Bad bindings for empty C struct on windows

Input C Header

struct mystruct {
};

Bindgen Invocation

This is specifically for windows. I've installed LLVM according to the documentation, and I'm setting my LIBCLANG_PATH like so (in powershell):

$env:LIBCLANG_PATH="C:\Program Files\LLVM\bin\"

Then I invoke bindgen like so:

bindgen test.h  -o src/bindings.rs

Actual Results

/* automatically generated by rust-bindgen */

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct mystruct {
    pub _address: u8,
}
#[test]
fn bindgen_test_layout_mystruct() {
    assert_eq!(
        ::std::mem::size_of::<mystruct>(),
        4usize,
        concat!("Size of: ", stringify!(mystruct))
    );
    assert_eq!(
        ::std::mem::align_of::<mystruct>(),
        1usize,
        concat!("Alignment of ", stringify!(mystruct))
    );
}

Expected Results

I expected it to generate an empty rust struct, like so:

/* automatically generated by rust-bindgen */

#[repr(C)]
#[derive(Debug, Copy, Clone)]
pub struct mystruct {}
#[test]
fn bindgen_test_layout_mystruct() {
    assert_eq!(
        ::std::mem::size_of::<mystruct>(),
        0usize,
        concat!("Size of: ", stringify!(mystruct))
    );
    assert_eq!(
        ::std::mem::align_of::<mystruct>(),
        1usize,
        concat!("Alignment of ", stringify!(mystruct))
    );
}

From this issue I understand that the
_address field is supposed to be added for C++ structs, but this is a C struct. Also, the tests
that are generated are incorrect, the u8 _address field is 1usize not 4usize.

I've tested this on linux and it's not a problem there.

Here are the debugging logs:

