[INFO] fetching crate empty_type_derive 0.2.3...
[INFO] testing empty_type_derive-0.2.3 against 1.90.0 for beta-1.91-3
[INFO] extracting crate empty_type_derive 0.2.3 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate empty_type_derive 0.2.3
[INFO] finished tweaking crates.io crate empty_type_derive 0.2.3
[INFO] tweaked toml for crates.io crate empty_type_derive 0.2.3 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate empty_type_derive 0.2.3 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.106)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded empty_type_traits v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 694db1115f9c13ade76424a856dd3390d09fb51c90c85c193fe79f9819ff050e
[INFO] running `Command { std: "docker" "start" "-a" "694db1115f9c13ade76424a856dd3390d09fb51c90c85c193fe79f9819ff050e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "694db1115f9c13ade76424a856dd3390d09fb51c90c85c193fe79f9819ff050e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "694db1115f9c13ade76424a856dd3390d09fb51c90c85c193fe79f9819ff050e", kill_on_drop: false }`
[INFO] [stdout] 694db1115f9c13ade76424a856dd3390d09fb51c90c85c193fe79f9819ff050e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b68d84d02c8e0f12e27aa6ba476b09c62d2d525181ce0595da961940c41f0f31
[INFO] running `Command { std: "docker" "start" "-a" "b68d84d02c8e0f12e27aa6ba476b09c62d2d525181ce0595da961940c41f0f31", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling empty_type_traits v0.2.2
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling empty_type_derive v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `docs_rs`
[INFO] [stdout]   --> src/lib.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![cfg_attr(docs_rs, feature(doc_cfg))]
[INFO] [stdout]    |             ^^^^^^^ help: there is a config with a similar name: `docsrs`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docs_rs)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(docs_rs)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `docs_rs`
[INFO] [stdout]   --> src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | #[cfg_attr(docs_rs, doc(cfg(feature = "derive")))]
[INFO] [stdout]    |            ^^^^^^^ help: there is a config with a similar name: `docsrs`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docs_rs)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(docs_rs)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `container_attributes` is never read
[INFO] [stdout]   --> src/type_information.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct TypeInformation {
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub container_attributes: Vec<Attribute>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.45s
[INFO] running `Command { std: "docker" "inspect" "b68d84d02c8e0f12e27aa6ba476b09c62d2d525181ce0595da961940c41f0f31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b68d84d02c8e0f12e27aa6ba476b09c62d2d525181ce0595da961940c41f0f31", kill_on_drop: false }`
[INFO] [stdout] b68d84d02c8e0f12e27aa6ba476b09c62d2d525181ce0595da961940c41f0f31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d81f31f90a558640af161b8ba73d6d81f264fce853e978eb2b726789a7526c47
[INFO] running `Command { std: "docker" "start" "-a" "d81f31f90a558640af161b8ba73d6d81f264fce853e978eb2b726789a7526c47", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling empty_type_traits v0.2.2
[INFO] [stderr]    Compiling empty_type_derive v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `docs_rs`
[INFO] [stdout]   --> src/lib.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![cfg_attr(docs_rs, feature(doc_cfg))]
[INFO] [stdout]    |             ^^^^^^^ help: there is a config with a similar name: `docsrs`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docs_rs)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(docs_rs)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `docs_rs`
[INFO] [stdout]   --> src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | #[cfg_attr(docs_rs, doc(cfg(feature = "derive")))]
[INFO] [stdout]    |            ^^^^^^^ help: there is a config with a similar name: `docsrs`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docs_rs)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(docs_rs)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `docs_rs`
[INFO] [stdout]   --> src/lib.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![cfg_attr(docs_rs, feature(doc_cfg))]
[INFO] [stdout]    |             ^^^^^^^ help: there is a config with a similar name: `docsrs`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docs_rs)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(docs_rs)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `docs_rs`
[INFO] [stdout]   --> src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | #[cfg_attr(docs_rs, doc(cfg(feature = "derive")))]
[INFO] [stdout]    |            ^^^^^^^ help: there is a config with a similar name: `docsrs`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(docs_rs)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(docs_rs)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `container_attributes` is never read
[INFO] [stdout]   --> src/type_information.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct TypeInformation {
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub container_attributes: Vec<Attribute>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `container_attributes` is never read
[INFO] [stdout]   --> src/type_information.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct TypeInformation {
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub container_attributes: Vec<Attribute>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `empty_type::deserialize_empty`
[INFO] [stdout]    --> tests/serde_borrow.rs:17:18
[INFO] [stdout]     |
[INFO] [stdout]  17 | use empty_type::{deserialize_empty, EmptyType};
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^ no `deserialize_empty` in the root
[INFO] [stdout]     |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/empty_type_traits-0.2.2/src/lib.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | #[cfg(feature = "serde")]
[INFO] [stdout]     |       ----------------- the item is gated behind the `serde` feature
[INFO] [stdout] 106 | #[cfg_attr(docs_rs, doc(cfg(feature = "serde")))]
[INFO] [stdout] 107 | pub fn deserialize_empty<'de, T, D>(de: D) -> Result<Empty<T>, D::Error>
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Deserialize` in this scope
