[INFO] fetching crate darling 0.13.0...
[INFO] testing darling-0.13.0 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate darling 0.13.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate darling 0.13.0 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate darling 0.13.0
[INFO] finished tweaking crates.io crate darling 0.13.0
[INFO] tweaked toml for crates.io crate darling 0.13.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate darling 0.13.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df1bac1a2c56032c454162acc10fa199cc8bd6955fe0245a931b5488a55cfdd0
[INFO] running `Command { std: "docker" "start" "-a" "df1bac1a2c56032c454162acc10fa199cc8bd6955fe0245a931b5488a55cfdd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df1bac1a2c56032c454162acc10fa199cc8bd6955fe0245a931b5488a55cfdd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df1bac1a2c56032c454162acc10fa199cc8bd6955fe0245a931b5488a55cfdd0", kill_on_drop: false }`
[INFO] [stdout] df1bac1a2c56032c454162acc10fa199cc8bd6955fe0245a931b5488a55cfdd0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f20edae5e9996b5e973c3ba76568f9a4bfab6ce05ec39c96ce4af1bdba1f26a2
[INFO] running `Command { std: "docker" "start" "-a" "f20edae5e9996b5e973c3ba76568f9a4bfab6ce05ec39c96ce4af1bdba1f26a2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling darling v0.13.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.64s
[INFO] running `Command { std: "docker" "inspect" "f20edae5e9996b5e973c3ba76568f9a4bfab6ce05ec39c96ce4af1bdba1f26a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f20edae5e9996b5e973c3ba76568f9a4bfab6ce05ec39c96ce4af1bdba1f26a2", kill_on_drop: false }`
[INFO] [stdout] f20edae5e9996b5e973c3ba76568f9a4bfab6ce05ec39c96ce4af1bdba1f26a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80484e0216d43a0a87e9e6633071111f05c64d6267c938758f60b1c328a93336
[INFO] running `Command { std: "docker" "start" "-a" "80484e0216d43a0a87e9e6633071111f05c64d6267c938758f60b1c328a93336", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling darling v0.13.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]  --> tests/supports.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     data: ast::Data<Variant, ()>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> tests/supports.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     data: ast::Data<(), syn::Field>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `lorem`
[INFO] [stdout]   --> tests/custom_bound.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     lorem: Wrapper<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ident`
[INFO] [stdout]   --> tests/from_generics.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub ident: syn::Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sit`
[INFO] [stdout]  --> tests/error.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     sit: bool,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `world`
[INFO] [stdout]   --> tests/error.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     world: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ident`
[INFO] [stdout]   --> tests/error.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     ident: syn::Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ipsum`
[INFO] [stdout]  --> tests/suggestions.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     ipsum: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dolor`
[INFO] [stdout]   --> tests/suggestions.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     dolor: Dolor,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sit`
[INFO] [stdout]   --> tests/suggestions.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     sit: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ident`
[INFO] [stdout]  --> examples/supports_struct.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     ident: Option<Ident>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ty`
[INFO] [stdout]  --> examples/supports_struct.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     ty: Type,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `skip`
[INFO] [stdout]   --> examples/supports_struct.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     skip: bool,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ident`
[INFO] [stdout]   --> examples/supports_struct.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     ident: Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> examples/supports_struct.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     data: ast::Data<util::Ignored, LoremField>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `lorem`
[INFO] [stdout]   --> tests/generics.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     lorem: Wrapper<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `user`
[INFO] [stdout]  --> tests/enums_struct.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Hello { user: String, silent: bool },
[INFO] [stdout]   |             ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `silent`
[INFO] [stdout]  --> tests/enums_struct.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Hello { user: String, silent: bool },
[INFO] [stdout]   |                           ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `user`
[INFO] [stdout]  --> tests/enums_struct.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Goodbye { user: String },
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ty`
[INFO] [stdout]    --> examples/consume_fields.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |     ty: syn::Type,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ipsum`
[INFO] [stdout]   --> tests/accrue_errors.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     ipsum: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dolor`
[INFO] [stdout]   --> tests/accrue_errors.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     dolor: Dolor,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> tests/accrue_errors.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     data: ast::Data<(), LoremField>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sit`
[INFO] [stdout]   --> tests/accrue_errors.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     sit: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ident`
[INFO] [stdout]   --> tests/accrue_errors.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     ident: Option<syn::Ident>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `aliased_as`
[INFO] [stdout]   --> tests/accrue_errors.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     aliased_as: syn::Ident,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `morning`
[INFO] [stdout]   --> tests/accrue_errors.rs:60:15
[INFO] [stdout]    |
[INFO] [stdout] 60 |     Tuesday { morning: bool, afternoon: String },
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `afternoon`
[INFO] [stdout]   --> tests/accrue_errors.rs:60:30
[INFO] [stdout]    |
[INFO] [stdout] 60 |     Tuesday { morning: bool, afternoon: String },
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `schedule`
[INFO] [stdout]   --> tests/accrue_errors.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     schedule: Week,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `darling`; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name consume_fields --edition=2018 examples/consume_fields.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="suggestions"' -C metadata=75211deecd37b1cb -C extra-filename=-75211deecd37b1cb --out-dir /opt/rustwide/target/debug/examples -L dependency=/opt/rustwide/target/debug/deps --extern darling=/opt/rustwide/target/debug/deps/libdarling-e120f3462bcf589d.rlib --extern darling_core=/opt/rustwide/target/debug/deps/libdarling_core-8ff349caf81da0a7.rlib --extern darling_macro=/opt/rustwide/target/debug/deps/libdarling_macro-31f539ed0cea433a.so --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-1ca73c2ae68d1778.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-46229b02aba27186.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-ca1aafcd2d52febb.rlib --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "80484e0216d43a0a87e9e6633071111f05c64d6267c938758f60b1c328a93336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80484e0216d43a0a87e9e6633071111f05c64d6267c938758f60b1c328a93336", kill_on_drop: false }`
[INFO] [stdout] 80484e0216d43a0a87e9e6633071111f05c64d6267c938758f60b1c328a93336