2 files changed, 13 insertions, 3 deletions
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index 9eb497bea6..ed22235593 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -517,7 +517,7 @@ bool Type::isIntegerType() const {
   if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
     // Incomplete enum types are not treated as integer types.
     // FIXME: In C++, enum types are never integer types.
-    return ET->getDecl()->isComplete();
+    return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped();
   return false;
 }
 
@@ -641,7 +641,7 @@ bool Type::isSignedIntegerType() const {
   if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
     // Incomplete enum types are not treated as integer types.
     // FIXME: In C++, enum types are never integer types.
-    if (ET->getDecl()->isComplete())
+    if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped())
       return ET->getDecl()->getIntegerType()->isSignedIntegerType();
   }
 
@@ -667,7 +667,7 @@ bool Type::isUnsignedIntegerType() const {
   if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
     // Incomplete enum types are not treated as integer types.
     // FIXME: In C++, enum types are never integer types.
-    if (ET->getDecl()->isComplete())
+    if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped())
       return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
   }
 
diff --git a/test/SemaCXX/enum-scoped.cpp b/test/SemaCXX/enum-scoped.cpp
index 8c4bfe72d3..fc871cf379 100644
--- a/test/SemaCXX/enum-scoped.cpp
+++ b/test/SemaCXX/enum-scoped.cpp
@@ -109,3 +109,13 @@ void PR9333() {
   scoped_enum e = scoped_enum::yes;
   if (e == scoped_enum::no) { }
 }
+
+// <rdar://problem/9366066>
+namespace rdar9366066 {
+  enum class X : unsigned { value };
+
+  void f(X x) {
+    x % X::value; // expected-error{{invalid operands to binary expression ('rdar9366066::X' and 'rdar9366066::X')}}
+    x % 8; // expected-error{{invalid operands to binary expression ('rdar9366066::X' and 'int')}}
+  }
+}