Clang crashed while checking for deletion of copy and move ctors

    Crash:
       @     0x559d129463fc  clang::CXXRecordDecl::defaultedCopyConstructorIsDeleted()
        @     0x559d1288d3e5  clang::Sema::checkIllFormedTrivialABIStruct()::$_7::operator()()
        @     0x559d12884c34  clang::Sema::checkIllFormedTrivialABIStruct()
        @     0x559d1288412e  clang::Sema::CheckCompletedCXXClass()
        @     0x559d1288d843  clang::Sema::ActOnFinishCXXMemberSpecification()
        @     0x559d12020109  clang::Parser::ParseCXXMemberSpecification()
        @     0x559d1201e80c  clang::Parser::ParseClassSpecifier()
        @     0x559d1204e807  clang::Parser::ParseDeclarationSpecifiers()
        @     0x559d120e9aa9  clang::Parser::ParseSingleDeclarationAfterTemplate()
        @     0x559d120e8f21  clang::Parser::ParseTemplateDeclarationOrSpecialization()
        @     0x559d120e8886  clang::Parser::ParseDeclarationStartingWithTemplate()
        @     0x559d1204a1d4  clang::Parser::ParseDeclaration()
        @     0x559d12004b1d  clang::Parser::ParseExternalDeclaration()
        @     0x559d12017689  clang::Parser::ParseInnerNamespace()
        @     0x559d12017024  clang::Parser::ParseNamespace()
        @     0x559d1204a29b  clang::Parser::ParseDeclaration()
        @     0x559d12004c74  clang::Parser::ParseExternalDeclaration()

    Subscribers: cfe-commits

    Tags: #clang

    Differential Revision: https://reviews.llvm.org/D83263