Fix assertion failure when parsing linkage specifications (PR5921),

from Keir Mierle!

llvm-svn: 95516

clang/lib/Parse/ParseDeclCXX.cpp

@@ -191,6 +191,8 @@ Parser::DeclPtrTy Parser::ParseLinkage(ParsingDeclSpec &DS,
                                                    SourceLocation());
   }
 
+  DS.abort();
+
   if (Attr.HasAttr)
     Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed)
       << Attr.Range;

clang/lib/Parse/Parser.cpp

@@ -593,7 +593,6 @@ Parser::ParseDeclarationOrFunctionDefinition(ParsingDeclSpec &DS,
   if (Tok.is(tok::string_literal) && getLang().CPlusPlus &&
       DS.getStorageClassSpec() == DeclSpec::SCS_extern &&
       DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) {
-    DS.abort();
     DeclPtrTy TheDecl = ParseLinkage(DS, Declarator::FileContext);
     return Actions.ConvertDeclToDeclGroup(TheDecl);
   }

clang/test/CodeGenCXX/extern-c.cpp

@@ -10,4 +10,7 @@ extern int b;
 // RUN: grep "@_ZN3foo1cE = global i32" %t | count 1
 int c = 5;
 
+// RUN: not grep "@_ZN3foo1dE" %t
+extern "C" struct d;
+
 }