2 files changed, 13 insertions, 0 deletions
diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 9efb6812673..6590f38bda0 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -2048,6 +2048,7 @@ void UnwrappedLineParser::addUnwrappedLine() {
   });
   CurrentLines->push_back(std::move(*Line));
   Line->Tokens.clear();
+  Line->MatchingOpeningBlockLineIndex = UnwrappedLine::kInvalidIndex;
   if (CurrentLines == &Lines && !PreprocessorDirectives.empty()) {
     CurrentLines->append(
         std::make_move_iterator(PreprocessorDirectives.begin()),
diff --git a/clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp b/clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp
index 09f21929c37..c24894e7d4e 100644
--- a/clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp
+++ b/clang/unittests/Format/NamespaceEndCommentsFixerTest.cpp
@@ -345,6 +345,18 @@ TEST_F(NamespaceEndCommentsFixerTest,
                                     "}\n"
                                     "}\n"));
 }
+
+TEST_F(NamespaceEndCommentsFixerTest,
+       DoesNotAddEndCommentForUnbalancedRBracesAfterNamespaceEnd) {
+  EXPECT_EQ("namespace {\n"
+            "  int i;\n"
+            "} // namespace\n"
+            "}",
+            fixNamespaceEndComments("namespace {\n"
+                                    "  int i;\n"
+                                    "} // namespace\n"
+                                    "}"));
+}
 } // end namespace
 } // end namespace format
 } // end namespace clang