[clang-format] fix crash in NamespaceEndCommentsFixer (PR32438)

Summary:
The new test case was crashing before. Now it passes
as expected.

Reviewers: djasper

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D31441

llvm-svn: 299465

clang/lib/Format/NamespaceEndCommentsFixer.cpp

@@ -133,7 +133,7 @@ tooling::Replacements NamespaceEndCommentsFixer::analyze(
     // Detect "(inline)? namespace" in the beginning of a line.
     if (NamespaceTok->is(tok::kw_inline))
       NamespaceTok = NamespaceTok->getNextNonComment();
-    if (NamespaceTok->isNot(tok::kw_namespace))
+    if (!NamespaceTok || NamespaceTok->isNot(tok::kw_namespace))
       continue;
     FormatToken *RBraceTok = EndLine->First;
     if (RBraceTok->Finalized)

clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp

@@ -582,6 +582,21 @@ TEST_F(NamespaceEndCommentsFixerTest,
                                     "} // namespace\n"
                                     "}"));
 }
+
+TEST_F(NamespaceEndCommentsFixerTest, HandlesInlineAtEndOfLine_PR32438) {
+  EXPECT_EQ("template <int> struct a {};\n"
+            "struct a<bool{}> b() {\n"
+            "}\n"
+            "#define c inline\n"
+            "void d() {\n"
+            "}\n",
+            fixNamespaceEndComments("template <int> struct a {};\n"
+                                    "struct a<bool{}> b() {\n"
+                                    "}\n"
+                                    "#define c inline\n"
+                                    "void d() {\n"
+                                    "}\n"));
+}
 } // end namespace
 } // end namespace format
 } // end namespace clang