1 files changed, 5 insertions, 0 deletions
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index 4ca5bb49b60..241609051a0 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -3026,6 +3026,11 @@ TEST_F(FormatTest, AlignsPipes) {
                "             << aaaaaaaaaaaaaaaaaaaaaaaaaaaa;",
                getLLVMStyleWithColumns(70));
 
+  // But sometimes, breaking before the first "<<" is necessary.
+  verifyFormat("Diag(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbb)\n"
+               "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
+               "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
+
   verifyFormat(
       "llvm::errs() << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
       "                    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");