Minimal reproduction for SEGFAULT with -Wl,--as-needed -pthread -O2.

flto_repro/flto_repro.cc

Index: flto_repro/flto_repro.cc
diff --git a/ui/views/run_all_unittests_main.cc b/flto_repro/flto_repro.cc
similarity index 68%
copy from ui/views/run_all_unittests_main.cc
copy to flto_repro/flto_repro.cc
index f3b39f0e557965d7ae27a9a66c52ffd8d1f497e4..33408bc5d97ff100d43e1e5ef2ffe9b3ada339ed 100644
--- a/ui/views/run_all_unittests_main.cc
+++ b/flto_repro/flto_repro.cc
@@ -2,8 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/views/views_test_suite.h"
+#include <iostream>
+#include <string>
 
 int main(int argc, char** argv) {
-  return views::ViewsTestSuite(argc, argv).RunTests();
+  std::string s("banana");
+  return s.size();
 }