Diagnose miuse of property dot-syntax instead of crashing.

(radar 7634653).

llvm-svn: 99210

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -2332,6 +2332,7 @@ def warn_unused_call : Warning<
 
 def err_incomplete_type_used_in_type_trait_expr : Error<
   "incomplete type %0 used in type trait expression">;
+def err_expected_ident_or_lparen : Error<"expected identifier or '('">;
   
 // inline asm.
 def err_asm_wide_character : Error<"wide string is invalid in 'asm'">;

clang/lib/Sema/SemaExprObjC.cpp

@@ -289,7 +289,10 @@ Action::OwningExprResult Sema::ActOnClassPropertyRefExpr(
 
   IdentifierInfo *receiverNamePtr = &receiverName;
   ObjCInterfaceDecl *IFace = getObjCInterfaceDecl(receiverNamePtr);
-
+  if (!IFace) {
+    Diag(receiverNameLoc, diag::err_expected_ident_or_lparen);
+    return ExprError();
+  }
   // Search for a declared property first.
 
   Selector Sel = PP.getSelectorTable().getNullarySelector(&propertyName);

clang/test/SemaObjC/property-expression-error.m

@@ -16,3 +16,8 @@ int main() {
 	&object.index; // expected-error {{address of property expression requested}}
 	return 0;
 }
+
+typedef int Foo;
+void test() {
+  Foo.x;	// expected-error {{expected identifier or '('}}
+}