[2019-11-20T23:44:04Z INFO  bindgen] Clang Version: clang version 8.0.1 (tags/RELEASE_801/final)
[2019-11-20T23:44:04Z WARN  bindgen] Using clang (8, 0), expected (3, 9)
[2019-11-20T23:44:04Z DEBUG bindgen] Generating bindings, libclang at C:\Program Files\LLVM\bin\libclang.dll
[2019-11-20T23:44:04Z DEBUG bindgen] Trying to find clang with flags: []
[2019-11-20T23:44:05Z DEBUG bindgen] Found clang: Clang { path: "C:\\Program Files\\LLVM\\bin\\clang.exe", version: Some(CXVersion { Major: 8, Minor: 0, Subminor: 1 }), c_search_paths: Some(["C:\\Program Files\\LLVM\\lib\\clang\\8.0.1\\include", "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Professional\\VC\\Tools\\MSVC\\14.23.28105\\include", "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.18362.0\\ucrt", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\shared", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\um", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\winrt"]), cpp_search_paths: Some(["C:\\Program Files\\LLVM\\lib\\clang\\8.0.1\\include", "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Professional\\VC\\Tools\\MSVC\\14.23.28105\\include", "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.18362.0\\ucrt", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\shared", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\um", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\winrt"]) }
[2019-11-20T23:44:05Z DEBUG bindgen] Fixed-up options: BindgenOptions { blacklisted_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, blacklisted_functions: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, blacklisted_items: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, opaque_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, rustfmt_path: None, whitelisted_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, whitelisted_functions: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, whitelisted_vars: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, default_enum_style: Consts, bitfield_enums: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, rustified_enums: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, rustified_non_exhaustive_enums: RegexSet { items: [], matched: [], set: None, record_matches: false }, constified_enum_modules: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, constified_enums: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, builtins: false, emit_ast: false, emit_ir: false, emit_ir_graphviz: None, enable_cxx_namespaces: false, enable_function_attribute_detection: false, disable_name_namespacing: false, layout_tests: true, impl_debug: false, impl_partialeq: false, derive_copy: true, derive_debug: true, derive_default: false, derive_hash: false, derive_partialord: false, derive_ord: false, derive_partialeq: false, derive_eq: false, use_core: false, ctypes_prefix: None, time_phases: false, namespaced_constants: true, msvc_mangling: false, convert_floats: true, raw_lines: [], module_lines: {}, clang_args: ["-isystem", "C:\\Program Files\\LLVM\\lib\\clang\\8.0.1\\include", "-isystem", "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Professional\\VC\\Tools\\MSVC\\14.23.28105\\include", "-isystem", "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.18362.0\\ucrt", "-isystem", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\shared", "-isystem", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\um", "-isystem", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\winrt", "test.h"], input_header: Some("test.h"), input_unsaved_files: [], parse_callbacks: None, codegen_config: FUNCTIONS | TYPES | VARS | METHODS | CONSTRUCTORS | DESTRUCTORS, conservative_inline_namespaces: false, generate_comments: true, generate_inline_functions: false, whitelist_recursively: true, objc_extern_crate: false, generate_block: false, block_extern_crate: false, enable_mangling: true, detect_include_paths: true, prepend_enum_name: true, rust_target: Stable_1_33, rust_features: RustFeatures { untagged_union: true, associated_const: true, builtin_clone_impls: true, repr_align: true, i128_and_u128: true, must_use_function: true, repr_transparent: true, min_const_fn: true, repr_packed_n: true, thiscall_abi: false, non_exhaustive: false }, record_matches: true, rustfmt_bindings: true, rustfmt_configuration_file: None, no_partialeq_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, no_copy_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, no_hash_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, array_pointers_in_arguments: false }
[2019-11-20T23:44:05Z DEBUG bindgen::ir::item] Item::from_ty_with_id: ItemId(1)
        ty = Type(struct mystruct, kind: Record, cconv: 100, decl: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct")), canon: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))),
        location = Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))
[2019-11-20T23:44:05Z DEBUG bindgen::ir::context] builtin_or_resolved_ty: Type(struct mystruct, kind: Record, cconv: 100, decl: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct")), canon: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))), Some(Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))), Some(ItemId(0))
[2019-11-20T23:44:05Z DEBUG bindgen::ir::context] Not resolved, maybe builtin?
[2019-11-20T23:44:05Z DEBUG bindgen::ir::context] builtin_or_resolved_ty: Type(struct mystruct, kind: Record, cconv: 100, decl: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct")), canon: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))), Some(Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))), Some(ItemId(0))
[2019-11-20T23:44:05Z DEBUG bindgen::ir::context] Not resolved, maybe builtin?
[2019-11-20T23:44:05Z DEBUG bindgen::ir::ty] from_clang_ty: ItemId(1), ty: Type(struct mystruct, kind: Record, cconv: 100, decl: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct")), canon: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))), loc: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))
