Fix a crash that occurs in this C++ case:

struct foo {
  static bool value;
};
bool (foo::value); // crash because of parens

llvm-svn: 76538

clang/include/clang/Parse/Parser.h

@@ -1080,18 +1080,23 @@ private:
   class DeclaratorScopeObj {
     Parser &P;
     CXXScopeSpec &SS;
+    bool EnteredScope;
   public:
-    DeclaratorScopeObj(Parser &p, CXXScopeSpec &ss) : P(p), SS(ss) {}
+    DeclaratorScopeObj(Parser &p, CXXScopeSpec &ss)
+      : P(p), SS(ss), EnteredScope(false) {}
 
     void EnterDeclaratorScope() {
-      if (SS.isSet())
+      assert(SS.isSet() && "C++ scope was not set!");
       P.Actions.ActOnCXXEnterDeclaratorScope(P.CurScope, SS);
+      EnteredScope = true;
     }
 
     ~DeclaratorScopeObj() {
-      if (SS.isSet())
+      if (EnteredScope) {
+        assert(SS.isSet() && "C++ scope was cleared ?");
         P.Actions.ActOnCXXExitDeclaratorScope(P.CurScope, SS);
       }
+    }
   };
   
   /// ParseDeclarator - Parse and verify a newly-initialized declarator.

clang/test/SemaCXX/nested-name-spec.cpp

@@ -172,7 +172,10 @@ X::X() : a(5) { } // expected-error{{use of undeclared identifier 'X'}} \
       // expected-error{{C++ requires a type specifier for all declarations}} \
       // expected-error{{only constructors take base initializers}}
 
-
+struct foo_S {
+  static bool value;
+};
+bool (foo_S::value);
 
 
 namespace somens {