Bug: `Error: 'struct' value has no field or method 'inputs'` with `xcodeproj <- ios_unit_test <- swift_library <- mixed_language_library`

Description

Hi,

I have the following setup: xcodeproj <- ios_unit_test <- swift_library <- mixed_language_library.

When i try to generate Xcode project i get the following error:

$ make proj
...
Generating "Sources.xcodeproj"
ERROR: /Users/vakhid.betrakhmadov/Downloads/xcodeproj_repro/BUILD:6:23: in @@rules_xcodeproj_generated//generator/SourcesXcodeproj:defs.bzl%_aspect aspect on mixed_language_library rule //:Sources: 
Traceback (most recent call last):
        File "/private/var/tmp/_bazel_vakhid.betrakhmadov/ab443e025f65f734bd19129783791644/rules_xcodeproj.noindex/build_output_base/external/rules_xcodeproj/xcodeproj/internal/xcodeproj_incremental_aspect.bzl", line 110, column 47, in _xcodeproj_incremental_aspect_impl
                info = incremental_xcodeprojinfos.make(
        File "/private/var/tmp/_bazel_vakhid.betrakhmadov/ab443e025f65f734bd19129783791644/rules_xcodeproj.noindex/build_output_base/external/rules_xcodeproj/xcodeproj/internal/incremental_xcodeprojinfos.bzl", line 807, column 61, in _make_xcodeprojinfo
                info_fields = _make_non_skipped_target_xcodeprojinfo(
        File "/private/var/tmp/_bazel_vakhid.betrakhmadov/ab443e025f65f734bd19129783791644/rules_xcodeproj.noindex/build_output_base/external/rules_xcodeproj/xcodeproj/internal/incremental_xcodeprojinfos.bzl", line 577, column 51, in _make_non_skipped_target_xcodeprojinfo
                ) = mixed_language_library_targets.process(
        File "/private/var/tmp/_bazel_vakhid.betrakhmadov/ab443e025f65f734bd19129783791644/rules_xcodeproj.noindex/build_output_base/external/rules_xcodeproj/xcodeproj/internal/processed_targets/mixed_language_library_targets.bzl", line 106, column 77, in _process_mixed_language_library_target
                mergeable_info_and_ids = mergeable_infos_module.calculate_mixed_language(
        File "/private/var/tmp/_bazel_vakhid.betrakhmadov/ab443e025f65f734bd19129783791644/rules_xcodeproj.noindex/build_output_base/external/rules_xcodeproj/xcodeproj/internal/processed_targets/mergeable_infos.bzl", line 123, column 50, in _calculate_mixed_language_mergeable_info
                return _handle_mixed_language_mergeable_infos(
        File "/private/var/tmp/_bazel_vakhid.betrakhmadov/ab443e025f65f734bd19129783791644/rules_xcodeproj.noindex/build_output_base/external/rules_xcodeproj/xcodeproj/internal/processed_targets/mergeable_infos.bzl", line 161, column 37, in _handle_mixed_language_mergeable_infos
                return _swift_mergeable_info(
        File "/private/var/tmp/_bazel_vakhid.betrakhmadov/ab443e025f65f734bd19129783791644/rules_xcodeproj.noindex/build_output_base/external/rules_xcodeproj/xcodeproj/internal/processed_targets/mergeable_infos.bzl", line 266, column 46, in _swift_mergeable_info
                extra_file_paths = mergeable_info.inputs.extra_file_paths,
Error: 'struct' value has no field or method 'inputs'

Reproduction steps

I have created a minimal repro: https://github.com/vakhidbetrakhmadov/xcodeproj_repro/tree/main
Run: make proj

Expected behavior

Xcode project is successfully generated

rules_xcodeproj version

2.8.1

Xcode version

15.4.0 (15F31d)

Bazel version

7.4.0

rules_apple version

3.11.2

rules_swift version

2.2.2

Additional information

If i replace mixed_language_library with

swift_library(
    name = "Sources",
    srcs = [
        "Sources/Dummy.swift",
    ],
)

it works as expected.