[INFO] [stdout]   --> tests/serde_borrow.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 | #[derive(EmptyType, Deserialize)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Deserialize` is imported here, but it is only a trait, without a derive macro
[INFO] [stdout]   --> tests/serde_borrow.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use serde::Deserialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `serde` in this scope
[INFO] [stdout]   --> tests/serde_borrow.rs:25:7
[INFO] [stdout]    |
[INFO] [stdout] 25 |     #[serde(borrow)]
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `serde` is in scope, but it is a crate, not an attribute
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Deserialize` in this scope
[INFO] [stdout]   --> tests/serde.rs:21:21
[INFO] [stdout]    |
[INFO] [stdout] 21 | #[derive(EmptyType, Deserialize)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Deserialize` is imported here, but it is only a trait, without a derive macro
[INFO] [stdout]   --> tests/serde.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use serde::Deserialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Deserialize` in this scope
[INFO] [stdout]   --> tests/serde_borrow.rs:30:10
[INFO] [stdout]    |
[INFO] [stdout] 30 | #[derive(Deserialize)]
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Deserialize` is imported here, but it is only a trait, without a derive macro
[INFO] [stdout]   --> tests/serde_borrow.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use serde::Deserialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Data` is never constructed
[INFO] [stdout]   --> tests/base_cases.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Data(String, usize);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `serde` in this scope
[INFO] [stdout]   --> tests/serde_borrow.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Inner<'a>(#[serde(borrow)] Cow<'a, str>);
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `serde` is in scope, but it is a crate, not an attribute
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `___EmptyTestStruct: serde::Deserialize<'de>` is not satisfied
[INFO] [stdout]     --> tests/serde.rs:44:55
[INFO] [stdout]      |
[INFO] [stdout]   44 |     let value: <TestStruct as EmptyType>::Container = serde_json::from_str(json).unwrap();
[INFO] [stdout]      |                                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `___EmptyTestStruct`
[INFO] [stdout]      |
[INFO] [stdout]      = note: for local types consider adding `#[derive(serde::Deserialize)]` to your `___EmptyTestStruct` type
[INFO] [stdout]      = note: for types from other crates check whether the crate offers a `serde` feature flag
[INFO] [stdout]      = help: the following other types implement trait `Deserialize<'de>`:
[INFO] [stdout]                &'a Path
[INFO] [stdout]                &'a [u8]
[INFO] [stdout]                &'a str
[INFO] [stdout]                ()
[INFO] [stdout]                (T,)
[INFO] [stdout]                (T0, T1)
[INFO] [stdout]                (T0, T1, T2)
[INFO] [stdout]                (T0, T1, T2, T3)
[INFO] [stdout]              and 141 others
[INFO] [stdout] note: required by a bound in `serde_json::from_str`
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/serde_json-1.0.145/src/de.rs:2699:8
[INFO] [stdout]      |
[INFO] [stdout] 2697 | pub fn from_str<'a, T>(s: &'a str) -> Result<T>
[INFO] [stdout]      |        -------- required by a bound in this function
[INFO] [stdout] 2698 | where
[INFO] [stdout] 2699 |     T: de::Deserialize<'a>,
[INFO] [stdout]      |        ^^^^^^^^^^^^^^^^^^^ required by this bound in `from_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TestStruct` is never constructed
[INFO] [stdout]   --> tests/vis.rs:21:16
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub struct TestStruct {
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `empty_type_derive` (test "serde") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0432]: unresolved import `empty_type::deserialize_empty`
[INFO] [stdout]    --> tests/serde_default.rs:17:18
[INFO] [stdout]     |
[INFO] [stdout]  17 | use empty_type::{deserialize_empty, EmptyType};
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^ no `deserialize_empty` in the root
[INFO] [stdout]     |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/empty_type_traits-0.2.2/src/lib.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | #[cfg(feature = "serde")]
[INFO] [stdout]     |       ----------------- the item is gated behind the `serde` feature
[INFO] [stdout] 106 | #[cfg_attr(docs_rs, doc(cfg(feature = "serde")))]
[INFO] [stdout] 107 | pub fn deserialize_empty<'de, T, D>(de: D) -> Result<Empty<T>, D::Error>
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Deserialize` in this scope
[INFO] [stdout]   --> tests/serde_default.rs:21:21
[INFO] [stdout]    |
[INFO] [stdout] 21 | #[derive(EmptyType, Deserialize)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Deserialize` is imported here, but it is only a trait, without a derive macro
[INFO] [stdout]   --> tests/serde_default.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use serde::Deserialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Deserialize` in this scope
[INFO] [stdout]   --> tests/serde_default.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 | #[derive(EmptyType, Deserialize)]
[INFO] [stdout]    |                     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Deserialize` is imported here, but it is only a trait, without a derive macro
[INFO] [stdout]   --> tests/serde_default.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use serde::Deserialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Deserialize` in this scope
[INFO] [stdout]   --> tests/serde_default.rs:34:10
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[derive(Deserialize, Default, Debug, PartialEq)]
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Deserialize` is imported here, but it is only a trait, without a derive macro
[INFO] [stdout]   --> tests/serde_default.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use serde::Deserialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `empty_type_derive` (test "serde_borrow") due to 5 previous errors
[INFO] [stderr] error: could not compile `empty_type_derive` (test "serde_default") due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "d81f31f90a558640af161b8ba73d6d81f264fce853e978eb2b726789a7526c47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d81f31f90a558640af161b8ba73d6d81f264fce853e978eb2b726789a7526c47", kill_on_drop: false }`
[INFO] [stdout] d81f31f90a558640af161b8ba73d6d81f264fce853e978eb2b726789a7526c47
