[INFO] fetching crate delve 0.3.0...
[INFO] testing delve-0.3.0 against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] extracting crate delve 0.3.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate delve 0.3.0
[INFO] finished tweaking crates.io crate delve 0.3.0
[INFO] tweaked toml for crates.io crate delve 0.3.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate delve 0.3.0 on toolchain 2fd6efc32704647e64d3d646d21c4c68eae100e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 28 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded if_chain v1.0.3
[INFO] [stderr]   Downloaded deluxe-macros v0.1.0
[INFO] [stderr]   Downloaded deluxe-core v0.1.0
[INFO] [stderr]   Downloaded delve-derive v0.3.0
[INFO] [stderr]   Downloaded deluxe v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3bfb9e76058ddacb459bc655a7d3ecaa06243a021c0965c99679c0049467e8e
[INFO] running `Command { std: "docker" "start" "-a" "b3bfb9e76058ddacb459bc655a7d3ecaa06243a021c0965c99679c0049467e8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3bfb9e76058ddacb459bc655a7d3ecaa06243a021c0965c99679c0049467e8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3bfb9e76058ddacb459bc655a7d3ecaa06243a021c0965c99679c0049467e8e", kill_on_drop: false }`
[INFO] [stdout] b3bfb9e76058ddacb459bc655a7d3ecaa06243a021c0965c99679c0049467e8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cde7cb110fca01c6032696f9d6570c2c6523eb382da64bf159bd617cb455111e
[INFO] running `Command { std: "docker" "start" "-a" "cde7cb110fca01c6032696f9d6570c2c6523eb382da64bf159bd617cb455111e", kill_on_drop: false }`
[INFO] [stderr]    Compiling delve v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "cde7cb110fca01c6032696f9d6570c2c6523eb382da64bf159bd617cb455111e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cde7cb110fca01c6032696f9d6570c2c6523eb382da64bf159bd617cb455111e", kill_on_drop: false }`
[INFO] [stdout] cde7cb110fca01c6032696f9d6570c2c6523eb382da64bf159bd617cb455111e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba978ae083350df7b60465b498635a6358725d3e30a3579134d85cdffb837f13
[INFO] running `Command { std: "docker" "start" "-a" "ba978ae083350df7b60465b498635a6358725d3e30a3579134d85cdffb837f13", kill_on_drop: false }`
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling if_chain v1.0.3
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling indexmap v2.13.0
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]    Compiling deluxe-core v0.1.0
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling regex v1.12.2
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling deluxe-macros v0.1.0
[INFO] [stderr]    Compiling deluxe v0.1.0
[INFO] [stderr]    Compiling delve-derive v0.3.0
[INFO] [stderr]    Compiling delve v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 25.77s
[INFO] running `Command { std: "docker" "inspect" "ba978ae083350df7b60465b498635a6358725d3e30a3579134d85cdffb837f13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba978ae083350df7b60465b498635a6358725d3e30a3579134d85cdffb837f13", kill_on_drop: false }`
[INFO] [stdout] ba978ae083350df7b60465b498635a6358725d3e30a3579134d85cdffb837f13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6ac018e4bf6a09d7338d82600434408c53eb634271b265a67c3574e9cfe978ca
[INFO] running `Command { std: "docker" "start" "-a" "6ac018e4bf6a09d7338d82600434408c53eb634271b265a67c3574e9cfe978ca", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/delve-e32058e2f1f1d873)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/display.rs (/opt/rustwide/target/debug/deps/display-ab84bc10cece9382)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test ... ok
[INFO] [stdout] test test_attrs ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/from_str.rs (/opt/rustwide/target/debug/deps/from_str-6ade7c3d9c6efdd2)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_attrs ... ok
[INFO] [stdout] test test_plain ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/has_variant.rs (/opt/rustwide/target/debug/deps/has_variant-e144b59a7c947b51)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running tests/modify_variant.rs (/opt/rustwide/target/debug/deps/modify_variant-c69bd0176c21d886)
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_attrs ... ok
[INFO] [stdout] test test_resolve ... ok