[2019-11-20T23:44:05Z DEBUG bindgen::ir::ty] currently_parsed_types: [PartialType { decl: Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct")), id: ItemId(1) }]
[2019-11-20T23:44:05Z DEBUG bindgen::ir::comp] CompInfo::from_ty(Struct, Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct")))
[2019-11-20T23:44:05Z DEBUG bindgen::ir::context] BindgenContext::add_item(Item { id: ItemId(1), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false, derives: [] }, parent_id: ItemId(0), kind: Type(Type { name: Some("mystruct"), layout: Some(Layout { size: 4, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: BeforeComputingBitfieldUnits([]), template_params: [], methods: [], constructors: [], destructor: None, base_members: [], inner_types: [], inner_vars: [], has_own_virtual_method: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed_attr: false, found_unknown_attr: false, is_forward_declaration: false }), is_const: false }) }, declaration: Some(Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct"))), loc: Some(Cursor(mystruct kind: StructDecl, loc: test.h:1:8, usr: Some("c:@S@mystruct")))
[2019-11-20T23:44:05Z DEBUG bindgen::ir::context] add_item_to_module: adding ItemId(1) as child of parent module ItemId(0)
[2019-11-20T23:44:05Z DEBUG bindgen::ir::context] No replacements to process
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::has_vtable] constrain ItemId(1)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::has_vtable]     comp considers its own methods and bases
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::has_vtable] constrain ItemId(0)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::sizedness] constrain TypeId(ItemId(1))
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::sizedness]     comp considers its own fields and bases
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::sizedness] inserting ZeroSized for TypeId(ItemId(1))
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::template_params] constrain ItemId(1)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::template_params]   initially, used set is {}
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::template_params]     other item: join with successors' usage
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::template_params]   finally, used set is {}
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::template_params] constrain ItemId(0)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::template_params]   initially, used set is {}
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::template_params]     other item: join with successors' usage
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::template_params]   finally, used set is {}
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] constrain: ItemId(1)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] ty: Type { name: Some("mystruct"), layout: Some(Layout { size: 4, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: AfterComputingBitfieldUnits([]), template_params: [], methods: [], constructors: [], destructor: None, base_members: [], inner_types: [], inner_vars: [], has_own_virtual_method: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed_attr: false, found_unknown_attr: false, is_forward_declaration: false }), is_const: false }
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive]     can derive Debug because there are no members
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] inserting ItemId(1) can_derive<Debug>=Yes
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] constrain: ItemId(0)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive]     can derive Debug because there are no members
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] inserting ItemId(0) can_derive<Debug>=Yes
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] constrain: ItemId(1)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] ty: Type { name: Some("mystruct"), layout: Some(Layout { size: 4, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: AfterComputingBitfieldUnits([]), template_params: [], methods: [], constructors: [], destructor: None, base_members: [], inner_types: [], inner_vars: [], has_own_virtual_method: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed_attr: false, found_unknown_attr: false, is_forward_declaration: false }), is_const: false }
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive]     can derive Copy because there are no members
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] inserting ItemId(1) can_derive<Copy>=Yes
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] constrain: ItemId(0)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive]     can derive Copy because there are no members
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::derive] inserting ItemId(0) can_derive<Copy>=Yes
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::has_type_param_in_array] constrain: ItemId(1)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::has_type_param_in_array]     comp doesn't have array
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::has_type_param_in_array] constrain: ItemId(0)
[2019-11-20T23:44:05Z TRACE bindgen::ir::analysis::has_type_param_in_array]     not a type; ignoring
