[Bug 55657] New: ntdll:exception - test_thread_context() fails on macOS

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55657

Bug ID: 55657
           Summary: ntdll:exception - test_thread_context() fails on macOS
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]

ntdll:exception - test_thread_context() fails on macOS:

exception.c:4266: Test failed: wrong SegDs 0000000000000023/0000000000000000
exception.c:4267: Test failed: wrong SegEs 0000000000000023/0000000000000000

See https://test.winehq.org/data/patterns.html#ntdll:exception

These failures are systematic, started on 2023-09-11 (three related commits
that day), and only happen on macOS (see Remi's rbernon-macos-* cloud test
machines).