[INFO] [stdout] test test_plain ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/to_str.rs (/opt/rustwide/target/debug/deps/to_str-c97e3fab0b99e94e)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_attrs ... ok
[INFO] [stdout] test test_plain ... ok
[INFO] [stdout] test test_skipped - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/variant_count.rs (/opt/rustwide/target/debug/deps/variant_count-daf92609e99c08d4)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/variant_fields.rs (/opt/rustwide/target/debug/deps/variant_fields-545a7379f7085a30)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_attrs ... ok
[INFO] [stdout] test test_plain ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/variant_names.rs (/opt/rustwide/target/debug/deps/variant_names-064d8b674c17cfc4)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_attrs ... ok
[INFO] [stdout] test test_plain ... ok
[INFO] [stderr]      Running tests/variant_tuples.rs (/opt/rustwide/target/debug/deps/variant_tuples-7bfdb4923a831e96)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests delve
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - ModifyField (line 244) ... FAILED
[INFO] [stdout] test src/lib.rs - FieldNames (line 178) ... FAILED
[INFO] [stdout] test src/lib.rs - HasVariant (line 156) ... FAILED
[INFO] [stdout] test src/lib.rs - TupleCount (line 202) ... FAILED
[INFO] [stdout] test src/lib.rs - ModifyField (line 221) ... FAILED
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - ModifyField (line 244) stdout ----
[INFO] [stdout] error: expected one of `,`, `=`, or `}`, found `Other`
[INFO] [stdout]    --> src/lib.rs:249:5
[INFO] [stdout]     |
[INFO] [stdout] 248 |     Day(#[delve(skip)] &'w String)
[INFO] [stdout]     |                                   -
[INFO] [stdout]     |                                   |
[INFO] [stdout]     |                                   expected one of `,`, `=`, or `}`
[INFO] [stdout]     |                                   help: missing `,`
[INFO] [stdout] 249 |     Other {
[INFO] [stdout]     |     ^^^^^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `EnumTuples` in this scope
[INFO] [stdout]    --> src/lib.rs:246:10
[INFO] [stdout]     |
[INFO] [stdout] 246 | #[derive(EnumTuples)]
[INFO] [stdout]     |          ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this derive macro
[INFO] [stdout]     |
[INFO] [stdout] 243 + use delve_derive::EnumTuples;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `delve` in this scope
[INFO] [stdout]    --> src/lib.rs:248:11
[INFO] [stdout]     |
[INFO] [stdout] 248 |     Day(#[delve(skip)] &'w String)
[INFO] [stdout]     |           ^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: `delve` is imported here, but it is a crate, not an attribute
[INFO] [stdout]    --> src/lib.rs:244:1
[INFO] [stdout]     |
[INFO] [stdout] 244 | extern crate r#delve;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `delve` in this scope
[INFO] [stdout]    --> src/lib.rs:250:11
[INFO] [stdout]     |
[INFO] [stdout] 250 |         #[delve(skip)]
[INFO] [stdout]     |           ^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: `delve` is imported here, but it is a crate, not an attribute
[INFO] [stdout]    --> src/lib.rs:244:1
[INFO] [stdout]     |
[INFO] [stdout] 244 | extern crate r#delve;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - FieldNames (line 178) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `delve::EnumFields`
[INFO] [stdout]    --> src/lib.rs:180:13
[INFO] [stdout]     |
[INFO] [stdout] 180 | use delve::{EnumFields, FieldNames};
[INFO] [stdout]     |             ^^^^^^^^^^ no `EnumFields` in the root
[INFO] [stdout]     |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]    --> src/lib.rs:55:23
[INFO] [stdout]     |
[INFO] [stdout]  54 | #[cfg(feature = "derive")]
[INFO] [stdout]     |       ------------------ the item is gated behind the `derive` feature
[INFO] [stdout]  55 | pub use delve_derive::EnumFields;
[INFO] [stdout]     |                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `field_names` found for enum `Color` in the current scope
[INFO] [stdout]    --> src/lib.rs:192:81
[INFO] [stdout]     |
[INFO] [stdout] 183 | enum Color {
[INFO] [stdout]     | ---------- method `field_names` not found for this enum
[INFO] [stdout] ...
