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    Bug 
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    Resolution: Done
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    P2: Important 
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    Qt Creator 6.0.0
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    None
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    Windows 10 64bit
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        02f93f68d64ea72e6cfd57ed2b14b344d26b05b0 (qt-creator/qt-creator/6.0)
I set cpp.cxxLanguageVersion: "c+23" for my qbs project in order to set "/std:clatest" flag for MSVC to enable some features which are disabled in "/std:c+20".
With cpp.cxxLanguageVersion: "c+23", clang code model does not recognize C+ standard version and displays invalid errors.
This is case for both of clangd and libclang.
See the attachment for details.