diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -5173,6 +5173,17 @@
                "           \"bbbb\");\n"
                "}",
                getLLVMStyleWithColumns(30));
+  verifyFormat("testPR42722() {\n"
+               "  int c = 19;\n"
+               "  int d = 32;\n"
+               "  Executor ex;\n"
+               "  ex.addFuture([]() {\n"
+               "      throw std::runtime_error(\"oops\");\n"
+               "    }).then([](Result &&result) {\n"
+               "    c++;\n"
+               "    d++\n"
+               "  });\n"
+               "}");
 }
 
 TEST_F(FormatTest, BreaksAccordingToOperatorPrecedence) {