Don't crash on calling static member overloaded operator, PR14120

Patch from Brian Brooks!

llvm-svn: 167604

clang/lib/Sema/SemaOverload.cpp

@@ -10997,6 +10997,11 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Obj,
   // that calls this method, using Object for the implicit object
   // parameter and passing along the remaining arguments.
   CXXMethodDecl *Method = cast<CXXMethodDecl>(Best->Function);
+
+  // An error diagnostic has already been printed when parsing the declaration.
+  if (Method->isStatic())
+    return ExprError();
+
   const FunctionProtoType *Proto =
     Method->getType()->getAs<FunctionProtoType>();
 

clang/test/SemaCXX/overloaded-operator-decl.cpp

@@ -48,3 +48,13 @@ struct PR10839 {
   operator int; // expected-error{{'operator int' cannot be the name of a variable or data member}}
   int operator+; // expected-error{{'operator+' cannot be the name of a variable or data member}}
 };
+
+namespace PR14120 {
+  struct A {
+    static void operator()(int& i) { ++i; } // expected-error{{overloaded 'operator()' cannot be a static member function}}
+  };
+  void f() {
+    int i = 0;
+    A()(i);
+  }
+}