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `bracketed`, `parenthesized`
[INFO] [stdout]  --> src/call.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | use syn::{braced, bracketed, parenthesized, parse_quote};
[INFO] [stdout]   |                   ^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `syn::ExprCall`
[INFO] [stdout]   --> src/call.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use syn::ExprCall;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `syn::export::ToTokens`
[INFO] [stdout]  --> src/builder.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::export::ToTokens;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Expr`, `Field`, `Fields`, `Item`, `Lit`, `MetaNameValue`, `Meta`
[INFO] [stdout]  --> src/builder.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Expr, Field, Fields, GenericArgument, Ident, Item, Lit, Meta, MetaNameValue,
[INFO] [stdout]   |     ^^^^  ^^^^^  ^^^^^^                          ^^^^  ^^^  ^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::parse_fn::FieldRole`
[INFO] [stdout]   --> src/builder.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::parse_fn::FieldRole;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::parse_fn::FieldRole`
[INFO] [stdout]  --> src/build.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::parse_fn::FieldRole;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `quote::quote`
[INFO] [stdout]  --> src/parse_fn.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use quote::quote;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `quote_spanned`
[INFO] [stdout]  --> src/call.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use quote::{quote, quote_spanned};
[INFO] [stdout]   |                    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `syn::spanned::Spanned`
[INFO] [stdout]  --> src/call.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::spanned::Spanned;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ExprMethodCall`, `Type`
[INFO] [stdout]  --> src/call.rs:4:50
[INFO] [stdout]   |
[INFO] [stdout] 4 | use syn::{parse_macro_input, Expr, Ident, Token, Type, ExprMethodCall};
[INFO] [stdout]   |                                                  ^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `bracketed`, `parenthesized`
[INFO] [stdout]  --> src/call.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | use syn::{braced, bracketed, parenthesized, parse_quote};
[INFO] [stdout]   |                   ^^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `syn::ExprCall`
[INFO] [stdout]   --> src/call.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use syn::ExprCall;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `syn::export::ToTokens`
[INFO] [stdout]  --> src/builder.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::export::ToTokens;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Expr`, `Field`, `Fields`, `Item`, `Lit`, `MetaNameValue`, `Meta`
[INFO] [stdout]  --> src/builder.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Expr, Field, Fields, GenericArgument, Ident, Item, Lit, Meta, MetaNameValue,
[INFO] [stdout]   |     ^^^^  ^^^^^  ^^^^^^                          ^^^^  ^^^  ^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::parse_fn::FieldRole`
[INFO] [stdout]   --> src/builder.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::parse_fn::FieldRole;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::parse_fn::FieldRole`
[INFO] [stdout]  --> src/build.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::parse_fn::FieldRole;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `quote::quote`
[INFO] [stdout]  --> src/parse_fn.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use quote::quote;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/call.rs:78:57
[INFO] [stdout]    |
[INFO] [stdout] 78 |                     brace.surround(&mut braced_tokens, |v|{});
[INFO] [stdout]    |                                                         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/build.rs:28:72
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let p_expr_expanders = structure.positional().enumerate().map(|(i, p)| {
[INFO] [stdout]    |                                                                        ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/call.rs:78:57
[INFO] [stdout]    |
[INFO] [stdout] 78 |                     brace.surround(&mut braced_tokens, |v|{});
[INFO] [stdout]    |                                                         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/build.rs:28:72
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let p_expr_expanders = structure.positional().enumerate().map(|(i, p)| {
[INFO] [stdout]    |                                                                        ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ExpressionList`
[INFO] [stdout]   --> src/call.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct ExpressionList {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_builder`
[INFO] [stdout]  --> src/build.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn gen_builder(structure: &parse_fn::Structure) -> ::proc_macro2::TokenStream {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ExpressionList`
[INFO] [stdout]   --> src/call.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct ExpressionList {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_builder`
[INFO] [stdout]  --> src/build.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn gen_builder(structure: &parse_fn::Structure) -> ::proc_macro2::TokenStream {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.71s
[INFO] running `Command { std: "docker" "inspect" "82c14fbea3493c9175af9823405ce338c97011eb29f95b6e7e4a3c8a0ad6c276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82c14fbea3493c9175af9823405ce338c97011eb29f95b6e7e4a3c8a0ad6c276", kill_on_drop: false }`
[INFO] [stdout] 82c14fbea3493c9175af9823405ce338c97011eb29f95b6e7e4a3c8a0ad6c276