[INFO] [stdout] 192 | assert_eq!(Some(&["r", "g", "b"][..]), Color::Custom { r: 255, g: 50, b: 100, }.field_names());
[INFO] [stdout]     |                                                                                 ^^^^^^^^^^^ method not found in `Color`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `field_names`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `FieldNames`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - HasVariant (line 156) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `delve::EnumHasVariant`
[INFO] [stdout]    --> src/lib.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 | use delve::{EnumHasVariant, HasVariant};
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             no `EnumHasVariant` in the root
[INFO] [stdout]     |             help: a similar name exists in the module: `HasVariant`
[INFO] [stdout]     |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]    --> src/lib.rs:110:23
[INFO] [stdout]     |
[INFO] [stdout] 109 | #[cfg(feature = "derive")]
[INFO] [stdout]     |       ------------------ the item is gated behind the `derive` feature
[INFO] [stdout] 110 | pub use delve_derive::EnumHasVariant;
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant or associated item named `has_variant` found for enum `Operators` in the current scope
[INFO] [stdout]    --> src/lib.rs:168:20
[INFO] [stdout]     |
[INFO] [stdout] 161 | enum Operators {
[INFO] [stdout]     | -------------- variant or associated item `has_variant` not found for this enum
[INFO] [stdout] ...
[INFO] [stdout] 168 | assert!(Operators::has_variant("Div"));
[INFO] [stdout]     |                    ^^^^^^^^^^^ variant or associated item not found in `Operators`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `has_variant`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `HasVariant`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - TupleCount (line 202) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `delve::EnumTuples`
[INFO] [stdout]    --> src/lib.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 | use delve::{EnumTuples, TupleCount};
[INFO] [stdout]     |             ^^^^^^^^^^ no `EnumTuples` in the root
[INFO] [stdout]     |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]    --> src/lib.rs:60:23
[INFO] [stdout]     |
[INFO] [stdout]  59 | #[cfg(feature = "derive")]
[INFO] [stdout]     |       ------------------ the item is gated behind the `derive` feature
[INFO] [stdout]  60 | pub use delve_derive::EnumTuples;
[INFO] [stdout]     |                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this enum variant takes 2 arguments but 1 argument was supplied
[INFO] [stdout]    --> src/lib.rs:211:21
[INFO] [stdout]     |
[INFO] [stdout] 211 | assert_eq!(Some(2), Week::Day("saturday".into()).tuple_count());
[INFO] [stdout]     |                     ^^^^^^^^^------------------- argument #2 of type `usize` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: tuple variant defined here
[INFO] [stdout]    --> src/lib.rs:208:5
[INFO] [stdout]     |
[INFO] [stdout] 208 |     Day(String, usize),
[INFO] [stdout]     |     ^^^
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 211 | assert_eq!(Some(2), Week::Day("saturday".into(), /* usize */).tuple_count());
[INFO] [stdout]     |                                                +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `tuple_count` found for enum `Week` in the current scope
[INFO] [stdout]    --> src/lib.rs:211:50
[INFO] [stdout]     |
[INFO] [stdout] 207 | enum Week {
[INFO] [stdout]     | --------- method `tuple_count` not found for this enum
[INFO] [stdout] ...
