rust-spec 0.6.1

Classification of types in accordance with the Rust specification
Documentation 
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error[E0283]: type annotations needed
 --> tests/ui_fail/drop_without_attribute.rs:6:8
  |
6 | struct RustStruct(u8);
  |        ^^^^^^^^^^ cannot infer type
  |
note: multiple `impl`s satisfying `RustStruct: <RustStruct as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
 --> tests/ui_fail/drop_without_attribute.rs:5:10
  |
5 | #[derive(RustSpec)]
  |          ^^^^^^^^
  = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:14:8
   |
14 | struct ReprCStruct(u8);
   |        ^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `ReprCStruct: <ReprCStruct as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:12:10
   |
12 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:22:8
   |
22 | struct TransparentStruct(u8);
   |        ^^^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `TransparentStruct: <TransparentStruct as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:20:10
   |
20 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:29:8
   |
29 | struct Generic<T>(core::marker::PhantomData<T>);
   |        ^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `Generic<T>: <Generic<T> as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:28:10
   |
28 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:37:6
   |
37 | enum TransparentEnum {
   |      ^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `TransparentEnum: <TransparentEnum as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:35:10
   |
35 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:46:6
   |
46 | enum RustDataEnum {
   |      ^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `RustDataEnum: <RustDataEnum as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:45:10
   |
45 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:57:6
   |
57 | enum PrimitiveDataEnum {
   |      ^^^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `PrimitiveDataEnum: <PrimitiveDataEnum as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:55:10
   |
55 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:68:6
   |
68 | enum FieldlessEnum {
   |      ^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `FieldlessEnum: <FieldlessEnum as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:66:10
   |
66 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:79:6
   |
79 | enum DataEnum {
   |      ^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `DataEnum: <DataEnum as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:77:10
   |
77 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/drop_without_attribute.rs:89:7
   |
89 | union ValueUnion {
   |       ^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `ValueUnion: <ValueUnion as _::AssertNoDrop>::check::DropImplIsNotSupported<_>` found
  --> tests/ui_fail/drop_without_attribute.rs:88:10
   |
88 | #[derive(RustSpec)]
   |          ^^^^^^^^
   = note: this error originates in the derive macro `RustSpec` (in Nightly builds, run with -Z macro-backtrace for more info)