Index: cfe/trunk/lib/Format/TokenAnnotator.cpp
===================================================================
--- cfe/trunk/lib/Format/TokenAnnotator.cpp
+++ cfe/trunk/lib/Format/TokenAnnotator.cpp
@@ -1034,7 +1034,8 @@
     if (Style.Language == FormatStyle::LK_JavaScript) {
       if (Current.is(tok::exclaim)) {
         if (Current.Previous &&
-            (Current.Previous->isOneOf(tok::identifier, tok::r_paren,
+            (Current.Previous->Tok.getIdentifierInfo() ||
+             Current.Previous->isOneOf(tok::identifier, tok::r_paren,
                                        tok::r_square, tok::r_brace) ||
              Current.Previous->Tok.isLiteral())) {
           Current.Type = TT_JsNonNullAssertion;
Index: cfe/trunk/unittests/Format/FormatTestJS.cpp
===================================================================
--- cfe/trunk/unittests/Format/FormatTestJS.cpp
+++ cfe/trunk/unittests/Format/FormatTestJS.cpp
@@ -1799,6 +1799,7 @@
       "            .foo()!\n"
       "            .foo()!;\n",
       getGoogleJSStyleWithColumns(20));
+  verifyFormat("let x = namespace!;\n");
 }
 
 TEST_F(FormatTestJS, Conditional) {