fix a buggy fall through that caused a crash-on-invalid.  rdar://6248081


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60961 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index b18d505..0d324ec 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -644,16 +644,16 @@
     SourceLocation AtLoc = ConsumeToken();
     return Owned(ParseObjCAtExpression(AtLoc));
   }
-  case tok::l_square:
-    // These can be followed by postfix-expr pieces.
-    if (getLang().ObjC1)
-      return ParsePostfixExpressionSuffix(Owned(ParseObjCMessageExpression()));
-    // FALL THROUGH.
   case tok::caret:
     if (getLang().Blocks)
       return ParsePostfixExpressionSuffix(Owned(ParseBlockLiteralExpression()));
     Diag(Tok, diag::err_expected_expression);
     return ExprError();
+  case tok::l_square:
+    // These can be followed by postfix-expr pieces.
+    if (getLang().ObjC1)
+      return ParsePostfixExpressionSuffix(Owned(ParseObjCMessageExpression()));
+    // FALL THROUGH.
   default:
   UnhandledToken:
     Diag(Tok, diag::err_expected_expression);