disable warning in os-test.cc

[abar52]

better to be all green

diff --git a/test/os-test.cc b/test/os-test.cc
index 44a2988f..2615c317 100644
--- a/test/os-test.cc
+++ b/test/os-test.cc
@@ -269,6 +269,8 @@ TEST(BufferedFileTest, CloseError) {
 TEST(BufferedFileTest, Fileno) {
   buffered_file f;
 #  ifndef __COVERITY__
+  // disable warning Death tests use fork(), which is unsafe
+  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
   // fileno on a null FILE pointer either crashes or returns an error.
   // Disable Coverity because this is intentional.
   EXPECT_DEATH_IF_SUPPORTED(

[vitaut]

Thanks for the suggestion. I think it's better to set the option for all tests here:

fmt/test/test-main.cc

Line 38 in 0544a22

return RUN_ALL_TESTS();

A PR would be welcome.

[vitaut]

Switched to threadsafe mode in f1794a8.