Fix crashes in UnwrappedLineParser on missing parens.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172239 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index a2f150d..a0cfeee 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -1114,8 +1114,12 @@
                "}");
 }
 
-TEST_F(FormatTest, IncorrectIf) {
+TEST_F(FormatTest, IncorrectCodeMissingParens) {
   verifyFormat("if {\n  foo;\n  foo();\n}");
+  verifyFormat("switch {\n  foo;\n  foo();\n}");
+  verifyFormat("for {\n  foo;\n  foo();\n}");
+  verifyFormat("while {\n  foo;\n  foo();\n}");
+  verifyFormat("do {\n  foo;\n  foo();\n} while;");
 }
 
 TEST_F(FormatTest, DoesNotTouchUnwrappedLinesWithErrors) {