Project import generated by Copybara.

GitOrigin-RevId: d89dba27e35462d7457121b978fd79214205e686
Change-Id: I0eae80578a93a580820bc90d42e6b42faf7fde0a
diff --git a/absl/debugging/internal/demangle_test.cc b/absl/debugging/internal/demangle_test.cc
index b9d9008..5ff64a3 100644
--- a/absl/debugging/internal/demangle_test.cc
+++ b/absl/debugging/internal/demangle_test.cc
@@ -23,6 +23,7 @@
 #include "absl/memory/memory.h"
 
 namespace absl {
+inline namespace lts_2018_06_20 {
 namespace debugging_internal {
 namespace {
 
@@ -188,4 +189,5 @@
 
 }  // namespace
 }  // namespace debugging_internal
+}  // inline namespace lts_2018_06_20
 }  // namespace absl