merge(3p/absl): subtree merge of Abseil up to e19260f r/1889

... notably, this includes Abseil's own StatusOr type, which
conflicted with our implementation (that was taken from TensorFlow).

Change-Id: Ie7d6764b64055caaeb8dc7b6b9d066291e6b538f

1 files changed, 11 insertions, 0 deletions

diff --git a/third_party/abseil_cpp/absl/flags/flag_test.cc b/third_party/abseil_cpp/absl/flags/flag_test.cc
index 2eb2ba71d37c..654c8122215c 100644
--- a/third_party/abseil_cpp/absl/flags/flag_test.cc
+++ b/third_party/abseil_cpp/absl/flags/flag_test.cc
@@ -812,6 +812,17 @@ ABSL_RETIRED_FLAG(bool, old_bool_flag, true, "old descr");
 ABSL_RETIRED_FLAG(int, old_int_flag, (int)std::sqrt(10), "old descr");
 ABSL_RETIRED_FLAG(std::string, old_str_flag, "", absl::StrCat("old ", "descr"));
 
+bool initializaion_order_fiasco_test = [] {
+  // Iterate over all the flags during static initialization.
+  // This should not trigger ASan's initialization-order-fiasco.
+  auto* handle1 = absl::FindCommandLineFlag("flag_on_separate_file");
+  auto* handle2 = absl::FindCommandLineFlag("retired_flag_on_separate_file");
+  if (handle1 != nullptr && handle2 != nullptr) {
+    return handle1->Name() == handle2->Name();
+  }
+  return true;
+}();
+
 namespace {
 
 TEST_F(FlagTest, TestRetiredFlagRegistration) {