[INFO] fetching crate darling 0.13.0...
[INFO] checking darling-0.13.0 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate darling 0.13.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate darling 0.13.0 on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-15/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e73ea52e4e0d85d5164c59e9efa1f8824da125436f131a556f7865fa455554ec
[INFO] running `Command { std: "docker" "start" "-a" "e73ea52e4e0d85d5164c59e9efa1f8824da125436f131a556f7865fa455554ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e73ea52e4e0d85d5164c59e9efa1f8824da125436f131a556f7865fa455554ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e73ea52e4e0d85d5164c59e9efa1f8824da125436f131a556f7865fa455554ec", kill_on_drop: false }`
[INFO] [stdout] e73ea52e4e0d85d5164c59e9efa1f8824da125436f131a556f7865fa455554ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0930a5a918f2d4870b006ad95c5bb47561ac29c96b4019521bb07ba04bf14d32
[INFO] running `Command { std: "docker" "start" "-a" "0930a5a918f2d4870b006ad95c5bb47561ac29c96b4019521bb07ba04bf14d32", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   darling_core v0.13.0 (as host dependency): strsim, suggestions
[INFO] [stderr] 
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]     Checking unicode-xid v0.2.0
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking darling_core v0.13.0
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]     Checking darling v0.13.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/split_declaration.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/supports_struct.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/custom_bound.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/enums_unit.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/enums_struct.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/suggestions.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/skip.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/from_type_param_default.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/from_variant.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/hash_map.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/accrue_errors.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/unsupported_attributes.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/computed_bound.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/from_generics.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/consume_fields.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/multiple.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/automatic_bounds.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/newtype.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/fallible_read.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/enums_newtype.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/supports.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/defaults.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/from_type_param.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/happy_path.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/error.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/generics.rs from 2018 edition to 2021
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.17s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]     Checking darling v0.13.0 (/tmp/fixit)
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.97s
[INFO] running `Command { std: "docker" "inspect" "0930a5a918f2d4870b006ad95c5bb47561ac29c96b4019521bb07ba04bf14d32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0930a5a918f2d4870b006ad95c5bb47561ac29c96b4019521bb07ba04bf14d32", kill_on_drop: false }`
[INFO] [stdout] 0930a5a918f2d4870b006ad95c5bb47561ac29c96b4019521bb07ba04bf14d32