clang-format: [JS] Fix a crash in handledTemplateStrings.

llvm-svn: 281816
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 528986a..9ccb75b 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -1253,6 +1253,9 @@
   verifyFormat(
       "var x = `<ul>${xs.map(x => `<li>${x}</li>`).join('\\n')}</ul>`;");
   verifyFormat("var x = `he${({text: 'll'}.text)}o`;");
+
+  // Crashed at some point.
+  verifyFormat("}");
 }
 
 TEST_F(FormatTestJS, TaggedTemplateStrings) {