Index: clang/lib/Parse/ParseDecl.cpp
===================================================================
--- clang/lib/Parse/ParseDecl.cpp
+++ clang/lib/Parse/ParseDecl.cpp
@@ -6205,6 +6205,11 @@
         // is exited (and the declarator has been parsed).
         DeclScopeObj.EnterDeclaratorScope();
     }
+    if (D.hasName() && !D.getIdentifier())
+      Diag(getMissingDeclaratorIdLoc(D, Tok.getLocation()),
+           diag::err_expected_member_name_or_semi)
+          << (D.getDeclSpec().isEmpty() ? SourceRange()
+                                        : D.getDeclSpec().getSourceRange());
   } else if (D.mayOmitIdentifier()) {
     // This could be something simple like "int" (in which case the declarator
     // portion is empty), if an abstract-declarator is allowed.
Index: clang/lib/Sema/SemaDeclCXX.cpp
===================================================================
--- clang/lib/Sema/SemaDeclCXX.cpp
+++ clang/lib/Sema/SemaDeclCXX.cpp
@@ -15440,6 +15440,11 @@
         break;
       }
     }
+    if (LLVM_UNLIKELY(!Pattern))
+      for (const auto *FD : ClassPattern->fields())
+        if (Diags.hasErrorOccurred() && !FD->getIdentifier()) {
+          return ExprError();
+        }
     assert(Pattern && "We must have set the Pattern!");
 
     if (!Pattern->hasInClassInitializer() ||