Fix a corner case that involved calling rethrow_if_nested with a type that had a deleted operator&. Added a test to catch this as well. Thanks to Ville for the heads-up.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@255517 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/language.support/support.exception/except.nested/rethrow_if_nested.pass.cpp

@@ -37,6 +37,13 @@ public:
     B(const B& b) : A(b) {}
 };
 
+class C
+{
+public:
+	virtual ~C() {}
+	C * operator&() const { assert(false); } // should not be called
+};
+
 int main()
 {
     {
@@ -79,7 +86,7 @@ int main()
     {
         try
         {
-            std::rethrow_if_nested(1);
+            std::rethrow_if_nested(C());
             assert(true);
         }
         catch (...)
@@ -87,4 +94,5 @@ int main()
             assert(false);
         }
     }
+
 }