[Webkit-unassigned] [Bug 234498] New: [Win] MSVC reports "COMPropertyBag.h(233): error C2385: ambiguous access of 'IUnknown'" with /std:c++20

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Dec 19 20:32:41 PST 2021


https://bugs.webkit.org/show_bug.cgi?id=234498

            Bug ID: 234498
           Summary: [Win] MSVC reports "COMPropertyBag.h(233): error
                    C2385: ambiguous access of 'IUnknown'" with /std:c++20
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Hironori.Fujii at sony.com
            Blocks: 233448

[Win] MSVC reports "COMPropertyBag.h(233): error C2385: ambiguous access of 'IUnknown'" with /std:c++20

> C:\home\webkit\gc\Source\WebKitLegacy\win\COMPropertyBag.h(233): error C2385: ambiguous access of 'IUnknown'

This problem has been reported in the following ticket, and it has a workaround.

error C2385: ambiguous access of 'IUnknown' referring to common base class in VS2017.7 Preview 3 - Visual Studio Feedback
https://developercommunity.visualstudio.com/t/error-c2385-ambiguous-access-of-iunknown-referring/230955


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=233448
[Bug 233448] [CMake][MSVC] Compile with /permissive-
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