[2019-11-20T23:44:05Z DEBUG bindgen::codegen] codegen: BindgenOptions { blacklisted_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, blacklisted_functions: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, blacklisted_items: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, opaque_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, rustfmt_path: None, whitelisted_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, whitelisted_functions: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, whitelisted_vars: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, default_enum_style: Consts, bitfield_enums: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, rustified_enums: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, rustified_non_exhaustive_enums: RegexSet { items: [], matched: [], set: None, record_matches: false }, constified_enum_modules: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, constified_enums: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, builtins: false, emit_ast: false, emit_ir: false, emit_ir_graphviz: None, enable_cxx_namespaces: false, enable_function_attribute_detection: false, disable_name_namespacing: false, layout_tests: true, impl_debug: false, impl_partialeq: false, derive_copy: true, derive_debug: true, derive_default: false, derive_hash: false, derive_partialord: false, derive_ord: false, derive_partialeq: false, derive_eq: false, use_core: false, ctypes_prefix: None, time_phases: false, namespaced_constants: true, msvc_mangling: false, convert_floats: true, raw_lines: [], module_lines: {}, clang_args: ["-isystem", "C:\\Program Files\\LLVM\\lib\\clang\\8.0.1\\include", "-isystem", "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Professional\\VC\\Tools\\MSVC\\14.23.28105\\include", "-isystem", "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.18362.0\\ucrt", "-isystem", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\shared", "-isystem", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\um", "-isystem", "C:\\Program Files (x86)\\Windows Kits\\10\\include\\10.0.18362.0\\winrt", "test.h"], input_header: Some("test.h"), input_unsaved_files: [], parse_callbacks: None, codegen_config: FUNCTIONS | TYPES | VARS | METHODS | CONSTRUCTORS | DESTRUCTORS, conservative_inline_namespaces: false, generate_comments: true, generate_inline_functions: false, whitelist_recursively: true, objc_extern_crate: false, generate_block: false, block_extern_crate: false, enable_mangling: true, detect_include_paths: true, prepend_enum_name: true, rust_target: Stable_1_33, rust_features: RustFeatures { untagged_union: true, associated_const: true, builtin_clone_impls: true, repr_align: true, i128_and_u128: true, must_use_function: true, repr_transparent: true, min_const_fn: true, repr_packed_n: true, thiscall_abi: false, non_exhaustive: false }, record_matches: true, rustfmt_bindings: true, rustfmt_configuration_file: None, no_partialeq_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, no_copy_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, no_hash_types: RegexSet { items: [], matched: [], set: Some(RegexSet([])), record_matches: true }, array_pointers_in_arguments: false }
[2019-11-20T23:44:05Z DEBUG bindgen::codegen] <Item as CodeGenerator>::codegen: self = Item { id: ItemId(0), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false, derives: [] }, parent_id: ItemId(0), kind: Module(Module { name: Some("root"), kind: Normal, children: {ItemId(1)} }) }
[2019-11-20T23:44:05Z DEBUG bindgen::codegen] <Module as CodeGenerator>::codegen: item = Item { id: ItemId(0), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false, derives: [] }, parent_id: ItemId(0), kind: Module(Module { name: Some("root"), kind: Normal, children: {ItemId(1)} }) }
[2019-11-20T23:44:05Z DEBUG bindgen::codegen] <Item as CodeGenerator>::codegen: self = Item { id: ItemId(1), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false, derives: [] }, parent_id: ItemId(0), kind: Type(Type { name: Some("mystruct"), layout: Some(Layout { size: 4, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: AfterComputingBitfieldUnits([]), template_params: [], methods: [], constructors: [], destructor: None, base_members: [], inner_types: [], inner_vars: [], has_own_virtual_method: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed_attr: false, found_unknown_attr: false, is_forward_declaration: false }), is_const: false }) }
[2019-11-20T23:44:05Z DEBUG bindgen::codegen] <Type as CodeGenerator>::codegen: item = Item { id: ItemId(1), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false, derives: [] }, parent_id: ItemId(0), kind: Type(Type { name: Some("mystruct"), layout: Some(Layout { size: 4, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: AfterComputingBitfieldUnits([]), template_params: [], methods: [], constructors: [], destructor: None, base_members: [], inner_types: [], inner_vars: [], has_own_virtual_method: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed_attr: false, found_unknown_attr: false, is_forward_declaration: false }), is_const: false }) }
[2019-11-20T23:44:05Z DEBUG bindgen::codegen] <CompInfo as CodeGenerator>::codegen: item = Item { id: ItemId(1), local_id: Cell { value: None }, next_child_local_id: Cell { value: 1 }, canonical_name_cache: RefCell { value: None }, comment: None, annotations: Annotations { opaque: false, hide: false, use_instead_of: None, disallow_copy: false, private_fields: None, accessor_kind: None, constify_enum_variant: false, derives: [] }, parent_id: ItemId(0), kind: Type(Type { name: Some("mystruct"), layout: Some(Layout { size: 4, align: 1, packed: false }), kind: Comp(CompInfo { kind: Struct, fields: AfterComputingBitfieldUnits([]), template_params: [], methods: [], constructors: [], destructor: None, base_members: [], inner_types: [], inner_vars: [], has_own_virtual_method: false, has_destructor: false, has_nonempty_base: false, has_non_type_template_params: false, packed_attr: false, found_unknown_attr: false, is_forward_declaration: false }), is_const: false }) }

Start by reproducing the Windows bindgen invocation with the empty C struct shown in the issue, then trace how empty records and layout tests are generated. Compare the Windows output with the Linux behavior. Done means generating an empty Rust struct for the C record and reporting a zero-size layout without the incorrect _address field.