[INFO] [stdout] 211 | assert_eq!(Some(2), Week::Day("saturday".into()).tuple_count());
[INFO] [stdout]     |                                                  ^^^^^^^^^^^ method not found in `Week`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `tuple_count`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `TupleCount`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0432, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - ModifyField (line 221) stdout ----
[INFO] [stdout] error: expected `;`, found `assert_eq`
[INFO] [stdout]    --> src/lib.rs:233:39
[INFO] [stdout]     |
[INFO] [stdout] 233 | let obj = Thing::Object { x: 0, y: 0 }
[INFO] [stdout]     |                                       ^ help: add `;` here
[INFO] [stdout] 234 |
[INFO] [stdout] 235 | assert_eq!(Some(&0), obj.get_field("x"));
[INFO] [stdout]     | --------- unexpected token
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `delve::EnumModify`
[INFO] [stdout]    --> src/lib.rs:223:13
[INFO] [stdout]     |
[INFO] [stdout] 223 | use delve::{EnumModify, ModifyField};
[INFO] [stdout]     |             ^^^^^^^^^^ no `EnumModify` in the root
[INFO] [stdout]     |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]    --> src/lib.rs:65:23
[INFO] [stdout]     |
[INFO] [stdout]  64 | #[cfg(feature = "derive")]
[INFO] [stdout]     |       ------------------ the item is gated behind the `derive` feature
[INFO] [stdout]  65 | pub use delve_derive::EnumModify;
[INFO] [stdout]     |                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `EnumTuples` in this scope
[INFO] [stdout]    --> src/lib.rs:225:10
[INFO] [stdout]     |
[INFO] [stdout] 225 | #[derive(EnumTuples)]
[INFO] [stdout]     |          ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing this derive macro
[INFO] [stdout]     |
[INFO] [stdout] 220 + use delve_derive::EnumTuples;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `get_field` found for enum `Thing` in the current scope
[INFO] [stdout]    --> src/lib.rs:235:26
[INFO] [stdout]     |
[INFO] [stdout] 226 | enum Thing {
[INFO] [stdout]     | ---------- method `get_field` not found for this enum
[INFO] [stdout] ...
[INFO] [stdout] 235 | assert_eq!(Some(&0), obj.get_field("x"));
[INFO] [stdout]     |                          ^^^^^^^^^ method not found in `Thing`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `get_field`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `ModifyField`
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `set_field` found for enum `Thing` in the current scope
[INFO] [stdout]    --> src/lib.rs:236:5
[INFO] [stdout]     |
[INFO] [stdout] 226 | enum Thing {
[INFO] [stdout]     | ---------- method `set_field` not found for this enum
[INFO] [stdout] ...
[INFO] [stdout] 236 | obj.set_field("x", 100);
[INFO] [stdout]     |     ^^^^^^^^^ method not found in `Thing`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `set_field`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `ModifyField`
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `get_field` found for enum `Thing` in the current scope
[INFO] [stdout]    --> src/lib.rs:237:28
[INFO] [stdout]     |
[INFO] [stdout] 226 | enum Thing {
[INFO] [stdout]     | ---------- method `get_field` not found for this enum
[INFO] [stdout] ...
[INFO] [stdout] 237 | assert_eq!(Some(&100), obj.get_field("x"));
[INFO] [stdout]     |                            ^^^^^^^^^ method not found in `Thing`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `get_field`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `ModifyField`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - FieldNames (line 178)
[INFO] [stdout]     src/lib.rs - HasVariant (line 156)
[INFO] [stdout]     src/lib.rs - ModifyField (line 221)
[INFO] [stdout]     src/lib.rs - ModifyField (line 244)
[INFO] [stdout]     src/lib.rs - TupleCount (line 202)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 5 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.41s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6ac018e4bf6a09d7338d82600434408c53eb634271b265a67c3574e9cfe978ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ac018e4bf6a09d7338d82600434408c53eb634271b265a67c3574e9cfe978ca", kill_on_drop: false }`
[INFO] [stdout] 6ac018e4bf6a09d7338d82600434408c53eb634271b265a67c3574e9cfe978ca
